bluuebunny/crossref_metadata_2025_split huggingface dataset:
A Calorimetric Study on the Relative Thermal Stability of Some Bis(diamine)cobalt(III) Complexes in a Solid Phase
Authors: Tsuchiya Ryokichi , Uehara Akira , Wazumi Toshio , Muramatsu Yoshinori 
Published: July 2006

Abstract
The enthalpy changes (ΔH) in the reaction of trans-[CoX2(AA)2]X·mHX·nH2O-type complexes with an alkaline sodium sulfide solution were calorimetrically measured at 25 °C, where AA is diamine and X is Cl−, Br−, or ClO4−; m=0 or 1, and n=0, 0.5, 1, or 2. The thermal stabilities were found to decrease in the following orders for both dichloro and dibromo complexes: 1,2-ethanediamine&gt;l- or d-1,2-propanediamine&gt;racemic 1,2-propanediamine,d,l-2,3-butanediamine&gt;meso-2,3-butanediamine&gt;2-methyl-1,2-propanediamine, 1,2-ethanediamine&gt;1,3-propanediamine, and meso-2,4-pentanediamine&gt;d,l-2,4-pentanediamine. The complexes containing six-membered diamine chelate rings were less stable than those containing five-membered diamine chelate rings. The dibromo complex bromides were less stable than the corresponding dichloro complex chlorides.
The Affinity for Carbon Monoxide, Electrochemical and Spectral Properties of Binuclear Copper(I) Complexes
Authors: Kitagawa Susumu , Munakata Megumu , Miyaji Noboru 
Published: July 2006

Abstract
Binuclear copper(I) complexes [CuXL]2(X=Cl− and I−; L=2,2′-bipyridine, 1,10-phenanthroline, and their derivatives) have been synthesized in acetone, which react with CO reversibly to give crystalline carbonyl adducts [Cu2X2L2(CO)]. The cyclic voltammograms of [CuXL]2 and [Cu2X2L2(CO)] show two couples of coppercentered oxidation-reduction waves, indicative of binuclear structure. One couple of waves in [Cu2X2L2(CO)] alone shifts to the anodic region, exhibiting the formation of monocarbonylated complexes. All the half-wave potentials are primarily governed by the basicity of a ligand L, and the contribution of a coordinated CO to the stabilization of CuI state by π back-bonding is found. The equilibrium constants of the reaction, [CuXL]2+CO\oversetKco\ightleftharpoons[Cu2X2L2(CO)], are lowered with the decrease in the transition energy of the ligand←metal charge transfer of [CuXL]2. On this basis, it is concluded that CO competes with L concerning π back-bonding with copper(I). The νco values of the coordinated CO exhibit apparent L-dependence, which is accounted for by the competition between Cu–L and Cu–CO π-bonding, and hence, νco values are useful probe to inquire into the nature of Cu–CO bonding among these copper(I) complexes.
Immunoassay Using a Metal-complex Compound as a Chemiluminescent Catalyst. I. Iron(III)phthalocyanine as a Labeling Reagent
Authors: Hara Tadashi , Toriyama Motohiro , Tsukagoshi Kazuhiko 
Published: July 2006

Abstract
A synthesized metal-complex compound with catalytic activity for a chemiluminescence reaction has been used for the first time as a labeling reagent for immunoassay. Several complex compounds of iron(III) and cobalt(II) were synthesized, and their catalytic activities for the chemiluminescence reaction between 5-amino-2,3-dihydro-1,4-phthalazinedione (luminol) and hydrogen peroxide (H2O2) were examined. Iron(III) 4,11,18,25-tetracarboxyphthalocyanine (TCP-Fe(III)) showed the highest catalytic activity. The immunoassay of free albumin was carried out by a competitive method using albumin labeled with TCP–Fe(III) by means of the carbodiimide method; free albumin in the range of 2 to 1000 μg/tube could be determined with a coefficient of variation of from 6 to 16% in 5 analyses.
An Improved Preparation and Characterization of Tetrahedral CoII and CoIII Complexes with Dodecatungstate as the Tetrahedral Ligand
Authors: Nomiya Kenji , Kobayashi Ryoichi , Miwa Makoto 
Published: July 2006

