Abstract:
Novel partially fluorinated alkanes having the Formula: ##STR1## wherein each R is the same or different and is selected from the group consisting of CF 3 , CHF 2 , CH 2  F, and CH 3  CF 2 , and R&#39; is an alkyl or fluoroalkyl group having 1 to 6 carbon atoms have utility as solvents in a variety of industrial cleaning applications including cold cleaning, dry cleaning, and defluxing of printed circuit boards.

Description:
This application is a division of application Ser. No. 625,727, filed Dec. 4, 1990, now abandoned. 
    
    
     FIELD OF THE INVENTION 
     This invention relates to novel partially fluorinated alkanols having a tertiary structure and 4 to 9 carbon atoms. These compounds are useful in a variety of vapor degreasing, cold cleaning, and solvent cleaning applications including defluxing and dry cleaning. 
     BACKGROUND OF THE INVENTION 
     Cold cleaning is an application where numerous solvents are used. In most cold cleaning applications, the soiled part is either immersed in the fluid or wiped with rags or similar objects soaked in solvents and allowed to air dry. 
     In cold cleaning applications, the use of the aerosol packaging concept has long been found to be a convenient and cost effective means of dispensing solvents. Aerosol products utilize a propellant gas or mixture of propellant gases, preferably in a liquefied gas rather than a compressed gas state, to generate sufficient pressure to expel the active ingredients, i.e. product concentrates such as solvents, from the container upon opening of the aerosol valve. The propellants may be in direct contact with the solvent, as in most conventional aerosol systems, or may be isolated from the solvent, as in barrier-type aerosol systems. 
     Vapor degreasing and solvent cleaning with fluorocarbon based solvents have found widespread use in industry for the degreasing and otherwise cleaning of solid surfaces, especially intricate parts and difficult to remove soils. 
     In its simplest form, vapor degreasing or solvent cleaning consists of exposing a room temperature object to be cleaned to the vapors of a boiling solvent. Vapors condensing on the object provide clean distilled solvent to wash away grease or other contamination. Final evaporation of solvent from the object leaves behind no residue as would be the case where the object is simply washed in liquid solvent. 
     For soils which are difficult to remove, where elevated temperature is necessary to improve the cleaning action of the solvent, or for large volume assembly line operations where the cleaning of metal parts and assemblies must be done efficiently and quickly, the conventional operation of a vapor degreaser consists of immersing the part to be cleaned in a sump of boiling solvent which removes the bulk of the soil, thereafter immersing the part in a sump containing freshly distilled solvent near room temperature, and finally exposing the part to solvent vapors over the boiling sump which condense on the cleaned part. In addition, the part can also be sprayed with distilled solvent before final rinsing. 
     Vapor degreasers suitable in the above-described operations are well known in the art. For example, Sherliker et al. in U.S. Pat. No. 3,085,918 disclose such suitable vapor degreasers comprising a boiling sump, a clean sump, a water separator, and other ancillary equipment. 
     Chlorofluorocarbon solvents, such as trichlorotrifluoroethane, have attained widespread use in recent years as effective, nontoxic, and nonflammable agents useful in degreasing applications and other solvent cleaning applications. One isomer of trichlorotrifluoroethane is 1,1,2-trichloro-1,2,2-trifluoroethane (known in the art as CFC-113). CFC-113 has a boiling point of about 47° C. and has been found to have satisfactory solvent power for greases, oils, waxes and the like. It has therefore found widespread use for cleaning electric motors, compressors, heavy metal parts, delicate precision metal parts, printed circuit boards, gyroscopes, guidance systems, aerospace and missile hardware, aluminum parts and the like. 
     Another commonly used solvent is chloroform (known in the art as HCC-20) which has a boiling point of about 63° C. Perchloroethylene is a commonly used dry cleaning and vapor degreasing solvent which has a boiling point of about 121° C. These compounds are disadvantageous for use as solvents because they are toxic; also, chloroform causes liver damage when inhaled in excess. 
     Although chlorine is known to contribute to the solvency capability of a compound, fully halogenated chlorofluorocarbons and hydrochlorocarbons are suspected of causing environmental problems in connection with the earth&#39;s protective ozone layer. Thus, the art is seeking new compounds which do not contribute to environmental problems but yet provide the solvency properties of CFC-113. From an environmental standpoint, partially fluorinated alkanols are of interest because they are considered to be stratospherically safe substitutes for the currently used fully halogenated chlorofluorocarbons. 
     It is an object of this invention to provide novel partially fluorinated alkanols which are liquid at room temperature and which are useful as solvents for use in vapor degreasing, cold cleaning, and other solvent cleaning applications including defluxing applications and dry cleaning. 
     Another object of the invention is to Provide novel environmentally acceptable solvents for use in the aforementioned applications. 
     Other objects and advantages of the invention will become apparent from the following description. 
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     We have found a novel class of alkanols which we believe have good solvency characteristics. The present novel compounds are of the Formula: ##STR2## wherein each R is the same or different and is selected from the group consisting of CF 3 , CHF 2 , CH 2  F, and CH 3  CF 2  --, and R&#39; is an alkyl or fluoroalkyl group having 1 to 6 carbon atoms. 
     Because C in the Formula above has three alkyl groups thereon, these novel compounds have a tertiary structure. We believe that this tertiary structure provides good solvency power. When the present compounds are used as solvents, the compounds have good solvency power for polar contaminants such as polyols and amines and for nonpolar contaminants including hydrocarbons such as mineral oil. We also believe that these novel compounds have boiling points which are comparable to those of currently used solvents. 
     Preferably, R&#39; in the Formula above is selected the group consisting of CF 3 , CHF 2 , CH 2  F, CH 3 , CF 3  CF 2  --, CF 3  (CF 2 ) 2  --, CF 3  CF 2  CHF--, CF 3  CF 2  CH 2  --, CF 3  CHF--, CF 3  (CHF) 2  --, CF 3  CHFCF 2  --, CF 3  CHFCH 2  --, CF 3  CH 2  --, CF 3  (CH 2 ) 2  --, CF 3  CH 2  CF 2  --, CF 3  CH 2  CHF--, CHF 2  CF 2  --, CHF 2  (CF 2 ) 2  --, CHF 2  CF 2  CHF--, CHF 2  CF 2  CH 2  --, CHF 2  CHF--, CHF 2  (CHF) 2  --, CHF 2  CHFCF 2  --, CHF 2  CHFCH 2  --, CHF 2  CH 2  --, CHF 2  (CH 2 ) 2  --, CHF 2  CH 2  CF 2  --, CHF 2  CH 2  CHF--, CH 2  FCF 2  --, CH 2  F(CF 2 ) 2  --, CH 2  FCF 2  CHF-- , CH 2  FCF 2  CH 2  --, CH 2  FCHF--, CH 2  F(CHF) 2  --, CH 2  FCHFCF 2  --, CH 2  FCHFCH 2  --, CH 2  FCH 2  --, CH 2  F(CH 2 ) 2  --, CH 2  FCH 2  CF 2  --, CH 2  FCH 2  CHF--, CH 3  CF 2  --, CH 3  (CF 2 ) 2  --, CH 3  CF 2  CHF--, CH 3  CF 2  CH 2  --, CH 3  CHF--, CH 3  (CHF) 2  --, CH 3  CHFCF 2  --, CH 3  CHFCH 2  --, CH 3  CH 2  --, CH 3  (CH 2 ) 2  --, CH 3  (CH 2 ) 3  --, CH 3  CH 2  CF 2  --, CH 3  (CH 2 ) 2  CF 2  --, CH 3  (CH 2 ) 3  CF 2  --, CH 3  CH 2  (CF 2 ) 2  --, CH 3  (CH 2 ) 2  (CF 2 ) 2  --, and CH 3  (CH 2 ) 3  (CF 2 ) 2  --. 
     In the Formula above, when one R is CF 3 , the other R is CHF 2 , and R&#39; is CH 3 , the compound is 2-methyl-1,1,1,3,3-pentafluoro-2-propanol. When one R is CF 3 , the other R is CHF 2 , and R&#39; is CF 3  CF 2  --, the compound is 2-difluoromethyl-1,1,1,3,3,4,4,4-octafluoro-2-butanol. When one R is CF 3 , the other R is CHF 2 , and R&#39; is CH 3  CF 2  --, the compound is 2-difluoromethyl-1,1,1,3,3-pentafluoro-2-butanol. When one R is CF 3 , the other R is CHF 2 , and R&#39; is CH 3  (CF 2 ) 2  --, the compound is 2-difluoromethyl-1,1,1,3,3,4,4-heptafluoro-2-pentanol. When one R is CF 3 , the other R is CHF 2 , and R&#39; is CH 3  CH 2  CF 2  --, the compound is 2-difluoromethyl-1,1,1,3,3-pentafluoro-2-pentanol. When one R is CF 3 , the other R is CHF 2 , and R&#39; is CH 3  CH 2  (CF 2  ) 2  --, the compound is 2-difluoromethyl-1,1,1,3,3,4,4-heptafluoro-2-hexanol. 
     When one R is CF 3 , the other R is CH 2  F, and R&#39; is CH 3 , the compound is 2-methyl-1,1,1,3-tetrafluoro-2-propanol. When one R is CF 3 , the other R is CH 2  F, and R&#39; is CHF 2  CHF--, the compound is 2-fluoromethyl-1,1,1,3,4,4-hexafluoro-2-butanol. When one R is CF 3 , the other R is CH 2  F, and R&#39; is CH 3  CF 2  --, the compound is 2-fluoromethyl-1,1,1,3,3-pentafluoro-2-butanol. When one R is CF 3 , the other R is CH 2  F, and R&#39; is CH 3  (CF 2 ) 2  --, the compound is 2fluoromethyl-1,1,1,3,3,4,4-heptafluoro-2-pentanol. When one R is CF 3 , the other R is CH 2  F, and R&#39; is CH 3  CH 2  CF 2  --, the compound is 2-fluoromethyl-1,1,1,3,3-pentafluoro-2-pentanol. When one R is CF 3 , the other R is CH 2  F, and R&#39; is CH 3  CH 2  (CF 2 ) 2  --, the compound is 2-fluoromethyl-1,1,1,3,3,4,4-heptafluoro-2-hexanol. 
     When one R is CF 3 , the other R is CH 3  CF 2  --, and R&#39; is CH 3 , the compound is 2-methyl-1,1,1,3,3-pentafluoro-2-butanol. When one R is CHF 2 , the other R is CH 2  F, and R&#39; is CH 3 , the compound is 2-methyl-1,1,3-trifluoro-2-propanol. 
     It is believed that the present novel compounds may be prepared by adapting known methods for preparing known alkanols coupled with the knowledge of one skilled in the art. For example, 2-methyl-1,1,1,3,3-pentafluoro-2-propanol may be prepared by reacting commercially available 1,1,1-trifluoro-2-propanone with CF 2  carbene to form 2-trifluoromethyl-1,1-difluoro-1-propene which may then be reacted with sulfuric acid and then water to form 2-methyl-1,1,1,3,3-pentafluoro-2-propanol. 
     To prepare 2-difluoromethyl-1,1,1,3,3,4,4,4-octafluoro-2-butanol, caesium fluoride and perfluoro-3-methylbut-1-ene may be reacted in moist sulpholan as taught by Robert N. Haszeldine et al., &#34;Fluoro-olefin Chemistry. Part 11. Some Reactions of Perfluoro-3-methylbut-1-ene under Ionic and Free-radical Conditions&#34;, J. Chem. Soc. 565 (1979) to form 2-trifluoromethyl-1,1,1,3,3,4,4,4-octafluorobutane. The 2-trifluoromethyl-1,1,1,3,3,4,4,4-octafluorobutane may then be dehydrohalogenated and then reacted with sulfuric acid and then water to form 2-difluoromethyl-1,1,1,3,3,4,4,4-octafluoro-2-butanol. 
     As another example, 2-difluoromethyl-1,1,1,3,3-pentafluoro-2-butanol may be prepared by fluorinating commercially available 2-butanone to form 2,2-difluorobutane which may then be dehydrogenated to form 3,3-difluoro-1-butene. CF 3  may then be added to the 3,3-difluoro-1-butene to form 2-trifluoromethyl-1,3,3-trifluorobutane which may then be dehydrogenated to form 2-trifluoromethyl-1,3,3-trifluoro-1-butene. The 2-trifluoromethyl-1,3,3-trifluoro-1-butene may then be reacted with hydrogen fluoride to form 2-difluoromethyl-1,1,1,3,3,3-hexafluorobutane which may then be dehydrogenated to form 2-trifluoromethyl-1,1,3,3-tetrafluoro-1-butene which may then be reacted with sulfuric acid and then water to form 2-difluoromethyl-1,1,1,3,3-pentafluoro-2-butanol. 
     As another example, 2-difluoromethyl-1,1,1,3,3,4,4-heptafluoro-2-pentanol may be prepared by fluorinating commercially available 2,3-pentanedione to form 2,2,3,3-tetrafluoropentane which may then be dehydrogenated to form 3,3,4,4-tetrafluoro-1-pentene. CF 3  may then be added to the 3,3,4,4-tetrafluoro-1-pentene to form 2-trifluoromethyl-1,3,3,4,4-pentafluoropentane which may then be dehydrogenated to form 2-trifluoromethyl-1,3,3,4,4-pentafluoro-1-pentene. The 2-trifluoromethyl-1,3,3,4,4-pentafluoro-1-pentene may then be reacted with hydrogen fluoride to form 2-trifluoromethyl-1,1,3,3,4,4-hexafluoropentane which may then be dehydrogenated to form 2-trifluoromethyl-1,1,3,3,4,4-hexafluoro-1-pentene which may then be reacted with sulfuric acid and then water to form 2-difluoromethyl-1,1,1,3,3,4,4-heptafluoro-2-pentanol. 
     As another example, 2-difluoromethyl-1,1,1,3,3-pentafluoro-2-pentanol may be prepared by fluorinating commercially available 3-pentanone to form 3,3-difluoropentane which may then be dehydrogenated to form 3,3-difluoro-1-pentene. CF 3  may then be reacted with the 3,3-difluoro-1-pentene to form 2-trifluoromethyl-1,3,3-trifluoropentane which may then be dehydrogenated to form 2-trifluoromethyl-1,3,3-trifluoro-1-pentene. The 2-trifluoromethyl-1,3,3-trifluoro-1-pentene may then be reacted with hydrogen fluoride to form 2-trifluoromethyl-1,1,3,3-tetrafluoropentane which may then be dehydrogenated to form 2-trifluoromethyl-1,1,3,3-tetrafluoro-1-pentene which may then be reacted with sulfuric acid and then water to form 2-difluoromethyl-1,1,1,3,3-pentafluoro-2-pentanol. 
     As another example, 2-difluoromethyl-1,1,1,3,3,4,4-heptafluoro-2-hexanol may be prepared by fluorinating commercially available 3,4-hexanedione to form 3,3,4,4-tetrafluorohexane which may then be dehydrogenated to form 3,3,4,4-tetrafluoro-1-hexene. CF 3  may then be added to the 3,3,4,4-tetrafluoro-1-hexene to form 2-trifluoromethyl-1,3,3,4,4-pentafluorohexane which may then be dehydrogenated to form 2-trifluoromethyl-1,3,3,4,4-pentafluoro-1-hexene. The 2-trifluoromethyl-1,3,3,4,4-pentafluoro-1-hexene may then be reacted with hydrogen fluoride to form 2-trifluoromethyl-1,1,3,3,4,4-hexafluorohexane which may then be dehydrogenated to form 2-trifluoromethyl-1,1,3,3,4,4-hexafluoro-1-hexene which may then be reacted with sulfuric acid and then water to form 2-difluoromethyl-1,1,1,3,3,4,4-heptafluoro-2-hexanol. 
     As another example, 2-methyl-1,1,1,3-tetrafluoro-2-propanol may be prepared by reacting commercially available methacrylic acid with hydrogen fluoride to form 2-methyl-3-fluoropropanoic acid which may then be fluorinated to form 2-methyl-1,1,1,3-tetrafluoropropane. The 2-methyl-1,1,1,3-tetrafluoropropane may then be dehydrogenated and reacted with sulfuric acid and then water to form 2-methyl-1,1,1,3-tetrafluoro-2-propanol. 
     As another example, 2-fluoromethyl-1,1,1,3,4,4-hexafluoro-2-butanol may be prepared by fluorinating commercially available 3-chloropropionic acid to form 1,1,1,3-tetrafluoropropane which may then be reacted with CHF 2  CF carbene to form 2-fluoromethyl-1,1,1,3,4,4-hexafluorobutane. The 2-fluoromethyl-1,1,1,3,4,4-hexafluorobutane may then be dehydrogenated and reacted with sulfuric acid and then water to form 2-fluoromethyl-1,1,1,3,4,4-hexafluoro-2-butanol. 
     As another example, 2-fluoromethyl-1,1,1,3,3-pentafluoro-2-butanol may be prepared by fluorinating commercially available 2-butanone to form 2,2-difluorobutane which may then be dehydrogenated to form 3,3-difluoro-1-butene. CF 3  may then be added to the 3,3-difluoro-1-butene to form 2-trifluoromethyl-1,3,3-trifluorobutane which may then be dehydrogenated to form 2-trifluoromethyl-1,3,3-trifluoro-1-butene. The 2-trifluoromethyl-1,3,3-trifluoro-1-butene may then be reacted with sulfuric acid and then water to form 2-fluoromethyl-1,1,1,3,3-pentafluoro-2-butanol. 
     As another example, 2-fluoromethyl-1,1,1,3,3,4,4-heptafluoro-2-pentanol may be prepared by fluorinating commercially available 2,3-pentanedione to form 2,2,3,3-tetrafluoropentane which may then be dehydrogenated to form 3,3,4,4-tetrafluoro-1-pentene. CF 3  may then be added to the 3,3,4,4-tetrafluoro-1-pentene to form 2-trifluoromethyl-1,3,3,4,4-pentafluoropentane which may then be dehydrogenated to form 2-trifluoromethyl-1,3,3,4,4-pentafluoro-1-pentene. The 2-trifluoromethyl-1,3,3,4,4-pentafluoro-1-pentene may then be reacted with sulfuric acid and then water to form 2-fluoromethyl-1,1,1,3,3,4,4-heptafluoro-2-pentanol. 
     As another example, 2-fluoromethyl-1,1,1,3,3-pentafluoro-2-pentanol may be prepared by fluorinating 3-pentanone to form 3,3-difluoropentane which may then be dehydrogenated to form 3,3-difluoro-1-pentene. CF 3  may then be reacted with the 3,3-difluoro-1-pentene to form 2-trifluoromethyl-1,3,3-trifluoropentane which may then be dehydrogenated to form 2-trifluoromethyl-1,3,3-trifluoro-1-pentene. The 2-trifluoromethyl-1,3,3-trifluoro-1-pentene may then be reacted with sulfuric acid and then water to form 2-fluoromethyl-1,1,1,3,3-pentafluoro-2-pentanol. 
     As another example, 2-fluoromethyl-1,1,1,3,3,4,4-heptafluoro-2-hexanol may be prepared by fluorinating commercially available 3,4-hexanedione to form 3,3,4,4-tetrafluorohexane which may then be dehydrogenated to form 3,3,4,4-tetrafluoro-1-hexene. CF 3  may then be added to the 3,3,4,4-tetrafluoro-1-hexene to form 2-trifluoromethyl-1,3,3,4,4-pentafluorohexane which may then be dehydrogenated to form 2-trifluoromethyl-1,3,3,4,4-pentafluoro-1-hexene. The 2-trifluoromethyl-1,3,3,4,4-pentafluoro-1-hexene may then be reacted with sulfuric acid and then water to form 2-fluoromethyl-1,1,1,3,3,4,4-heptafluoro-2-hexanol. 
     As another example, 2-methyl-1,1,1,3,3-pentafluoro-2-butanol may be prepared by fluorinating commercially available 2-methyl-1-buten-3-yne to form 2-methyl-1,2,3,4-tetrafluoro-1-butene which may then be reacted with hydrogen fluoride to form 2-methyl-1,2,3,3,4-pentafluorobutane. The 2-methyl-1,2,3,3,4-pentafluorobutane may then be dehalogenated to form 3-methyl-2,3,4-trifluoro-1-butene which may then be reacted with hydrogen fluoride to form 2-methyl-1,2,3,3-tetrafluorobutane. The 2-methyl-1,2,3,3-tetrafluorobutane may then be dehalogenated to form 2-methyl-1,3,3-trifluoro-1-butene which may then be fluorinated to form 2-methyl-1,1,2,3,3-pentafluorobutane. The 2-methyl-1,1,2,3,3-pentafluorobutane may then be dehydrohalogenated to form 2-methyl-1,1,3,3-tetrafluoro-1-butene which may then be reacted with hydrogen fluoride to form 2-methyl-1,1,1,3,3-pentafluorobutane. The 2-methyl-1,1,1,3,3-pentafluorobutane may then be dehydrogenated and then reacted with sulfuric acid and water to form 2-methyl-1,1,1,3,3-pentafluoro-2-butanol. 
     As another example, 2-methyl-1,1,3-trifluoro-2-propanol may be prepared by reacting commercially available fluoroacetone with a CF 2  carbene to form 2-methyl-1,1,3-trifluoro-1-propene which may then be reacted with sulfuric acid and then water to form 2-methyl-1,1,3-trifluoro-2-propanol. 
     Preferably, each R in the Formula above is the same. When each R is CHF 2  and R&#39; is CF 3 , the compound is 2-difluoromethyl-1,1,1,3,3-pentafluoro-2-propanol. When each R is CHF 2  and R&#39; is CHF 2 , the compound is 2-difluoromethyl-1,1,3,3-tetrafluoro-2-propanol. When each R is CHF 2  and R&#39; is CH 2  F, the compound is 2-fluoromethyl-1,1,3,3-tetrafluoro-2-propanol. When each R is CHF 2  and R&#39; is CH 3 , the compound is 2-methyl-1,1,3,3-tetrafluoro-2-propanol. When each R is CH 2  F and R&#39; is CHF 2 , the compound is 2-fluoromethyl-1,1,3-trifluoro-2-propanol. When each R is CH 2  F and R&#39; is CH 2  F, the compound is 2-fluoromethyl-1,3-difluoro-2-propanol. 
     As another preparation example, 2-difluoromethyl-1,1,1,3,3-pentafluoro-2-propanol may be prepared by fluorinating commercially available 1,1,1,3,3-pentachloro-2-propanone to form 1,1,1,3,3-pentafluoro-2-propanone which may then be reacted with CF 2  carbene to form 2-difluoromethyl-1,1,3,3,3-tetrafluoro-1-propene. The 2-difluoromethyl-1,1,3,3,3-tetrafluoro-1-propene may then be reacted with sulfuric acid and then water to form 2-difluoromethyl-1,1,1,3,3-pentafluoro-2-propanol. 
     As another example, the 2-difluoromethyl-1,1,3,3-tetrafluoro-2-propanol may be prepared by fluorinating commercially available 1,1,3-trichloro-2-propanone to form 1,1,3-trifluoro-2-propanone which may then be reacted with CF 2  carbene to form 2-fluoromethyl-1,1,3,3-tetrafluoro-1-propene. The 2-fluoromethyl-1,1,3,3-tetrafluoro-1-propene may then be hydrogenated to form 2-fluoromethyl-1,1,3,3-tetrafluoropropane. The 2-fluoromethyl-1,1,3,3-tetrafluoropropane may then be dehydrogenated to form 2-difluoromethyl-1,3,3-trifluoro-1-propene which may then be reacted with hydrogen fluoride to form 2-difluoromethyl-1,1,3,3-tetrafluoropropane. The 2-difluoromethyl-1,1,3,3-tetrafluoropropane may then be dehydrogenated and then reacted with sulfuric acid and then water to form 2-difluoromethyl-1,1,3,3-tetrafluoro-2-propanol. 
     As another example, 2-fluoromethyl-1,1,3,3-tetrafluoro-2-propanol may be prepared by fluorinating commercially available 1,1,3-trichloro-2-propanone to form 1,1,3-trifluoro-2-propanone which may then be reacted with CF 2  carbene to form 2-fluoromethyl-1,1,3,3-tetrafluoro-1-propene. The 2-fluoromethyl-1,1,3,3-tetrafluoro-1-propene may then be reacted with sulfuric acid and then water to form 2-fluoromethyl-1,1,3,3-tetrafluoro-2-propanol. 