Abstract
Tetrabutylammonium salt of the 12-tungstoheteropolyanion with central CoII as the heteroatom in a tetrahedral oxygen environment, [CoIIW12O40]6−, has been prepared by an improved manner. This manner remarkably shortens the total time needed for preparation, especially the time for purification, and gives a compound of a high purity. The corresponding CoIII compound has been obtained by oxidation with potassium peroxodisulfate from the potassium salt of the CoII compound; its spectroscopic data (IR, near-infrared, UV-vis, and MCD) are presented.
Hydration of Iodide Ions in Nitrobenzene from Charge-transfer-to-solvent Spectra and 1HNMR
Authors: Ito Kazuaki , Iwamoto Etsuro , Yamamoto Yuroku 
Published: July 2006

Abstract
The charge-transfer-to-solvent (c.t.t.s.) spectrum of the iodide ion in nitrobenzene was observed in the visible region, the intensity of the spectrum being lowered by addition of a small amount of water to the solution. From the spectral changes, the first, second, and third hydration constants, K1=3.5, K2=2.6, and K3=1.4 (mol−1 dm3) were determined. On the basis of 1H NMR of water in nitrobenzene solutions in conjunction with the hydration constants obtained from the spectra, it was suggested that a fraction of the water molecules bound to the iodide ion is hydrogen bonded to each other.
Photochemically Induced Orthometalations. Isolation of (

Remark: Graphics omitted.

), (

Remark: Graphics omitted.

), and (

Remark: Graphics omitted.

) from RMn(CO)3[P(OPh)3]2(R=CH3 and H) and MeMn(CO)4P(OPh)3
Authors: Onaka Satoru , Kondo Yoshinori , Furuichi Nobuhiro 
Published: July 2006

Abstract
Photochemical reactions of RMn(CO)3L2 (R=H and CH3; L=P(OC6H5)3) and CH3Mn(CO)4L in benzene gave several kinds of orthometalated products, (Remark: Graphics omitted.) (x=0, 1, and 2). The reactions have been shown to proceed via ligand dissociation, CO and/or L, from the parent compounds and the resulting 16-electron intermediates activate a C–H bond of phenyl groups in triphenyl phosphite intramolecularly to yield orthometalated products. The results of photochemical reactions for MeMn(CO)3L2 and MeMn(CO)4L are compared with those of thermal reactions for these compounds. HMn(CO)4L was left intact by photochemical and thermal reactions.
Synthesis of 2-(4-Azulenyl)ethanamine Derivatives as a Nonbenzenoid Analog of Biogenic Amine
Authors: Kurokawa Shinji 
Published: July 2006

Abstract
2-(4-Azulenyl)ethanamine derivatives, nonbenzenoid analogs of the biologically active amine, were synthesized by the action of methyleneammonium salts on sodium 4-methylazulenide, sodium 4,6,8-trimethylazulenide, and sodium guaiazulenide. These compounds, as well as their hydrochlorides, were characterized by UV, IR, 1H NMR, 13C NMR, and MS data. The reaction of sodium guaiazulenide and N-ethylidenemethylamine also yielded the corresponding 2-(4-azulenyl)ethanamine derivatives, but the low yield of the product showed that the electrophilicity of azomethine carbon atom to 4-methylene carbanion was insufficient. The enzyme activity for some of those products was investigated. Negligible effect was found on prostaglandin 15-hydroxydehydrogenase, and considerable inhibition to cyclic AMP-phosphodiesterase, in vitro.
Synthetic Studies on the Validamycins. VII. Synthesis of Dl-2-Deoxyhydroxyvalidamine and Dl-2-Deoxyvalienamine
Authors: Ogawa Seiichiro , Ito Hiroyuki , Ogawa Takao , Iwasaki Shinichi , Suami Tetsuo 
Published: July 2006

Abstract
Synthesis of the 2-deoxy analogs of Dl-hydroxyvalidamine and Dl-valienamine starting from Dl-1,2-di-O-acetyl-(1,3,5/2)-5-bromo-3-bromomethyl-1,2-cyclohexanediol is described.
A Basic Study of the Amino Acid Residue in Protein. The Molecular Interaction Responsible for the Differentiation of Hydrocarbon Residues
Authors: Hiraki Yuji , Oda Toshihiko , Tai Akira 
Published: July 2006

Abstract
A pair of primary amines was competitively acylated with acid anhydride in water–dioxane mixed solvents. Based on the product distribution, the mode of differentiation of hydrocarbon residues in the competing substrates with a reagent was studied. In solvents with a low water content, where both reactants and products were completely soluble, no appreciable differentiation of the alkyl-chain length of alkylamines occurred. On the other hand, the differentiation of a phenyl group from an alkyl group occurred. From the dependency of the product distribution on the water content in reaction media, an attractive interaction induced by water was postulated between alkyl and phenyl groups, but no such interaction was observed between alkyl and alkyl groups. The differences in functions of the phenyl and alkyl groups in the differentiation process are discussed. In solvents with a very high water content, the acylation proceeded under heterogeneous conditions, since acid anhydrides became insoluble and provided an organic phase in the reaction mixture. In this case, the differentiation was controlled by the hydrophobicity of hydrocarbon residues of amines indexed by the partition coefficients of amines between the aqueous phase and the organic phase.
Ionic Composition of Micelles and the Dissolved State of the Mixed Surfactant Solutions of Calcium and Sodium Decyl Sulfates
Authors: Koshinuma Masakatsu 
Published: July 2006

Abstract
Single activities of the decyl sulfate (DeS−), the calcium (Ca2+), and the sodium (Na+) ions in mixed surfactant solutions of varying mole ratios (Rm=Ca(DeS)2/NaDeS) were obtained at 30±1 °C by means of three kinds of EMF cells with ion-exchange membranes or Na+-selective electrode. The results showed that with increasing concentrations above the cmc, the activity of the DeS− decreases gradually, while that of the Na+ increased linearly; the activity of the Ca2+ remained nearly constant in the solution of Rm=2, but it showed a minimum in the solutions of Rm=1, 0.5 and 0.2. From these activities, the counterion attachments of the Ca2+(rCa) and the Na+(rNa) and the degree of micellar charge (1−2rCa−rNa) were obtained. With increasing concentration, rCa diminished gradually and approached a constant value, while rNa and 1−2rCa−rNa changed reversely except in the solution of Rm=2 where they were nearly constant. The Ca2+ was bound preferentially to the micelle surface. The Na+, which almost diffused away for the solution of Rm=2, bound increasingly to lessen the electrical potential of the micelle as Rm decreased. The specific adsorption potentials and the electrical free energies of transfer of Ca2+ and Na+ from solution to micelle were calculated as 1.7 and −18.4 kJ mol−1, and 1.1 and −14.3 kJ mol−1 respectively at their cmcs. It was showed clearly that little dehydration from the counterion occured and the coulombic interaction played an important role in the counterion binding.
Reactions of NH Radicals. II. Photolysis of HN3 in the Presence of C2H6 at 313 nm
Authors: Kodama Sukeya 
Published: July 2006

Abstract
Photolysis of HN3 vapor with C2H6 was studied at 313 nm and 30 °C. The products are N2, H2, CH4, NH4N3, CH3NH2·HN3, C2H5NH2·HN3, CH3N3, and CH3CN. The quantum yields of these products were measured as a function of pressures of HN3 and C2H6, and the light intensity. The following mechanism for the main reactions was proposed: HN3+hν(313 nm)→N2+NH(a1Δ); NH(a1Δ)+HN3→2N2+2H (2a); NH(a1Δ)+HN3→NH2+N3 (2b); NH(a1Δ)+HN3→N2+N2H2* (2c); NH(a1Δ)+C2H6→C2H5NH2* (3); NH(a1Δ)+C2H6→NH(X3Σ−)+C2H6 (4); C2H5NH2*→CH3+CH2NH2 (5); C2H5NH2*→CH3CN+2H2 (6); C2H5NH2*+M→C2H5NH2+M (7). The rate constant ratios at 30 °C are: k3⁄k2=0.334; k4⁄k2=0.217; k6⁄k5=0.038. The values of k7⁄k5 for C2H6, HN3, CO2, and Xe are 36.5, 30.3, 29.0, and 14.5 dm3 mol−1, respectively. The values of k5=9.8×109 s−1, k6=3.7×108 s−1, τ (half life of C2H5NH2*)=6.8×10−11 s, η (collisional deactivation efficiency of C2H5NH2*)=1 for C2H6, HN3, and CO2, and η=0.60 for Xe were obtained by using the collision theory.
Reactions of NH Radicals. III. Photolysis of HN3 in the Presence of C2H4 at 313 nm
Authors: Kodama Sukeya 
Published: July 2006