     As another example, 2-methyl-1,1,3,3-tetrafluoro-2-propanol may be prepared by fluorinating commercially available 1,1-dichloro-2-propanone to form 1,1-difluoro-2-propanone which may then be reacted with CF 2  carbene to form 2-methyl-1,1,3,3-tetrafluoro-1-propene. The 2-methyl-1,1,3,3-tetrafluoro-1-propene may then be reacted with sulfuric acid and then water to form 2-methyl-1,1,3,3-tetrafluoro-2-propanol. 
     As another example, the 2-fluoromethyl-1,1,3-trifluoro-2-propanol may be prepared by oxidizing commercially available 1,3-difluoro-2-propanol to 1,3-difluoro-2-propanone which may then be reacted with a CF 2  carbene to form 2-fluoromethyl-1,1,3-trifluoro-1-propene. The 2-fluoromethyl-1,1,3-trifluoro-1-propene may then be reacted with sulfuric acid and then water to form 2-fluoromethyl-1,1,3-trifluoro-2-propanol. 
     As another example, the 2-fluoromethyl-1,3-difluoro-2-propanol may be prepared by oxidizing commercially available 1,3-difluoro-2-propanol to 1,3-difluoro-2-propanone which may then be reacted with a CF 2  carbene to form 2-fluoromethyl-1,1,3-trifluoro-1-propene. The 2-fluoromethyl-1,1,3-trifluoro-1-propene may then be hydrogenated to form 2-fluoromethyl-1,1,3-trifluoropropane. The 2-fluoromethyl-1,1,3-trifluoropropane may then be dehydrohalogenated to form 2-fluoromethyl-1,3-difluoro-1-propene which may then be reacted with sulfuric acid and then water to form 2-fluoromethyl-1,3-difluoro-2-Propanol. 
     More preferably, each R in the Formula above is CF 3 . When R is CF 3  CF 2  CHF--, the compound is 2-trifluoromethyl-1,1,1,3,4,4,5,5,5-nonafluoro-2-pentanol. To prepare 2-trifluoromethyl-1,1,1,3,4,4,5,5,5-nonafluoro-2-pentanol, commercially available hexafluoropropene may be oligomerized with commercially available trimethylamine in a dipolar aprotic solvent such as commercially available tetrahydrofuran to provide (CF 3 ) 2  C:CFCF 2  CF 3  as taught by W. Brunskill et al., &#34;Anionic Oligomerisation of Hexafluoropropene: Fission of a Carbon-Carbon Bond by Fluoride Ion&#34;, Chemical Communications, 1444 (1970); the (CF 3 ) 2  C:CFCF 2  CF 3  may then be reacted with sulfuric acid and then water to form 2-trifluoromethyl-1,1,1,3,4,4,5,5,5-nonafluoro-2-pentanol. 
     Most preferably, each R is CF 3  and R&#39; is selected from the group consisting of CHF 2 , CH 3 , CF 3  CF 2  CHF--, CF 3  CHF--, CF 3  CH 2  --, CHF 2  CH 2  --, CH 3  CF 2  --, CH 3  CH 2  CF 2  --, CH 3  (CH 2 ) 2  CF 2  --, CH 3  CH 2  --, and CH 3  (CH 2 ) 2  --. The names of the preceding preferred hydrofluorocarbons are 2-difluoromethyl-1,1,1,3,3,3-hexafluoro-2-propanol; 2-methyl-1,1,1,3,3,3-hexafluoro-2-propanol; 2-trifluoromethyl-1,1,1,3,4,4,5,5,5-nonafluoro-2-pentanol; 2-trifluoromethyl-1,1,1,3,4,4,4-heptafluoro-2-butanol: 2-trifluoromethyl-1,1,1,4,4,4-hexafluoro-2-butanol; 2-trifluoromethyl-1,1,1,4,4-pentafluoro-2-butanol; 2-trifluoromethyl-1,1,1,3,3-pentafluoro-2-butanol; 2-trifluoromethyl-1,1,1,3,3-pentafluoro-2-pentanol: 2-trifluoromethyl-1,1,1,3,3-pentafluoro-2-hexanol; 2-trifluoromethyl-1,1,1-trifluoro-2-butanol; and 2-trifluoromethyl-1,1,1-trifluoro-2-pentanol. 
     As another example, 2-difluoromethyl-1,1,1,3,3,3-hexafluoro-2-propanol may be prepared by treating commercially available hexafluoropropene with hydrogen fluoride as taught by commonly assigned U.K. Patent 902,590 to form 1,1,1,2,3,3,3-heptafluoropropane. The 1,1,1,2,3,3,3-heptafluoropropane may then be heated at 475°-700° C. in the presence of activated carbon as taught by commonly assigned U.S. Pat. No. 2,981,763 which is incorporated herein by reference to form 2-trifluoromethyl-1,1,1,3,3,3-hexafluoropropane or nonafluoroisobutane. The nonafluoroisobutane may then be treated with commercially available benzoyl chloride in the presence of commercially available triethylamine as taught by B. L. Dyatkin et al., &#34;The Perfluoro-t-butyl Anion in the Synthesis of Organofluorine Compounds&#34;, Russian Chemical Reviews 45(7). 607 (1976) to form perfluoroisobutene. The perfluoroisobutene may then be reacted with sulfuric acid and then water to form 2-difluoromethyl-1,1,1,3,3,3-hexafluoro-2-propanol. 
     As another example, 2-methyl-1,1,1,3,3,3-hexafluoro-2-propanol may be prepared by reacting commercially available hexafluoropropene with elemental sulfur and commercially available potassium fluoride in commercially available dimethylformamide under substantially atmospheric pressure and at temperatures between 25°-100° C. as taught by commonly assigned U.S. Pat. No. 4,326,068 which is incorporated herein by reference to form hexafluorothioacetone dimer. The hexafluorothioacetone dimer may then be reacted with commercially available formaldehyde as taught by commonly assigned U.S. Pat. No. 4,367,349 which is incorporated herein by reference to form hexafluoroisobutylene. The hexafluoroisobutylene may then be reacted with sulfuric acid and then water to form 2-methyl-1,1,1,3,3,3-hexafluoro-2-propanol. 
     To prepare 2-trifluoromethyl-1,1,1,3,4,4,5,5,5-nonafluoro-2-pentanol, commercially available hexafluoropropene may be oligomerized with commercially available trimethylamine in a dipolar aprotic solvent such as commercially available tetrahydrofuran to provide (CF 3 ) 2  C:CFCF 2  CF 3  which is then reacted with commercially available hydrogen fluoride to yield 2-trifluoromethyl-1,1,1,3,3,4,4,5,5,5-decafluoropentane as taught by W. Brunskill et al., &#34;Anionic Oligomerisation of Hexafluoropropene: Fission of a Carbon-Carbon Bond by Fluoride Ion&#34;, Chemical Communications, 1444 (1970). The 2-trifluoromethyl-1,1,1,3,3,4,4,5,5,5-decafluoropentane may then be dehydrohalogenated and then reacted with sulfuric acid and then water to form 2-trifluoromethyl-1,1,1,3,4,4,5,5,5-nonafluoro-2-pentanol. 
     As another example, 2-trifluoromethyl-1,1,1,3,4,4,4-heptafluoro-2-butanol may be prepared by reacting commercially available 1,1-difluoroethylene according to the procedure of George L. Fleming et al., &#34;Addition of Free Radicals to Unsaturated Systems. Part XX. The Direction of Radical Addition of Heptafluoro-2-iodopropane to Vinyl Fluoride, Trifluoroethylene, and Hexafluoropropene&#34;, J. C. S. Perkin I, 574 (1973) to form a product which may then be fluorinated to form 2-trifluoromethyl-1,1,1,2,3,4,4,4-octafluorobutane. The 2-trifluoromethyl-1,1,1,2,3,4,4,4-octafluorobutane may then be dehydrohalogenated and then reacted with sulfuric acid and then water to form 2-trifluoromethyl-1,1,1,3,4,4,4-heptafluoro-2-butanol. 
     As another example, 2-trifluoromethyl-1,1,1,4,4,4-hexafluoro-2-butanol may be prepared by reacting commercially available 1,1-difluoroethylene according to the procedure of George L. Fleming et al., supra, to form a product which may then be reacted with hydrogen fluoride to form 2-trifluoromethyl-1,1,1,2,4,4,4-hexafluorobutane which may then be dehydrohalogenated and then reacted with sulfuric acid and then water to form 2-trifluoromethyl-1,1,1,4,4,4-hexafluoro-2-butanol. 
     As another example, 2-trifluoromethyl-1,1,1,4,4-pentafluoro-2-butanol may be prepared by reacting commercially available 1,1-difluoroethylene according to the procedure of George L. Fleming et al., supra, to form a product which may then be hydrogenated to form 2-trifluoromethyl-1,1,1,2,4,4-hexafluorobutane which may then be dehydrohalogenated and then reacted with sulfuric acid and then water to form 2-trifluoromethyl-1,1,1,4,4-pentafluoro-2-butanol. 
     As another example, 2-trifluoromethyl-1,1,1,3,3-pentafluoro-2-butanol may be prepared by fluorinating commercially available 2-butanone to form 2,2-difluorobutane which may then be dehydrogenated to form 3,3-difluoro-1-butene. CF 3  may then be added to the 3,3-difluoro-1-butene to form 2-trifluoromethyl-1,3,3-trifluorobutane which may then be dehydrogenated to form 2-trifluoromethyl-1,3,3-trifluoro-1-butene. The 2-trifluoromethyl-1,3,3-trifluoro-1-butene may then be reacted with hydrogen fluoride to form 2-difluoromethyl-1,1,1,3,3-pentafluorobutane which may then be dehydrogenated to form 2-trifluoromethyl-1,1,3,3-tetrafluoro-1-butene which may then be fluorinated to form 2-trifluoromethyl-1,1,1,2,3,3-hexafluorobutane. The 2-trifluoromethyl-1,1,1,2,3,3-hexafluorobutane is then hydrolyzed to form 2-trifluoromethyl-1,1,1,3,3-pentafluoro-2-butanol. 
     As another example, 2-trifluoromethyl-1,1,1,3,3-pentafluoro-2-pentanol may be prepared by fluorinating commercially available 3-pentanone to form 3,3-difluoropentane which may then be dehydrogenated to form 3,3-difluoro-1-pentene. CF 3  may then be reacted with the 3,3-difluoro-1-pentene to form 2-trifluoromethyl-1,3,3-trifluoropentane which may then be dehydrogenated to form 2-trifluoromethyl-1,3,3-trifluoro-1-pentene. The 2-trifluoromethyl-1,3,3-trifluoro-1-pentene may then be reacted with hydrogen fluoride to form 2-trifluoromethyl-1,1,3,3-tetrafluoropentane which may then be dehydrogenated to form 2-trifluoromethyl-1,1,3,3-tetrafluoro-1-pentene which may then be fluorinated to form 2-trifluoromethyl-1,1,1,2,3,3-hexafluoropentane. The 2-trifluoromethyl-1,1,1,2,3,3-hexafluoropentane is then hydrolyzed to form 2-trifluoromethyl-1,1,1,3,3-pentafluoro-2-pentanol. 
     As another example, 2-trifluoromethyl-1,1,1,3,3-pentafluoro-2-hexanol may be prepared by fluorinating commercially available 3-hexanone to form 3,3-difluorohexane which may then be dehydrogenated to form 3,3-difluoro-2-hexene. CF 3  may then be reacted with the 3,3-difluoro-2-hexene to form 2-trifluoromethyl-1,3,3-trifluorohexane which may then be dehydrogenated to form 2-trifluoromethyl-1,3,3-trifluoro-1-hexene. The 2-trifluoromethyl-1,3,3-trifluoro-1-hexene may then be reacted with hydrogen fluoride to form 2-trifluoromethyl-1,1,3,3-tetrafluorohexane which may then be dehydrogenated to form 2-trifluoromethyl-1,1,3,3-tetrafluoro-1-hexene which may then be fluorinated to form 2-trifluoromethyl-1,1,1,2,3,3-hexafluorohexane. The 2-trifluoromethyl-1,1,1,2,3,3-hexafluorohexane may then be hydrolyzed to form 2-trifluoromethyl-1,1,1,3,3-pentafluoro-2-hexanol. 