Abstract
Photolysis of HN3 vapor in the presence of C2H4 was studied at 313 nm and 30 °C. The main products were N2, H2, CH4, C2H6, NH4N3, C2H5N·HN3 (salt of C2H5N (azomethines) with HN3), HCN, CH3CN, CH3N3, and C2H5N3. The quantum yields of these products were measured as a function of the light intensity and pressures of HN3 and C2H4. The following mechanism for the main reactions was infered: HN3+hν(313 nm)→NH(a1Δ)+N2; NH(a1Δ)+HN3→2N2+2H (2a); NH(a1Δ)+HN3→NH2+N3 (2b); NH(a1Δ)+HN3→N2+N2H2* (2c); NH(a1Δ)+C2H4→C2H5N* (aziridine and vinylamine) (3); C2H5N*→CH3+CH2N (4); C2H5N*→H2+CH3CN (5); C2H5N*→H+C2H4N (6); C2H5N*→C2H3+NH2 (7). The rate constant ratios at 30 °C are: k3⁄k2=1.64; k5⁄k4=0.102; k6⁄k4=0.564; k7⁄k4=0.734. The collisional deactivation from NH(a1Δ) to NH(X3Σ−) by C2H4 was not found. The lifetime of C2H5N* is much shorter than 6.8×10−11 s for C2H5NH2*(←NH(a1Δ)+C2H6). The relative and absolute rates for the reactions of NH(a1Δ) with HN3, Xe, C2H6, and C2H4 are discussed.
Kinetics of Gas Phase Addition Reactions of Trichlorosilyl Radicals. VIII. Reinvestigation of Addition to Ethylene
Authors: Dohmaru Takaaki , Nagata Yoshio 
Published: July 2006

Abstract
The addition of ·SiCl3 radicals to ethylene has been reinvestigated using a large conversion method. The amended values are log(k3⁄k5)=−0.17±0.05−(0.80±0.10) kcal mol−1/2.303 RT and log{k−5⁄k6(mol cm−3)}=3.4±0.3−(22.5±0.7) kcal mol−1/2.303 RT where the reactions involved are ·SiCl3+CH3COCH3\overset3→(CH3)2\dotCOSiCl3, ·SiCl3+C2H4\overset5\underset−5\ightleftarrows·CH2CH2SiCl3 and ·CH2CH2SiCl3+HSiCl3\overset6→C2H5SiCl3+·SiCl3.
Circular Dichroism Spectra and Absolute Configurations of fac(NH3)-[Co(a)(gly)(NH3)3]n+-type Complexes
Authors: Fujinami Shuhei , Hattori Akihiko , Shibata Muraji 
Published: July 2006

Abstract
Four complexes [Co(a)(gly)(NH3)3]+ (a=CN−, NO2−, NCS−, and N3−) and a related [Co(NO2)(β-ala)(NH3)3]+ complex have been prepared; they were characterized by the absorption spectra in the ultraviolet region. The fac(NH3) isomers of these complexes have been optically resolved by column chromatography. The CD spectra of fac(NH3)-[Co(H2O)(gly)(NH3)3]2+ and fac(NH3)-[Co(H2O)(β-ala)(NH3)3]2+ have also been measured. The absolute configurations of the fac(NH3) isomers have been determined by referring to the CD spectrum of fac(NH3)-(−)589[Co(NO2)(gly)(NH3)3]ClO4 which had been subjected to an X-ray analysis. Each isomer has exhibited a dominant Cotton peak at ca. 20000 cm−1 in the first absorption band region. The peak has been assigned to the electronic transition component which arises in the plane containing the glycinate chelate. The CD spectra fac(NH3)-[Co(a)(gly)(NH3)3]+ have been compared with those of the corresponding [Co(a)(gly)(1,4,7-triazacyclononane)]+ complexes, and the sources of the optical activities in these complexes have been investigated.
Reactivity of Aromatic o-Hydroxy Oximes. I. Synthesis and Aminolysis of Acylglycine Esters of Aromatic o-Hydroxy Oximes
Authors: Hayashi Ikuo , Ogihara Keizo , Shimizu Kiyoshi 
Published: July 2006

Abstract
Active esters (1) of glycine with o-hydroxybenzaldehyde oxime, o-hydroxyacetophenone oxime, o-hydroxybenzophenone oxime, and their 5-Cl and 5-NO2 derivatives were prepared by several methods. For aminolysis with benzylamine, esters 1 show higher reactivity than similar esters containing no hydroxyl group in the ortho position. It is suggested that esters 1 forms an intramolecular hydrogen bond between the hydrogen of the hydroxyl group at the ortho position and the hydroxyimino nitrogen so as to have its carbonyl group activated for the aminolysis; this mechanism of activation seems to be a sort of “intramolecular acid-catalysis.” Among the series of esters 1, esters of o-hydroxybenzaldehyde oxime and its 5-Cl and 5-NO2 derivatives are most reactive in the aminolysis. The reactivity of esters 1 is also discussed in relation to pKa values of aromatic o-hydroxy oximes.
The Ruthenium Complex Catalyzed N-Heterocyclization of Aminoarenes to Quinoline Derivatives Using Allylic Alcohols and Aliphatic Aldehydes
Authors: Watanabe Yoshihisa , Tsuji Yasushi , Ohsugi Yukihiro , Shida Jun 
Published: July 2006

Abstract
Aminoarenes reacted with 2-propen-1-ol and 2-buten-1-ol at 180 °C to give quinoline derivatives in fairly good yields in the presence of a catalytic amount of a ruthenium complex. Dichlorotris(triphenylphosphine)ruthenium was the most effective catalyst. The aminoarenes with electron-releasing groups favored the formation of the quinolines. The N-heterocyclization also proceeded when aliphatic aldehydes were used in place of the allylic alcohols. The employment of allylic alcohols gave, however, higher yields in several cases. The reaction involves the isomerization of the allylic alcohols to the corresponding aldehydes. The aldehydes reacted with aminoarenes to give Schiff-base dimers which were then cyclized in the presence of the ruthenium complex to the quinolines. As a key intermediate in the reaction, the ortho-metallated species has been proposed.
The Reaction of Olefins with a Mixture of Iodine and Mercury(II) Thiocyanate. Predominant Formation of vic-Iodo(isothiocyanato)alkanes
Authors: Watanabe Nanao , Uemura Sakae , Okano Masaya 
Published: July 2006

Abstract
Treatment of olefins with a mixture of iodine and mercury(II) thiocyanate in benzene or diethyl ether gives vic-iodo(isothiocyanato)alkanes and vic-iodo(thiocyanato)alkanes in a high yield, the former being predominant. Similar results were obtained by using silver(I) and thallium(I) thiocyanates, though both the yield and the selectivity are slightly lower. By use of potassium thiocyanate and copper(I) isothiocyanate in place of mercury(II) thiocyanate, β-iodo thiocyanates were mainly formed. A reaction scheme involving initial formation of an iodonium ion from olefin and ISCN (formed in situ) and a subsequent attack of complex anion I(SCN)2− has been proposed to account for this predominant formation of β-iodo isothiocyanates.
Effect of Multiple Field Assistance with Reversed Micelles on the Decarboxylation of 6-Nitro-1,2-benzisoxazole-3-carboxylate
Authors: Sunamoto Junzo , Iwamoto Kiyoshi , Nagamatsu Shinichi , Kondo Hiroki 
Published: July 2006

Abstract
Decarboxylation reaction of 6-nitro-1,2-benzisoxazole-3-carboxylate (1) in cationic and anionic reversed micelles has been investigated with particular attention to the microenvironmental effect, such as microviscosity, micropolarity, and microactivity, in the specific and restricted reaction field as provided by reversed micelles. In 0.20 M CTAC/0.32 M H2O/CHCl3 reversed micelles, the reaction was accelerated about 1300-fold compared with that in bulk aqueous solution. Of various surfactant aggregate systems such as aqueous micelle, bilayer, and reversed micelle, the cationic reversed micelle could provide the most effective reaction field for the present decarboxylation reaction. This reaction is never accelerated in an anionic aqueous micelle. However, in the anionic AOT reversed micelle, the reaction was apparently accelerated by both lowering the micropolarity and increasing the microviscosity around the substrate. The unique rate enhancement for the decarboxylation reaction of 1 provided by reversed micelles was interpreted in terms of the “multiple field assistance.”
Free Radical Chain Reaction of Allylic Tin Compounds with Organic Halides Involving SH′ Process
Authors: Migita Toshihiko , Nagai Kazukiyo , Kosugi Masanori 
Published: July 2006

Abstract
Negatively substituted halomethanes were allylated easily by allyltin compounds via radical chain reaction involving SH′ process. Aryl, aralkyl, and alkyl halides underwent similar chain reactions only when the tin compound was charged in excessive amounts.
N,N′-Carbonyldi[1,2-benzisoxazol-3(2H)-one]: New, Reactive Condensing Agent
Authors: Ueda Mitsuru , Oikawa Hideaki , Kawaharasaki Naomi , Imai Yoshio 
Published: July 2006