     As another example, 2-trifluoromethyl-1,1,1-trifluoro-2-butanol may be prepared by fluorinating commercially available butyraldehyde to form 1,1-difluorobutane which may then be dehydrogenated to form 1,1-difluoro-1-butene. CF 3  may then be reacted with the 1,1-difluoro-1-butene to form 2-trifluoromethyl-1,1,1-trifluorobutane which may then be dehydrogenated to form 2-trifluoromethyl-1,1,1-trifluoro-2-butene. The 2-trifluoromethyl-1,1,1-trifluoro-2-butene may then be reacted with water to form 2-trifluoromethyl-1,1,1-trifluoro-2-butanol. 
     As another example, 2-trifluoromethyl-1,1,1-trifluoro-2-pentanol may be prepared by fluorinating commercially available 2-pentenal to form 1,1,2,3-tetrafluoropentane which may then be dehydrogenated to form 1,1-difluoro-1-pentene. CF 3  may then be reacted with the 1,1-difluoro-1-pentene to form 2-trifluoromethyl-1,1,1-trifluoropentane which may then be dehydrogenated to form 2-trifluoromethyl-1,1,1-trifluoro-2-pentene. The 2-trifluoromethyl-1,1,1-trifluoro-2-pentene may then be reacted with water to form 2-trifluoromethyl-1,1,1-trifluoro-2-pentanol. 
     The present compounds are useful as solvents for use in vapor degreasing and other solvent cleaning applications including defluxing, cold cleaning, dry cleaning, dewatering, decontamination, spot cleaning, aerosol propelled rework, extraction, particle removal, and surfactant cleaning applications. These compounds are also useful as blowing agents, Rankine cycle and absorption refrigerants, and power fluids and especially as refrigerants for centrifugal refrigeration chillers. 
     The present invention also provides a method of cleaning a solid surface which comprises treating the surface with a compound having the Formula: ##STR3## wherein each R is the same or different and is selected from the group consisting of CF 3 , CHF 2 , CH 2  F, and CH 3  CF 2 , and R&#39; is an alkyl or fluoroalkyl group having 1 to 6 carbon atoms. 
     Preferably, R&#39; in the Formula above is selected from the group consisting of CF 3 , CHF 2 , CH 2  F, CH 3 , CF 3  CF 2  --, CF 3  (CF 2 ) 2  --, CF 3  CF 2  CHF--, CF 3  CF 2  CH 2  --, CF 3  CHF--, CF 3  (CHF) 2  --, CF 3  CHFCF 2  --, CF 3  CHFCH 2  --, CF 3  CH 2  --, CF 3  (CH 2 ) 2  --, CF 3  CH 2  CF 2  --, CF 3  CH 2  CHF--, CHF 2  CF 2  --, CHF 2  (CF 2 ) 2  --, CHF 2  CF 2  CHF--, CHF 2  CF 2  CH 2  --, CHF 2  CHF--, CHF 2  (CHF) 2  --, CHF 2  CHFCF 2  --, CHF 2  CHFCH 2  --, CHF 2  CH 2  --, CHF 2  (CH 2 ) 2  --, CHF 2  CH 2  CF 2  --, CHF 2  CH 2  CHF--, CH 2  FCF 2  --, CH 2  F(CF 2 ) 2  --, CH 2  FCF.sub. 2 CHF--, CH 2  FCF 2  CH 2  --, CH 2  FCHF--, CH 2  F(CHF) 2  --, CH 2  FCHFCF 2  --, CH 2  FCHFCH 2  --, CH 2  FCH 2  --, CH 2  F(CH 2 ) 2  --, CH 2  FCH 2  CF 2  --, CH 2  FCH 2  CHF--, CH 3  CF 2  --, CH 3  (CF 2 ) 2  --, CH 3  CF 2  CHF--, CH 3  CF 2  CH 2  --, CH 3  CHF--, CH 3  (CHF) 2  --, CH 3  CHFCF 2  --, CH 3  CHFCH 2  --, CH 3  CH 2  --, CH 3  (CH 2 ) 2  --, CH 3  (CH 2 ) 3  --, CH 3  CH 2  CF 2  --, CH 3  (CH 2 ) 2  CF 2  --, CH 3  (CH 2 ) 3  CF 2  --, CH 3  CH 2  (CF 2 ) 2  --, CH 3  (CH 2 ) 2  (CF 2 ) 2  --, and CH 3  (CH 2 ) 3  (CF 2 ) 2  --. 
     In the process embodiment of the invention, the compositions may be used to clean solid surfaces by treating the surfaces with the compounds in any manner well known to the art such as by dipping or spraying or use of conventional degreasing apparatus. 
     When the novel compounds are used to clean solid surfaces by spraying the surfaces with the compounds, preferably, the novel compounds are sprayed onto the surfaces by using a propellant. Preferably, the propellant is selected from the group consisting of hydrochlorofluorocarbon, hydrofluorocarbon, and mixtures thereof. Useful hydrochlorofluorocarbon propellants include dichlorofluoromethane (known in the art as HCFC-21), chlorodifluoromethane (known in the art as HCFC-22), 1,1-dichloro-2,2-difluoroethane (known in the art as HCFC-132a), 1-chloro-2,2,2-trifluoroethane (known in the art as HCFC-133), and 1-chloro-1,1-difluoroethane (known in the art as HCFC-142b); commercially available HCFC-21, HCFC-22, and HCFC-142b may be used in the present invention. Useful hydrofluorocarbon propellants include trifluoromethane (known in the art as HFC-23), 1,1,1,2-tetrafluoroethane (known in the art as HFC-134a), and 1,1-difluoroethane (known in the art as HFC-152a): commercially available HFC-23 and HFC-152a may be used in the present invention. Until HFC-134a becomes available in commercial quantities, HFC-134a may be made by a known method such as that disclosed by U.S. Pat. No. 4,851,595. Preferred propellants include chlorodifluoromethane and 1,1,1,2-tetrafluoroethane. The present invention is more fully illustrated by the following non-limiting Examples. 
     EXAMPLES 1-573 
     For each example, the novel compound of the Formula above having the R and R&#39; groups as indicated in Table I below is made. 
     
                       TABLE I______________________________________Example  R               R&#34;______________________________________ 1       CF.sub.3, CHF.sub.2                    CF.sub.3 2       CF.sub.3, CHF.sub.2                    CHF.sub.2 3       CF.sub.3, CHF.sub.2                    CH.sub.2 F 4       CF.sub.3, CHF.sub.2                    CH.sub.3 5       CF.sub.3, CHF.sub.2                    CF.sub.3 CF.sub.2 6       CF.sub.3, CHF.sub.2                    CF.sub.3 (CF.sub.2).sub.2 7       CF.sub.3, CHF.sub.2                    CF.sub.3 CF.sub.2 CHF 8       CF.sub.3, CHF.sub.2                    CF.sub.3 CF.sub.2 CH.sub.2 9       CF.sub.3, CHF.sub.2                    CF.sub.3 CHF 10      CF.sub.3, CHF.sub.2                    CF.sub.3 (CHF).sub.2 11      CF.sub.3, CHF.sub.2                    CF.sub.3 CHFCF.sub.2 12      CF.sub.3, CHF.sub.2                    CF.sub.3 CHFCH.sub.2 13      CF.sub.3, CHF.sub.2                    CF.sub.3 CH.sub.2 14      CF.sub.3, CHF.sub.2                    CF.sub.3 (CH.sub.2).sub.2 15      CF.sub.3, CHF.sub.2                    CF.sub.3 CH.sub.2 CF.sub.2 16      CF.sub.3, CHF.sub.2                    CF.sub.3 CH.sub.2 CHF 17      CF.sub.3, CHF.sub.2                    CHF.sub.2 CF.sub.2 18      CF.sub.3, CHF.sub.2                    CHF.sub.2 (CF.sub.2).sub.2 19      CF.sub.3, CHF.sub.2                    CHF.sub.2 CF.sub.2 CHF 20      CF.sub.3, CHF.sub.2                    CHF.sub.2 CF.sub.2 CH.sub.2 21      CF.sub.3, CHF.sub.2                    CHF.sub.2 CHF 22      CF.sub.3, CHF.sub.2                    CHF.sub.2 (CHF).sub.2 23      CF.sub.3, CHF.sub.2                    CHF.sub.2 CHFCF.sub.2 24      CF.sub.3, CHF.sub.2                    CHF.sub.2 CHFCH.sub.2 25      CF.sub.3, CHF.sub.2                    CHF.sub.2 CH.sub.2 26      CF.sub.3, CHF.sub.2                    CHF.sub.2 (CH.sub.2).sub.2 27      CF.sub.3, CHF.sub.2                    CHF.sub.2 CH.sub.2 CF.sub.2 28      CF.sub.3, CHF.sub.2                    CHF.sub.2 CH.sub.2 CHF 29      CF.sub.3, CHF.sub.2                    CH.sub.2 FCF.sub.2 30      CF.sub.3, CHF.sub.2                    CH.sub.2 F(CF.sub.2).sub.2 31      CF.sub.3, CHF.sub.2                    CH.sub.2 FCF.sub.2 CHF 32      CF.sub.3, CHF.sub.2                    CH.sub.2 FCF.sub.2 CH.sub.2 33      CF.sub.3, CHF.sub.2                    CH.sub.2 FCHF 34      CF.sub.3, CHF.sub.2                    CH.sub.2 (CHF).sub.2 35      CF.sub.3, CHF.sub.2                    CH.sub.2 FCHFCF.sub.2 36      CF.sub.3, CHF.sub.2                    CH.sub.2 FCHFCH.sub.2 37      CF.sub.3, CHF.sub.2                    CH.sub.2 FCH.sub.2 38      CF.sub.3, CHF.sub.2                    CH.sub.2 F(CH.sub.2).sub.2 39      CF.sub.3, CHF.sub.2                    CH.sub.2 FCH.sub.2 CF.sub.2 40      CF.sub.3, CHF.sub.2                    CH.sub.2 FCH.sub.2 CHF 41      CF.sub.3, CHF.sub.2                    CH.sub.3 CF.sub.2 42      CF.sub.3, CHF.sub.2                    CH.sub.3 (CF.sub.2).sub.2 43      CF.sub.3, CHF.sub.2                    CH.sub.3 CF.sub.2 CHF 44      CF.sub.3, CHF.sub.2                    CH.sub.3 CF.sub.2 CH.sub.2 45      CF.sub.3, CHF.sub.2                    CH.sub.3 CHF 46      CF.sub.3, CHF.sub.2                    CH.sub.3 (CHF).sub.2 47      CF.sub.3, CHF.sub.2                    CH.sub.3 CHFCF.sub.2 48      CF.sub.3, CHF.sub.2                    CH.sub.3 CHFCH.sub.2 49      CF.sub.3, CHF.sub.2                    CH.sub.3 CH.sub.2 CF.sub.2 50      CF.sub.3, CHF.sub.2                    CH.sub.3 CH.sub.2 (CF.sub.2).sub.2 51      CF.sub.3, CHF.sub.2                    CH.sub.3 (CH.sub.2)CF.sub.2 CF.sub.2 52      CF.sub.3, CHF.sub.2                    CH.sub.3 (CH.sub.2).sub.2 (CF.sub.2).sub.2 53      CF.sub.3, CHF.sub.2                    CH.sub.3 (CH.sub.2).sub.3 CF.sub.2 54      CF.sub.3, CHF.sub.2                    CH.sub.3 (CH.sub.2).sub.3 (CF.sub.2).sub.2 55      CF.sub.3, CH.sub.2 F                    CF.sub.3 56      CF.sub.3, CH.sub.2 F                    CHF.sub.2 57      CF.sub.3, CH.sub.2 F                    CH.sub.2 F 58      CF.sub.3, CH.sub.2 F                    CH.sub.3 59      CF.sub. 3, CH.sub.2 F                    CF.sub.3 CF.sub.2 60      CF.sub.3, CH.sub.2 F                    CF.sub.3 (CF.sub.2).sub.2 61      CF.sub.3, CH.sub.2 F                    CF.sub.3 CF.sub.2 CHF 62      CF.sub.3, CH.sub.2 F                    CF.sub.3 CF.sub.2 CH.sub.2 63      CF.sub.3, CH.sub.2 F                    CF.sub.3 CHF 64      CF.sub.3, CH.sub.2 F                    CF.sub.3 (CHF).sub.2 65      CF.sub.3, CH.sub.2 F                    CF.sub.3 CHFCF.sub.2 66      CF.sub.3, CH.sub.2 F                    CF.sub.3 CHFCH.sub.2 67      CF.sub.3, CH.sub.2 F                    