Abstract
A new condensing agent, N,N′-carbonyldi[1,2-benzisoxazol-3(2H)-one] (6), was readily prepared by the reaction of 1,2-benzisoxazol-3-ol and trichloromethyl chloroformate in toluene. The condensing agent 6 was shown to be very useful for the preparation of amides, esters, and dipeptides under mild conditions. A successful polyamide synthesis by one-pot polycondensation of isophthalic acid with diamines using 6 was also described.
Thermal Studies of Nickel(II) Hydrazine Complexes in Solid State
Authors: Banerjee Bijoy , Biswas Prasanta Kumar , Ray Chaudhuri Nirmalendu 
Published: July 2006

Abstract
Two bis(hydrazine)nickel(II) fluoro complexes of the type [NiL2F2]·H2O, where L=NH2NH2 have been synthesized. Besides these, [NiL2.5(H2O)2]F2·0.5H2O and [NiL2.5F2]·2H2O have also been synthesized. Thermal investigations of these complexes have been carried out. Four tris(hydrazine)nickel(II) chloride and four tris(hydrazine)nickel(II) bromide complexes have been prepared and their thermal investigations have been done. Two bis(hydrazine) thiocyanato complexes have also been prepared and their thermal studies have also been carried out. These nickel(II) hydrazine complexes have been found to decompose through several complex species as intermediates. All these intermediates as well as the parent complexes have been characterized by elemental analyses, color, magnetic moment, electronic spectra (mull), and IR spectra. X-Ray powder diffraction pattern of two tris(hydrazine)nickel(II) bromide complexes have been obtained. The probable mechanistic paths for each step of decomposition have been proposed.
Carbon Monoxide Absorption by Solutions of Aluminium Copper(I) Chloride in Various Aromatic Solvents
Authors: Hirai Hidefumi , Nakamura Masahiro , Komiyama Makoto 
Published: July 2006

Abstract
Carbon monoxide absorbents composed of aluminium copper(I) chloride and various aromatic solvents are prepared, and their absorbing capacities are determined. The plot of the equilibrium molar ratio of the absorbed carbon monoxide to AlCuCl4 vs. the ionization potential of the aromatic solvent indicates that both electronic and steric factors are important in the molecular complex formation between AlCuCl4 and aromatic solvent molecules.
A Convenient Method for the Synthesis of Acyclic Ketones. Synthesis of Sex Pheromone of Douglas Fir Tussock Moth
Authors: Murata Yasue , Inomata Katsuhiko , Kinoshita Hideki , Kotake Hiroshi 
Published: July 2006

Abstract
(α-Alkyl-α-methylthio)alkyl p-tolyl sulfones derived from the reaction of α-alkylated alkyl p-tolyl sulfones with dimethyl disulfide could be easily hydrolyzed by CuCl2–SiO2 to give the corresponding ketones in fairly good yields. This method was applied to the synthesis of Douglas Fir Tussock Moth Pheromone.
Cation Transport through Liquid Membranes Facilitated by Crown Ether-modified Poly(iminoethylene)s
Authors: Anzai Jun-ichi , Sakata Yoko , Suzuki Yasuhiro , Ueno Akihiko , Osa Tetsuo 
Published: July 2006

Abstract
Poly(iminoethylene)s containing benzo-15-crown-5 moieties as pendant groups can transport Rb+ cation more effectively than the other alkali cations through an organic liquid membrane. The transport selectivities of the polymers diminish drastically with decreasing crown ether content in the polymer chain.
ESR Studies of Bunsen-type Methane-Air Flames. II. The Effects of the Addition of Halogenated Compounds to the Secondary Air on the Hadrogen Atoms in the Flame
Authors: Noda Shoji , Fujimoto Susumu , Claesson Ola , Yoshida Hiroshi 
Published: July 2006

Abstract
Hydrogen atoms in a methane-air Bunsen-type flame were detected by the flame-in-cavity ESR method. The addition of a halogenated compound to the secondary air was found to reduce the H-atom concentration linearly with an increase in the additive concentration. The eight halogenated compounds examined showed an increased effectiveness in scavenging H atoms in this order; HCl&lt;CF2Cl2&lt;CHCl3&lt;CH3Cl&lt;CH2Cl2&lt;CFCl3&lt;CCl4&lt;CH3Br. This chemical effect of the halogenated compounds on the combustion reactions agrees well with the inhibitor index for these compounds.