CF.sub.3 CH.sub.2 68      CF.sub.3, CH.sub.2 F                    CF.sub.3 (CH.sub.2).sub.2 69      CF.sub.3, CH.sub.2 F                    CF.sub.3 CH.sub.2 CF.sub.2 70      CF.sub.3, CH.sub.2 F                    CF.sub.3 CH.sub.2 CHF 71      CF.sub.3, CH.sub.2 F                    CHF.sub.2 CF.sub.2 72      CF.sub.3, CH.sub.2 F                    CHF.sub.2 (CF.sub.2).sub.2 73      CF.sub.3, CH.sub.2 F                    CHF.sub.2 CF.sub.2 CHF 74      CF.sub.3, CH.sub.2 F                    CHF.sub.2 CF.sub.2 CH.sub.2 75      CF.sub.3, CH.sub.2 F                    CHF.sub.2 CHF 76      CF.sub.3, CH.sub.2 F                    CHF.sub.2 (CHF).sub.2 77      CF.sub.3, CH.sub.2 F                    CHF.sub.2 CHFCF.sub.2 78      CF.sub.3, CH.sub.2 F                    CHF.sub.2 CHFCH.sub.2 79      CF.sub.3, CH.sub.2 F                    CHF.sub.2 CH.sub.2 80      CF.sub.3, CH.sub.2 F                    CHF.sub.2 (CH.sub.2).sub.2 81      CF.sub.3, CH.sub.2 F                    CHF.sub.2 CH.sub.2 CF.sub.2 82      CF.sub.3, CH.sub.2 F                    CHF.sub.2 CH.sub.2 CHF 83      CF.sub.3, CH.sub.2 F                    CHF.sub.2 FCF.sub.2 84      CF.sub.3, CH.sub.2 F                    CH.sub.2 F(CF.sub.2).sub.2 85      CF.sub.3, CH.sub.2 F                    CH.sub.2 FCF.sub.2 CHF 86      CF.sub.3, CH.sub.2 F                    CH.sub.2 FCF.sub.2 CH.sub.2 87      CF.sub.3, CH.sub.2 F                    CH.sub.2 FCHF 88      CF.sub.3, CH.sub.2 F                    CH.sub.2 (CHF).sub.2 89      CF.sub.3, CH.sub.2 F                    CH.sub.2 FCHFCF.sub.2 90      CF.sub.3, CH.sub.2 F                    CH.sub.2 FCHFCH.sub.2 91      CF.sub.3, CH.sub.2 F                    CH.sub.2 FCH.sub.2 92      CF.sub.3, CH.sub.2 F                    CH.sub.2 F(CH.sub.2).sub.2 93      CF.sub.3, CH.sub.2 F                    CH.sub.2 FCH.sub.2 CF.sub.2 94      CF.sub.3, CH.sub.2 F                    CH.sub.2 FCH.sub.2 CHF 95      CF.sub.3, CH.sub.2 F                    CH.sub.3 CF.sub.2 96      CF.sub.3, CH.sub.2 F                    CH.sub.3 (CF.sub.2).sub.2 97      CF.sub.3, CH.sub.2 F                    CH.sub.3 CF.sub.2 CHF 98      CF.sub.3, CH.sub.2 F                    CH.sub.3 CF.sub.2 CH.sub.2 99      CF.sub.3, CH.sub.2 F                    CH.sub.3 CHF100      CF.sub.3, CH.sub.2 F                    CH.sub.3 (CHF).sub.2101      CF.sub.3, CH.sub.2 F                    CH.sub.3 CHFCF.sub.2102      CF.sub.3, CH.sub.2 F                    CH.sub.3 CHFCH.sub.2103      CF.sub.3, CH.sub.2 F                    CH.sub.3 CH.sub.2 CF.sub.2104      CF.sub.3, CH.sub.2 F                    CH.sub.3 CH.sub.2 (CF.sub.2).sub.2105      CF.sub.3, CH.sub.2 F                    CH.sub.3 (CH.sub.2).sub.2 CF.sub.2106      CF.sub.3, CH.sub.2 F                    CH.sub.3 (CH.sub.2).sub.2 (CF.sub.2).sub.2107      CF.sub.3, CH.sub.2 F                    CH.sub.3 (CH.sub.2).sub.3 CF.sub.2108      CF.sub.3, CH.sub.2 F                    CH.sub.3 (CH.sub.2).sub.3 (CF.sub.2).sub.2109      CF.sub.3, CH.sub.3 CF.sub.2                    CF.sub.3110      CF.sub.3, CH.sub.3 CF.sub.2                    CHF.sub.2111      CF.sub.3, CH.sub.3 CF.sub.2                    CH.sub.2 F112      CF.sub.3, CH.sub.3 CF.sub.2                    CH.sub.3113      CF.sub.3, CH.sub.3 CF.sub.2                    CF.sub.3 CF.sub.2114      CF.sub.3, CH.sub.3 CF.sub.2                    CF.sub.3 (CF.sub.2).sub.2115      CF.sub.3, CH.sub.3 CF.sub.2                    CF.sub.3 CF.sub.2 CHF116      CF.sub.3, CH.sub.3 CF.sub.2                    CF.sub.3 CF.sub.2 CH.sub.2117      CF.sub.3, CH.sub.3 CF.sub.2                    CF.sub.3 CHF118      CF.sub.3, CH.sub.3 CF.sub.2                    CF.sub.3 (CHF).sub.2119      CF.sub.3, CH.sub.3 CF.sub.2                    CF.sub.3 CHFCF.sub.2120      CF.sub.3, CH.sub.3 CF.sub.2                    CF.sub.3 CHFCH.sub.2121      CF.sub.3, CH.sub.3 CF.sub.2                    CF.sub.3 CH.sub.2122      CF.sub.3, CH.sub.3 CF.sub.2                    CF.sub.3 (CH.sub.2).sub.2123      CF.sub.3, CH.sub.3 CF.sub.2                    CF.sub.3 CH.sub.2 CF.sub.2124      CF.sub.3, CH.sub.3 CF.sub.2                    CF.sub.3 CH.sub.2 CHF125      CF.sub.3, CH.sub.3 CF.sub.2                    CHF.sub.2 CF.sub.2126      CF.sub.3, CH.sub.3 CF.sub.2                    CHF.sub.2 (CF.sub.2).sub.2127      CF.sub.3, CH.sub.3 CF.sub.2                    CHF.sub.2 CF.sub.2 CHF128      CF.sub.3, CH.sub.3 CF.sub.2                    CHF.sub.2 CF.sub.2 CH.sub.2129      CF.sub.3, CH.sub.3 CF.sub.2                    CHF.sub.2 CHF130      CF.sub.3, CH.sub.3 CF.sub.2                    CHF.sub.2 (CHF).sub.2131      CF.sub.3, CH.sub.3 CF.sub.2                    CHF.sub.2 CHFCF.sub.2132      CF.sub.3, CH.sub.3 CF.sub.2                    CHF.sub.2 CHFCH.sub.2133      CF.sub.3, CH.sub.3 CF.sub.2                    CHF.sub.2 CH.sub.2134      CF.sub.3, CH.sub.3 CF.sub.2                    CHF.sub.2 (CH.sub.2).sub.2135      CF.sub.3, CH.sub.3 CF.sub.2                    CHF.sub.2 CH.sub.2 CF.sub.2136      CF.sub.3, CH.sub.3 CF.sub.2                    CHF.sub.2 CH.sub.2 CHF137      CF.sub.3, CH.sub.3 CF.sub.2                    CHF.sub.2 FCF.sub.2138      CF.sub.3, CH.sub.3 CF.sub.2                    CH.sub.2 F(CF.sub.2).sub.2139      CF.sub.3, CH.sub.3 CF.sub.2                    CH.sub.2 FCF.sub.2 CHF140      CF.sub.3, CH.sub.3 CF.sub.2                    CH.sub.2 FCF.sub.2 CH.sub.2141      CF.sub.3, CH.sub.3 CF.sub.2                    CH.sub.2 FCHF142      CF.sub.3, CH.sub.3 CF.sub.2                    CH.sub.2 F(CHF).sub.2143      CF.sub.3, CH.sub.3 CF.sub.2                    CH.sub.2 FCHFCF.sub.2144      CF.sub.3, CH.sub.3 CF.sub.2                    CH.sub.2 FCHFCH.sub.2145      CF.sub.3, CH.sub.3 CF.sub.2                    CH.sub.2 FCH.sub.2146      CF.sub.3, CH.sub.3 CF.sub.2                    CH.sub.2 F(CH.sub.2).sub.2147      CF.sub.3, CH.sub.3 CF.sub.2                    CH.sub.2 FCH.sub.2 CF.sub.2148      CF.sub.3, CH.sub.3 CF.sub.2                    CH.sub.2 FCH.sub.2 CHF149      CF.sub.3, CH.sub.3 CF.sub.2                    CH.sub.3 CF.sub.2150      CF.sub.3, CH.sub.3 CF.sub.2                    CH.sub.3 (CF.sub.2).sub.2151      CF.sub.3, CH.sub.3 CF.sub.2                    CH.sub.3 CF.sub.2 CHF152      CF.sub.3, CH.sub.3 CF.sub.2                    CH.sub.3 CF.sub.2 CH.sub.2153      CF.sub.3, CH.sub.3 CF.sub.2                    CH.sub.3 CHF154      CF.sub.3, CH.sub.3 CF.sub.2                    CH.sub.3 (CHF).sub.2155      CF.sub.3, CH.sub.3 CF.sub.2                    CH.sub.3 CHFCF.sub.2156      CF.sub.3, CH.sub.3 CF.sub.2                    CH.sub.3 CHFCH.sub.2157      CF.sub.3, CH.sub.3 CF.sub.2                    CH.sub.3 CH.sub.2 CF.sub.2158      CF.sub.3, CH.sub.3 CF.sub.2                    CH.sub.3 CH.sub.2 (CF.sub.2).sub. 2159      CF.sub.3, CH.sub.3 CF.sub.2                    CH.sub.3 (CH.sub.2).sub.2 CF.sub.2160      CF.sub.3, CH.sub.3 CF.sub.2                    CH.sub.3 (CH.sub.2).sub.2 (CF.sub.2).sub.2161      CF.sub.3, CH.sub.3 CF.sub.2                    CH.sub.3 (CH.sub.2).sub.3 CF.sub.2162      CF.sub.3, CH.sub.3 CF.sub.2                    CH.sub.3 (CH.sub.2).sub.3 (CF.sub.2).sub.2163      CHF.sub.2, CH.sub.2 F                    CF.sub.3164      CHF.sub.2, CH.sub.2 F                    CHF.sub.2165      CHF.sub.2, CH.sub.2 F                    CH.sub.2 F166      CHF.sub.2, CH.sub.2 F                    CH.sub.3167      CHF.sub.2, CH.sub.2 F                    CF.sub.3 CF.sub.2168      CHF.sub.2, CH.sub.2 F                    CF.sub.3 (CF.sub.2).sub.2169      CHF.sub.2, CH.sub.2 F                    CF.sub.3 CF.sub.2 CHF170      CHF.sub.2, CH.sub.2 F                    CF.sub.3 CF.sub.2 CH.sub.2171      CHF.sub.2, CH.sub.2 F                    CF.sub.3 CHF172      CHF.sub.2, CH.sub.2 F                    CF.sub.3 (CHF).sub.2173      CHF.sub.2, CH.sub.2 F                    CF.sub. 3 CHFCF.sub.2174      CHF.sub.2, CH.sub.2 F                    CF.sub.3 CHFCH.sub.2175      CHF.sub.2, CH.sub.2 F                    CF.sub.3 CH.sub.2176      CHF.sub.2, CH.sub.2 F                    CF.sub.3 (CH.sub.2).sub.2177      CHF.sub.2, CH.sub.2 F                    CF.sub.3 CH.sub.2 CF.sub.2178      CHF.sub.2, CH.sub.2 F                    CF.sub.3 CH.sub.2 CHF179      CHF.sub.2, CH.sub.2 F                    CHF.sub.2 CF.sub.2180      CHF.sub.2, CH.sub.2 F                    CHF.sub.2 (CF.sub.2).sub.2181      CHF.sub.2, CH.sub.2 F                    CHF.sub.2 CF.sub.2 CHF182      CHF.sub.2, CH.sub.2 F                    CHF.sub.2 CF.sub.2 CH.sub.2183      CHF.sub.2, CH.sub.2 F                    CHF.sub.2 CHF184      CHF.sub.2, CH.sub.2 F                    CHF.sub.2 (CHF).sub.2185      CHF.sub.2, CH.sub.2 F                    CHF.sub.2 CHFCF.sub.2186      CHF.sub.2, CH.sub.2 F                    CHF.sub.2 CHFCH.sub.2187      CHF.sub.2, CH.sub.2 F                    CHF.sub.2 CH.sub.2188      CHF.sub.2, CH.sub.2 F                    CHF.sub.2 (CH.sub.2).sub.2189      CHF.sub.2, CH.sub.2 F                    CHF.sub. 2 CH.sub.2 CF.sub.2190      CHF.sub.2, CH.sub.2 F                    CHF.sub.2 CH.sub.2 CHF191      CHF.sub.2, CH.sub.2 F                    CHF.sub.2 FCF.sub.2192      CHF.sub.2, CH.sub.2 F                    CH.sub.2 F(CF.sub.2).sub.2193      CHF.sub.2, CH.sub.2 F                    CH.sub.2 FCF.sub.2 CHF194      CHF.sub.2, CH.sub.2 F                    CH.sub.2 FCF.sub.2 CH.sub.2195      CHF.sub.2, CH.sub.2 F                    CH.sub.2 FCHF196      CHF.sub.2, CH.sub.2 F                    CH.sub.2 F(CHF).sub.2197      CHF.sub.2, CH.sub.2 F                    CH.sub.2 FCHFCF.sub.2198      CHF.sub.2, CH.sub.2 F                    CH.sub.2 FCHFCH.sub.2199      CHF.sub.2, CH.sub.2 F                    CH.sub.2 FCH.sub.2200      CHF.sub.2, CH.sub.2 F                    CH.sub.2 F(CH.sub.2).sub.2201      CHF.sub.2, CH.sub.2 F                    CH.sub.2 FCH.sub.2 CF.sub.2202      CHF.sub.2, CH.sub.2 F                    CH.sub.2 FCH.sub.2 CHF203      CHF.sub.2, CH.sub.2 F                    CH.sub.3 CF.sub.2204      CHF.sub.2, CH.sub.2 F                    CH.sub.3 (CF.sub.2).sub.2205      CHF.sub.2, CH.sub.2 F                    CH.sub.3 CF.sub.2 CHF206      CHF.sub.2, CH.sub.2 F                    CH.sub.3 CF.sub.2 CH.sub.2207      CHF.sub.2, CH.sub.2 F                    CH.sub.3 CHF208      CHF.sub.2, CH.sub.2 F                    CH.sub.3 (CHF).sub.2209      CHF.sub.2, CH.sub.2 F                    CH.sub.3 CHFCF.sub.2210      CHF.sub.2, CH.sub.2 F                    CH.sub.3 CHFCH.sub.2211      CHF.sub.2, CH.sub.2 F                    CH.sub.3 CH.sub.2 CF.sub.2212      CHF.sub.2, CH.sub.2 F                    CH.sub.3 CH.sub.2 (CF.sub.2).sub.2213      CHF.sub.2, CH.sub.2 F                    CH.sub.3 (CH.sub.2).sub.2 CF.sub.2214      CHF.sub.2, CH.sub.2 F                    CH.sub.3 (CH.sub.2).sub.2 (CF.sub.2).sub.2215      CHF.sub.2, CH.sub.2 F                    CH.sub.3 (CH.sub.2).sub.3 CF.sub.2216      CHF.sub.2, CH.sub.2 F                    CH.sub.3 (CH.sub.2).sub.3 (CF.sub.2).sub.2217      CHF.sub.2, CH.sub.3 CF.sub.2                    CF.sub.3218      CHF.sub.2, CH.sub.3 CF.sub.2                    CHF.sub.2219      CHF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.2 F220      CHF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.3221      CHF.sub.2, CH.sub.3 CF.sub.2                    CF.sub.3 CF.sub.2222      CHF.sub.2, CH.sub.3 CF.sub.2                    CF.sub.3 (CF.sub.2).sub.2223      CHF.sub.2, CH.sub.3 CF.sub.2                    CF.sub.3 CF.sub.2 CHF224      CHF.sub.2, CH.sub.3 CF.sub.2                    CF.sub.3 CF.sub.2 CH.sub.2225      CHF.sub.2, CH.sub.3 CF.sub.2                    CF.sub.3 CHF226      CHF.sub.2, CH.sub.3 CF.sub.2                    CF.sub.3 (CHF).sub.2227      CHF.sub.2, CH.sub.3 CF.sub.2                    CF.sub.3 CHFCF.sub.2228      CHF.sub.2, CH.sub.3 CF.sub.2                    CF.sub.3 CHFCH.sub.2229      CHF.sub.2, CH.sub.3 CF.sub.2                    CF.sub.3 CH.sub.2230      CHF.sub.2, CH.sub.3 CF.sub.2                    CF.sub.3 (CH.sub.2).sub.2231      CHF.sub.2, CH.sub.3 CF.sub.2                    CF.sub.3 CH.sub.2 CF.sub.2232      CHF.sub.2, CH.sub.3 CF.sub.2                    CF.sub.3 CH.sub.2 CHF233      CHF.sub.2, CH.sub.3 CF.sub.2                    CHF.sub.2 CF.sub.2234      CHF.sub.2, CH.sub.3 CF.sub.2                    CHF.sub.2 (CF.sub.2).sub.2235      CHF.sub.2, CH.sub.3 CF.sub.2                    CHF.sub.2 CF.sub.2 CHF236      CHF.sub.2, CH.sub.3 CF.sub.2                    CHF.sub.2 CF.sub.2 CH.sub.2237      CHF.sub.2, CH.sub.3 CF.sub.2                    CHF.sub.2 CHF238      CHF.sub.2, CH.sub.3 CF.sub.2                    CHF.sub.2 (CHF).sub.2239      CHF.sub.2, CH.sub.3 CF.sub.2                    CHF.sub.2 CHFCF.sub.2240      CHF.sub.2, CH.sub.3 CF.sub.2                    CHF.sub.2 CHFCH.sub.2241      CHF.sub.2, CH.sub.3 CF.sub.2                    CHF.sub.2 CH.sub.2242      CHF.sub.2, CH.sub.3 CF.sub.2                    CHF.sub.2 (CH.sub.2).sub.2243      CHF.sub.2, CH.sub.3 CF.sub.2                    CHF.sub.2 CH.sub.2 CF.sub.2244      CHF.sub.2, CH.sub.3 CF.sub.2                    CHF.sub.2 CH.sub.2 CHF245      CHF.sub.2, CH.sub.3 CF.sub.2                    CHF.sub.2 FCF.sub.2246      CHF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.2 F(CF.sub.2).sub.2247      CHF.sub.2, CH.sub.3 CF.sub.2                    CH.sub. 2 FCF.sub.2 CHF248      CHF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.2 FCF.sub.2 CH.sub.2249      CHF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.2 FCHF250      CHF.sub.2, CH.sub.3 CF.sub.2                    CHF.sub.2 (CHF).sub.2251      CHF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.2 FCHFCF.sub.2252      CHF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.2 FCHFCH.sub.2253      CHF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.2 FCH.sub.2254      CHF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.2 F(CH.sub.2).sub.2255      CHF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.2 FCH.sub.2 CF.sub.2256      CHF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.2 FCH.sub.2 CHF257      CHF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.3 CF.sub.2258      CHF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.3 (CF.sub.2).sub.2259      CHF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.3 CF.sub.2 CHF260      CHF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.3 CF.sub.2 CH.sub.2261      CHF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.3 CHF262      CHF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.3 (CHF).sub.2263      CHF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.3 CHFCF.sub.2264      CHF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.3 CHFCH.sub.2265      CHF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.3 CH.sub.2 CF.sub.2266      CHF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.3 CH.sub.2 (CF.sub.2).sub.2267      CHF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.3 (CH.sub.2).sub.2 CF.sub.2268      CHF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.3 (CH.sub.2).sub.2 (CF.sub.2).sub.2269      CHF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.3 (CH.sub.2).sub.3 CF.sub.2270      CHF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.3 (CH.sub.2).sub.3 (CF.sub.2).sub.2271      CH.sub.2 F, CH.sub.3 CF.sub.2                    CF.sub.3272      CH.sub.2 F, CH.sub.3 CF.sub.2                    CHF.sub.2273      CH.sub.2 F, CH.sub.3 CF.sub.2                    CH.sub.2 F274      CH.sub.2 F, CH.sub.3 CF.sub.2                    CH.sub.3275      CH.sub.2 F, CH.sub.3 CF.sub.2                    CF.sub.3 CF.sub.2276      CH.sub.2 F, CH.sub.3 CF.sub.2                    CF.sub.3 (CF.sub.2).sub.2277      CH.sub.2 F, CH.sub.3 CF.sub.2                    CF.sub.3 CF.sub.2 CHF278      CH.sub.2 F, CH.sub.3 CF.sub.2                    CF.sub.3 CF.sub.2 CH.sub.2279      CH.sub.2 F, CH.sub.3 CF.sub.2                    CF.sub.3 CHF280      CH.sub.2 F, CH.sub.3 CF.sub.2                    CF.sub.3 (CHF).sub.2281      CH.sub.2 F, CH.sub.3 CF.sub.2                    CF.sub.3 CHFCF.sub.2282      CH.sub.2 F, CH.sub.3 CF.sub.2                    CF.sub.3 CHFCH.sub.2283      CH.sub.2 F, CH.sub.3 CF.sub.2                    CF.sub.3 CH.sub.2284      CH.sub.2 F, CH.sub.3 CF.sub.2                    CF.sub.3 (CH.sub.2).sub.2285      CH.sub.2 F, CH.sub.3 CF.sub.2                    CF.sub.3 CH.sub.2 CF.sub.2286      CH.sub.2 F, CH.sub.3 CF.sub.2                    CF.sub.3 CH.sub.2 CHF287      CH.sub.2 F, CH.sub.3 CF.sub.2                    CHF.sub.2 CF.sub.2288      CH.sub.2 F, CH.sub.3 CF.sub.2                    CHF.sub.2 (CF.sub.2).sub.2289      CH.sub.2 F, CH.sub.3 CF.sub.2                    CHF.sub.2 CF.sub.2 CHF290      CH.sub.2 F, CH.sub.3 CF.sub.2                    CHF.sub.2 CF.sub.2 CH.sub.2291      CH.sub.2 F, CH.sub.3 CF.sub.2                    CHF.sub.2 CHF292      CH.sub.2 F, CH.sub.3 CF.sub.2                    CHF.sub.2 (CHF).sub.2293      CH.sub.2 F, CH.sub.3 CF.sub.2                    CHF.sub.2 CHFCF.sub.2294      CH.sub.2 F, CH.sub.3 CF.sub.2                    CHF.sub.2 CHFCH.sub.2295      CH.sub.2 F, CH.sub.3 CF.sub.2                    CHF.sub.2 CH.sub.2296      CH.sub.2 F, CH.sub.3 CF.sub.2                    CHF.sub.2 (CH.sub.2).sub.2297      CH.sub.2 F, CH.sub.3 CF.sub.2                    CHF.sub.2 CH.sub.2 CF.sub.2298      CH.sub.2 F, CH.sub.3 CF.sub.2                    CHF.sub.2 CH.sub.2 CHF299      CH.sub.2 F, CH.sub.3 CF.sub.2                    CHF.sub.2 FCF.sub.2300      CH.sub.2 F, CH.sub.3 CF.sub.2                    CH.sub.2 F(CF.sub.2).sub.2301      CH.sub.2 F, CH.sub.3 CF.sub.2                    CH.sub.2 FCF.sub.2 CHF302      CH.sub. 2 F, CH.sub.3 CF.sub.2                    CH.sub.2 FCF.sub.2 CH.sub.2303      CH.sub.2 F, CH.sub.3 CF.sub.2                    CH.sub.2 FCHF304      CH.sub.2 F, CH.sub.3 CF.sub.2                    CHF.sub.2 (CHF).sub.2305      CH.sub.2 F, CH.sub.3 CF.sub.2                    CH.sub.2 FCHFCF.sub.2306      CH.sub.2 F, CH.sub.3 CF.sub.2                    CH.sub.2 FCHFCH.sub.2307      CH.sub.2 F, CH.sub.3 CF.sub.2                    CH.sub.2 FCH.sub.2308      CH.sub.2 F, CH.sub.3 CF.sub.2                    CH.sub.2 F(CH.sub.2).sub.2309      CH.sub.2 F, CH.sub.3 CF.sub.2                    CH.sub.2 FCH.sub.2 CF.sub.2310      CH.sub.2 F, CH.sub.3 CF.sub.2                    CH.sub.2 FCH.sub.2 CHF311      CH.sub.2 F, CH.sub.3 CF.sub.2                    CH.sub.3 CF.sub.2312      CH.sub.2 F, CH.sub.3 CF.sub.2                    CH.sub.3 (CF.sub.2).sub.2313      CH.sub.2 F, CH.sub.3 CF.sub.2                    CH.sub.3 CF.sub.2 CHF314      CH.sub.2 F, CH.sub.3 CF.sub.2                    CH.sub.3 CF.sub.2 CH.sub.2315      CH.sub.2 F, CH.sub.3 CF.sub.2                    CH.sub.3 CHF316      CH.sub.2 F, CH.sub.3 CF.sub.2                    CH.sub.3 (CHF).sub.2317      CH.sub.2 F, CH.sub.3 CF.sub.2                    CH.sub.3 CHFCF.sub.2318      CH.sub.2 F, CH.sub.3 CF.sub.2                    CH.sub.3 CHFCH.sub.2319      CH.sub.2 F, CH.sub.3 CF.sub.2                    CH.sub.3 CH.sub.2 CF.sub.2320      CH.sub.2 F, CH.sub.3 CF.sub.2                    CH.sub.3 CH.sub.2 (CF.sub.2).sub.2321      CH.sub.2 F, CH.sub.3 CF.sub.2                    CH.sub.3 (CH.sub.2).sub.2 CF.sub.2322      CH.sub.2 F, CH.sub.3 CF.sub.2                    CH.sub.3 (CH.sub.2).sub.2 (CF.sub.2).sub.2323      CH.sub.2 F, CH.sub.3 CF.sub.2                    CH.sub.3 (CH.sub.2).sub.3 CF.sub.2324      CH.sub.2 F, CH.sub.3 CF.sub.2                    CH.sub.3 (CH.sub.2).sub.3 (CF.sub.2).sub.2325      CF.sub.3, CF.sub.3                    CF.sub.3326      CF.sub.3, CF.sub.3                    CHF.sub.2327      CF.sub.3, CF.sub.3                    CH.sub.2 F328      CF.sub.3, CF.sub.3                    CH.sub.3329      CF.sub.3, CF.sub.3                    CF.sub. 3 CF.sub.2330      CF.sub.3, CF.sub.3                    CF.sub.3 (CF.sub.2).sub.2331      CF.sub.3, CF.sub.3                    CF.sub.3 CF.sub.2 CHF332      CF.sub.3, CF.sub.3                    CF.sub.3 CF.sub.2 CH.sub.2333      CF.sub.3, CF.sub.3                    CF.sub.3 CHF334      CF.sub.3, CF.sub.3                    CF.sub.3 (CHF).sub.2335      CF.sub.3, CF.sub.3                    CF.sub.3 CHFCF.sub.2336      CF.sub.3, CF.sub.3                    CF.sub.3 CHFCH.sub.2337      CF.sub.3, CF.sub.3                    CF.sub.3 CH.sub.2338      CF.sub.3, CF.sub.3                    CF.sub.3 (CH.sub.2).sub.2339      CF.sub.3, CF.sub.3                    CF.sub.3 CH.sub.2 CF.sub.2340      CF.sub.3, CF.sub.3                    CF.sub.3 CH.sub.2 CHF341      CF.sub.3, CF.sub.3                    CHF.sub.2 CF.sub.2342      CF.sub.3, CF.sub.3                    CHF.sub.2 (CF.sub.2).sub.2343      CF.sub.3, CF.sub.3                    CHF.sub.2 CF.sub.2 CHF344      CF.sub.3, CF.sub.3                    CHF.sub.2 CF.sub.2 CH.sub.2345      CF.sub.3, CF.sub.3                    CHF.sub.2 CHF346      CF.sub.3, CF.sub.3                    CHF.sub.2 (CHF).sub.2347      CF.sub.3, CF.sub.3                    CHF.sub.2 CHFCF.sub.2348      CF.sub.3, CF.sub.3                    CHF.sub.2 CHFCH.sub.2349      CF.sub.3, CF.sub.3                    CHF.sub.2 CH.sub.2350      CF.sub.3, CF.sub.3                    CHF.sub.2 (CH.sub.2).sub.2351      CF.sub.3, CF.sub.3                    CHF.sub.2 CH.sub.2 CF.sub.2352      CF.sub.3, CF.sub.3                    CHF.sub.2 CH.sub.2 CHF353      CF.sub.3, CF.sub.3                    CHF.sub.2 FCF.sub.2354      CF.sub.3, CF.sub.3                    CH.sub.2 F(CF.sub.2).sub.2355      CF.sub.3, CF.sub.3                    CH.sub.2 FCF.sub.2 CHF356      CF.sub.3, CF.sub.3                    CH.sub.2 FCF.sub.2 CH.sub.2357      CF.sub.3, CF.sub.3                    CH.sub.2 FCHF358      CF.sub.3, CF.sub.3                    CHF.sub.2 (CHF).sub.2359      CF.sub.3, CF.sub.3                    CH.sub.2 FCHFCF.sub.2360      CF.sub.3, CF.sub.3                    CH.sub.2 FCHFCH.sub.2361      CF.sub.3, CF.sub.3                    CH.sub.2 FCH.sub. 2362      CF.sub.3, CF.sub.3                    CH.sub.2 F(CH.sub.2).sub.2363      CF.sub.3, CF.sub.3                    CH.sub.2 FCH.sub.2 CF.sub.2364      CF.sub.3, CF.sub.3                    CH.sub.2 FCH.sub.2 CHF365      CF.sub.3, CF.sub.3                    CH.sub.3 CF.sub.2366      CF.sub.3, CF.sub.3                    CH.sub.3 (CF.sub.2).sub.2367      CF.sub.3, CF.sub.3                    CH.sub.3 CF.sub.2 CHF368      CF.sub.3, CF.sub.3                    CH.sub.3 CF.sub.2 CH.sub.2369      CF.sub.3, CF.sub.3                    CH.sub.3 CHF370      CF.sub.3, CF.sub.3                    CH.sub.3 (CHF).sub.2371      CF.sub.3, CF.sub.3                    CH.sub.3 CHFCF.sub.2372      CF.sub.3, CF.sub.3                    CH.sub.3 CHFCH.sub.2373      CF.sub.3, CF.sub.3                    CH.sub.3 CH.sub.2 CF.sub.2374      CF.sub.3, CF.sub.3                    CH.sub.3 CH.sub.2 (CF.sub.2).sub.2375      CF.sub.3, CF.sub.3                    CH.sub.3 (CH.sub.2).sub.2 CF.sub.2376      CF.sub.3, CF.sub.3                    CH.sub.3 (CH.sub.2).sub.2 (CF.sub. 2).sub.2377      CF.sub.3, CF.sub.3                    CH.sub.3 (CH.sub.2).sub.3 CF.sub.2378      CF.sub.3, CF.sub.3                    CH.sub.3 (CH.sub.2).sub.3 (CF.sub.2).sub.2379      CHF.sub.2, CHF.sub.2                    CF.sub.3380      CHF.sub.2, CHF.sub.2                    CHF.sub.2381      CHF.sub.2, CHF.sub.2                    CH.sub.2 F382      CHF.sub.2, CHF.sub.2                    CH.sub.3383      CHF.sub.2, CHF.sub.2                    CF.sub.3 CF.sub.2384      CHF.sub.2, CHF.sub.2                    CF.sub.3 (CF.sub.2).sub.2385      CHF.sub.2, CHF.sub.2                    CF.sub.3 CF.sub.2 CHF386      CHF.sub.2, CHF.sub.2                    CF.sub.3 CF.sub.2 CH.sub.2387      CHF.sub.2, CHF.sub.2                    CF.sub.3 CHF388      CHF.sub.2, CHF.sub.2                    CF.sub.3 (CHF).sub.2389      CHF.sub.2, CHF.sub.2                    CF.sub.3 CHFCF.sub.2390      CHF.sub.2, CHF.sub.2                    CF.sub.3 CHFCH.sub.2391      CHF.sub.2, CHF.sub.2                    CF.sub.3 CH.sub.2392      CHF.sub.2, CHF.sub.2                    CF.sub.3 (CH.sub.2).sub. 2393      CHF.sub.2, CHF.sub.2                    CF.sub.3 CH.sub.2 CF.sub.2394      CHF.sub.2, CHF.sub.2                    CF.sub.3 CH.sub.2 CHF395      CHF.sub.2, CHF.sub.2                    CHF.sub.2 CF.sub.2396      CHF.sub.2, CHF.sub.2                    CHF.sub.2 (CF.sub.2).sub.2397      CHF.sub.2, CHF.sub.2                    CHF.sub.2 CF.sub.2 CHF398      CHF.sub.2, CHF.sub.2                    CHF.sub.2 CF.sub.2 CH.sub.2399      CHF.sub.2, CHF.sub.2                    CHF.sub.2 CHF400      CHF.sub.2, CHF.sub.2                    CHF.sub.2 (CHF).sub.2401      CHF.sub.2, CHF.sub.2                    CHF.sub.2 CHFCF.sub.2402      CHF.sub.2, CHF.sub.2                    CHF.sub.2 CHFCH.sub.2403      CHF.sub.2, CHF.sub.2                    CHF.sub.2 CH.sub.2404      CHF.sub.2, CHF.sub.2                    CHF.sub.2 (CH.sub.2).sub.2405      CHF.sub.2, CHF.sub.2                    CHF.sub.2 CH.sub.2 CF.sub.2406      CHF.sub.2, CHF.sub.2                    CHF.sub.2 CH.sub.2 CHF407      CHF.sub.2, CHF.sub.2                    CHF.sub.2 FCF.sub.2408      CHF.sub.2, CHF.sub.2                    CH.sub.2 F(CF.sub. 2).sub.2409      CHF.sub.2, CHF.sub.2                    CH.sub.2 FCF.sub.2 CHF410      CHF.sub.2, CHF.sub.2                    CH.sub.2 FCF.sub.2 CH.sub.2411      CHF.sub.2, CHF.sub.2                    CH.sub.2 FCHF412      CHF.sub.2, CHF.sub.2                    CHF.sub.2 (CHF).sub.2413      CHF.sub.2, CHF.sub.2                    CH.sub.2 FCHFCF.sub.2414      CHF.sub.2, CHF.sub.2                    CH.sub.2 FCHFCH.sub.2415      CHF.sub.2, CHF.sub.2                    CH.sub.2 FCH.sub.2416      CHF.sub.2, CHF.sub.2                    CH.sub.2 F(CH.sub.2).sub.2417      CHF.sub.2, CHF.sub.2                    CH.sub.2 FCH.sub.2 CF.sub.2418      CHF.sub.2, CHF.sub.2                    CH.sub.2 FCH.sub.2 CHF419      CHF.sub.2, CHF.sub.2                    CH.sub.3 CF.sub.2420      CHF.sub.2, CHF.sub.2                    CH.sub.3 (CF.sub.2).sub.2421      CHF.sub.2, CHF.sub.2                    CH.sub.3 CF.sub.2 CHF422      CHF.sub.2, CHF.sub.2                    CH.sub.3 CF.sub.2 CH.sub.2423      CHF.sub.2, CHF.sub.2                    CH.sub.3 CHF424      CHF.sub.2, CHF.sub.2                    CH.sub.3 (CHF).sub. 2425      CHF.sub.2, CHF.sub.2                    CH.sub.3 CHFCF.sub.2426      CHF.sub.2, CHF.sub.2                    CH.sub.3 CHFCH.sub.2427      CHF.sub.2, CHF.sub.2                    CH.sub.3 CH.sub.2 CF.sub.2428      CHF.sub.2, CHF.sub.2                    CH.sub.3 CH.sub.2 (CF.sub.2).sub.2429      CHF.sub.2, CHF.sub.2                    CH.sub.3 (CH.sub.2).sub.2 CF.sub.2430      CHF.sub.2, CHF.sub.2                    CH.sub.3 (CH.sub.2).sub.2 (CF.sub.2).sub.2431      CHF.sub.2, CHF.sub.2                    CH.sub.3 (CH.sub.2).sub.3 CF.sub.2432      CHF.sub.2, CHF.sub.2                    CH.sub.3 (CH.sub.2).sub.3 (CF.sub.2).sub.2433      CH.sub.2, CHF.sub.2 F                    CF.sub.3434      CH.sub.2, CHF.sub.2 F                    CHF.sub.2435      CH.sub.2, CHF.sub.2 F                    CH.sub.2 F436      CH.sub.2, CHF.sub.2 F                    CH.sub.3437      CH.sub.2, CHF.sub.2 F                    CF.sub.3 CF.sub.2438      CH.sub.2, CHF.sub.2 F                    CF.sub.3 (CF.sub.2).sub.2439      CH.sub.2, CHF.sub.2 F                    CF.sub.3 CF.sub. 2 CHF440      CH.sub.2, CHF.sub.2 F                    CF.sub.3 CF.sub.2 CH.sub.2441      CH.sub.2, CHF.sub.2 F                    CF.sub.3 CHF442      CH.sub.2, CHF.sub.2 F                    CF.sub.3 (CHF).sub.2443      CH.sub.2, CHF.sub.2 F                    CF.sub.3 CHFCF.sub.2444      CH.sub.2, CHF.sub.2 F                    CF.sub.3 CHFCH.sub.2445      CH.sub.2, CHF.sub.2 F                    CF.sub.3 CH.sub.2446      CH.sub.2, CHF.sub.2 F                    CF.sub.3 (CH.sub.2).sub.2447      CH.sub.2, CHF.sub.2 F                    CF.sub.3 CH.sub.2 CF.sub.2448      CH.sub.2, CHF.sub.2 F                    CF.sub.3 CH.sub.2 CHF449      CH.sub.2, CHF.sub.2 F                    CHF.sub.2 CF.sub.2450      CH.sub.2, CHF.sub.2 F                    CHF.sub.2 (CF.sub.2).sub.2451      CH.sub.2, CHF.sub.2 F                    CHF.sub.2 CF.sub.2 CHF452      CH.sub.2, CHF.sub.2 F                    CHF.sub.2 CF.sub.2 CH.sub.2453      CH.sub.2, CHF.sub.2 F                    CHF.sub.2 CHF454      CH.sub.2, CHF.sub.2 F                    CHF.sub.2 (CHF).sub.2455      CH.sub.2, CHF.sub.2 F                    CHF.sub.2 CHFCF.sub.2456      CH.sub.2, CHF.sub.2 F                    CHF.sub.2 CHFCH.sub.2457      CH.sub.2, CHF.sub.2 F                    CHF.sub.2 CH.sub.2458      CH.sub.2, CHF.sub.2 F                    CHF.sub.2 (CH.sub.2).sub.2459      CH.sub.2, CHF.sub.2 F                    CHF.sub.2 CH.sub.2 CF.sub.2460      CH.sub.2, CHF.sub.2 F                    CHF.sub.2 CH.sub.2 CHF461      CH.sub.2, CHF.sub.2 F                    CHF.sub.2 FCF.sub.2462      CH.sub.2, CHF.sub.2 F                    CH.sub.2 F(CF.sub.2).sub.2463      CH.sub.2, CHF.sub.2 F                    CH.sub.2 FCF.sub.2 CHF464      CH.sub.2, CHF.sub.2 F                    CH.sub.2 FCF.sub.2 CH.sub.2465      CH.sub.2, CHF.sub.2 F                    CH.sub.2 FCHF466      CH.sub.2, CHF.sub.2 F                    CHF.sub.2 (CHF).sub.2467      CH.sub.2, CHF.sub.2 F                    CH.sub.2 FCHFCF.sub.2468      CH.sub.2, CHF.sub.2 F                    CH.sub.2 FCHFCH.sub.2469      CH.sub.2, CHF.sub.2 F                    CH.sub.2 FCH.sub.2470      CH.sub.2, CHF.sub.2 F                    CH.sub.2 F(CH.sub.2).sub.2471      CH.sub.2, CHF.sub.2 F                    CH.sub.2 FCH.sub.2 CF.sub. 2472      CH.sub.2, CHF.sub.2 F                    CH.sub.2 FCH.sub.2 CHF473      CH.sub.2, CHF.sub.2 F                    CH.sub.3 CF.sub.2474      CH.sub.2, CHF.sub.2 F                    CH.sub.3 (CF.sub.2).sub.2475      CH.sub.2, CHF.sub.2 F                    CH.sub.3 CF.sub.2 CHF476      CH.sub.2, CHF.sub.2 F                    CH.sub.3 CF.sub.2 CH.sub.2477      CH.sub.2, CHF.sub.2 F                    CH.sub.3 CHF478      CH.sub.2, CHF.sub.2 F                    CH.sub.3 (CHF).sub.2479      CH.sub.2, CHF.sub.2 F                    CH.sub.3 CHFCF.sub.2480      CH.sub.2, CHF.sub.2 F                    CH.sub.3 CHFCH.sub.2481      CH.sub.2, CHF.sub.2 F                    CH.sub.3 CH.sub.2 CF.sub.2482      CH.sub.2, CHF.sub.2 F                    CH.sub.3 CH.sub.2 (CF.sub.2).sub.2483      CH.sub.2, CHF.sub.2 F                    CH.sub.3 (CH.sub.2).sub.2 CF.sub.2484      CH.sub.2, CHF.sub.2 F                    CH.sub.3 (CH.sub.2).sub.2 (CF.sub.2).sub.2485      CH.sub.2, CHF.sub.2 F                    CH.sub.3 (CH.sub.2).sub.3 CF.sub.2486      CH.sub.2, CHF.sub.2 F                    CH.sub. 3 (CH.sub.2).sub.3 (CF.sub.2).sub.2487      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CF.sub.3488      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CHF.sub.2489      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.2 F490      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.3491      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CF.sub.3 CF.sub.2492      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CF.sub.3 (CF.sub.2).sub.2493      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CF.sub.3 CF.sub.2 CHF494      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CF.sub.3 CF.sub.2 CH.sub.2495      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CF.sub.3 CHF496      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CF.sub.3 (CHF).sub.2497      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CF.sub.3 CHFCF.sub.2498      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CF.sub.3 CHFCH.sub.2499      CH.sub.3 CF.sub. 2, CH.sub.3 CF.sub.2                    CF.sub.3 CH.sub.2500      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CF.sub.3 (CH.sub.2).sub.2501      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CF.sub.3 CH.sub.2 CF.sub.2502      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CF.sub.3 CH.sub.2 CHF503      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CHF.sub.2 CF.sub.2504      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CHF.sub.2 (CF.sub.2).sub.2505      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CHF.sub.2 CF.sub.2 CHF506      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CHF.sub.2 CF.sub.2 CH.sub.2507      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CHF.sub.2 CHF508      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CHF.sub.2 (CHF).sub.2509      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CHF.sub.2 CHFCF.sub.2510      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CHF.sub.2 CHFCH.sub.2511      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CHF.sub.2 CH.sub.2512      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CHF.sub.2 (CH.sub.2).sub.2513      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CHF.sub.2 CH.sub.2 CF.sub.2514      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CHF.sub.2 CH.sub.2 CHF515      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CHF.sub.2 FCF.sub.2516      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.2 F(CF.sub.2).sub.2517      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.2 FCF.sub.2 CHF518      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.2 FCF.sub.2 CH.sub.2519      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.2 FCHF520      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CHF.sub.2 (CHF).sub.2521      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.2 FCHFCF.sub.2522      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.2 FCHFCH.sub.2523      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.2 FCH.sub.2524      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.2 F(CH.sub.2).sub.2525      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.2 FCH.sub.2 CF.sub.2526      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.2 FCH.sub.2 CHF527      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.3 CF.sub.2528      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.3 (CF.sub.2).sub.2529      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.3 CF.sub.2 CHF530      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.3 CF.sub.2 CH.sub.2531      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.3 CHF532      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.3 (CHF).sub.2533      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.3 CHFCF.sub.2534      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.3 CHFCH.sub.2535      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.3 CH.sub.2 CF.sub.2536      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.3 CH.sub.2 (CF.sub.2).sub.2537      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.3 (CH.sub.2).sub.2 CF.sub.2538      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.3 (CH.sub.2).sub.2 (CF.sub.2).sub.2539      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.3 (CH.sub.2).sub.3 CF.sub.2540      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.3 (CH.sub.2).sub.3 (CF.sub.2).sub.2541      CF.sub.3, CF.sub.3                    CF.sub.3542      CF.sub.3, CF.sub.3                    CF.sub.3 CF.sub.2543      CF.sub.3, CF.sub.3                    CF.sub.3 (CF.sub.2).sub.2544      CF.sub.3, CHF.sub.2                    CH.sub.3 CH.sub.2545      CF.sub.3, CHF.sub.2                    CH.sub.3 (CH.sub.2).sub.2546      CF.sub.3, CHF.sub.2                    CH.sub.3 (CH.sub.2).sub.3547      CF.sub.3, CH.sub.2 F                    CH.sub.3 CH.sub.3548      CF.sub.3, CH.sub.2 F                    CH.sub.3 (CH.sub.2).sub.2549      CF.sub.3, CH.sub.2 F                    CH.sub.3 (CH.sub.2).sub.3550      CF.sub.3, CH.sub.3 CF.sub.2                    CH.sub.3 CH.sub.2551      CF.sub.3, CH.sub.3 CF.sub.2                    CH.sub.3 (CH.sub.2).sub.2552      CF.sub.3, CH.sub.3 CF.sub.2                    CH.sub.3 (CH.sub.2).sub.3553      CHF.sub.2, CH.sub.2 F                    CH.sub.3 CH.sub.2554      CHF.sub.2, CH.sub.2 F                    CH.sub.3 (CH.sub.2).sub.2555      CHF.sub.2, CH.sub.2 F                    CH.sub.3 (CH.sub.2).sub.3556      CHF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.3 CH.sub.2557      CHF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.3 (CH.sub.2).sub.2558      CHF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.3 (CH.sub.2).sub.3559      CH.sub.2 F, CH.sub.3 CF.sub.2                    CH.sub.3 CH.sub.2560      CH.sub.2 F, CH.sub.3 CF.sub.2                    CH.sub.3 (CH.sub.2).sub.2561      CH.sub.2 F, CH.sub.3 CF.sub.2                    CH.sub. 3 (CH.sub.2).sub.3562      CF.sub.3, CF.sub.3                    CH.sub.3 CH.sub.2563      CF.sub.3, CF.sub.3                    CH.sub.3 (CH.sub.2).sub.2564      CF.sub.3, CF.sub.3                    CH.sub.3 (CH.sub.2).sub.3565      CHF.sub.2, CHF.sub.2                    CH.sub.3 CH.sub.2566      CHF.sub.2, CHF.sub.2                    CH.sub.3 (CH.sub.2).sub.2567      CHF.sub.2, CHF.sub.2                    CH.sub.3 (CH.sub.2).sub.3568      CH.sub.2 F, CH.sub.2 F                    CH.sub.3 CH.sub.2569      CH.sub.2 F, CH.sub.2 F                    CH.sub.3 (CH.sub.2).sub.2570      CH.sub.2 F, CH.sub.2 F                    CH.sub.3 (CH.sub.2).sub.3571      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.3 CH.sub.2572      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.3 (CH.sub.2).sub.2573      CH.sub.3 CF.sub.2, CH.sub.3 CF.sub.2                    CH.sub.3 (CH.sub.2).sub.3______________________________________ 
    
     EXAMPLES 574-1,146 
     Metal coupons are soiled with various types of oil. The soiled metal coupons are immersed in the novel solvents of Table I above for a period of 15 seconds to 2 minutes, removed, and allowed to air dry. Upon visual inspection, the soil appears to be substantially removed. 
     EXAMPLES 1,147-1,719 
     Metal coupons are soiled with various types of oil. The soiled metal coupons are wiped with the novel solvents of Table I above and allowed to air dry. Upon visual inspection, the soil appears to be substantially removed. 
     Having described the invention in detail and by reference to preferred embodiments thereof, it will be apparent that modifications and variations are possible without departing from the scope of the invention defined in the appended claims.