bluuebunny/crossref_metadata_2025_split huggingface dataset:
SYNTHESIS OF ISOAMYLENE FROM METATHESIS OF ISOBUTENE WITH CIS-2-BUTENE
Authors: Nakamura Ryuichi , Iida Hiroshi , Echigoya Etsuro 
Published: July 2006

Abstract
Metathesis of isobutene with cis-2-butene was studied over MoO3–Al2O3 and Re2O7–Al2O3 catalysts using a flow reactor. Effects of alkali addition to MoO3–Al2O3 and of reaction temperature on the reaction results were investigated. With Re2O7–Al2O3, a satisfactory yield of isoamylene was obtained with a high degree of selectivity.
DEHYDRATION AND ALKYLATION REACTIONS BY THE USE OF PERCHLORATE SALTS
Authors: Mukaiyama Teruaki , Kuwahara Mikio , Izawa Toshio , Ueki Masaaki 
Published: July 2006

Abstract
By the treatment of secondary and tertiary benzylic alcohols or tertiary aliphatic alcohols with AgClO4, in benzene at refluxing temperature for 20 to 420 min, olefins were obtained as dehydrated products in good yields. Further, a new procedure for generating tin perchlorate was devised, and the application of this reagent to alkylation reactions of aromatic compounds from alcohols or paraformaldehyde was investigated.
MICROWAVE SPECTRUM AND STRUCTURE OF VANADYL(V) CHLORIDE
Authors: Karakida Ken-ichi , Kuchitsu Kozo , Matsumura Chi 
Published: July 2006

Abstract
The microwave spectrum of vanadyl(V) chloride was measured, and the following rotational constants (in MHz) were determined: Bo =1741.72±0.01 for OV35Cl3, Bo =1665.20±0.02 for OV37 Cl3, Ao =1739.94±0.05, Bo =1692.17±0.05, Co =1139±1 for OV35Cl237Cl. From these constants the ro structure was determined: r(V–O)=1.595±0.005 Å, r(V–Cl)=2.131±0.001 Å and ∠(Cl–V–Cl)=111.8±0.2°.
THE STRUCTURE OF C20H18O3, A PRODUCT OF THE REACTION OF ACETOPHENONE WITH FORMALDEHYDE IN ACIDIC MEDIA
Authors: Terada Akira , Toyoshima Yoshimasa , Yamaji Tadasu , Sekine Kiyoharu 
Published: July 2006

Abstract
The chemical structure of C20H18O3 (I) which is a crystalline product obtained from the acidic condensation of acetophenone with formaldehyde has been established as 1-benzoyl-4-methylene-5-phenyl-6,8-dioxacyclo[3,2,1]octane. This compound is identical with the product, C20H18O3, isolated by Beets and Heeringa from the Prins reaction of phenylacetylene. The formation mechanism has also been proposed.
A NEW SYNTHESIS AND ENE REACTION OF 1,2-DIPHENYLCYCLOPROPENE
Authors: Yoshida Zen-ichi , Miyahara Hideki 
Published: July 2006

Abstract
A new worthwhile synthesis of 1,2-diphenylcyclopropene (1) by the dehydrochlorination of cis- and trans-1-chloro-1,2-diphenylcyclopropanes has been found. The isolation of two dimers and ene reactions of 1 have also been described.
OXYGEN ATOM REACTIONS WITH METALLOCENES
Authors: Koda Seiichiro , Hikita Tsutomu 
Published: July 2006

Abstract
We investigated the products of atomic oxygen reaction with ferrocene and nickelocene, comparing them with those of oxygen atom reaction with 1,3-cyclopentadiene. In the case of cyclopentadiene, important products were C4H6 isomers and in the case of metallocenes, vinylacetylene.
THE PHOTOCHEMICAL (4 + 4) CYCLOADDITIOM OF FURAN TO α-NAPHTHONITRILE
Authors: Pac Chyongjin , Sugioka Taizo , Sakurai Hiroshi 
Published: July 2006

Abstract
The photochemical reaction of α-naphthonitrile with furan affords a (4 + 4) cycloadduct, 1-cyano-9,10-benzo-11-oxatricyclo [4,2,2,12,5] undeca-3,7,9-triene (I), in a good yield, and an exciplex intermediacy is suggested on kinetic and spectroscopic grounds.
ESR Study of Hot Ions: Pb(III) in γ-Irradiated Lead Tetraacetate
Authors: Isoya Jun-Ichi , Ishizuka Hidehiro , Yamasaki Akira , Fujiwara Shizuo 
Published: July 2006

Abstract
An unstable paramagnetic Pb(III) hot ion was identified in γ-irradiated polycrystalline lead tetraacetate by ESR hyperfine spectrum of 207Pb isotope. ESR parameters are as follows: (gx, gy, gz)=(2.0063, 2.0077, 2.0035). (Ax/gxβ, Ay/gyβ, Az/gzβ)=(12819, 12827, 12854 (gauss)).
THE PREPARATION OF SOME TROPONE COMPLEXES
Authors: Asao Toyonobu , Ninomiya) Yoriko Kikuchi (née 
Published: July 2006

Abstract
Tropone and its various derivatives were found to form several complexes having a composition of 1 : 1, 1 : 2, or 2 : 1 with mercury (II), zinc (II), cadmium (II), copper (II), cobalt (II), manganese (II), and nickel (II). In all cases, co-ordination would occur with the carbonyl oxygen.
THE THERMALLY INDUCED INTRAMOLECULAR CYCLIZATION OF THE TETRACYCLO (3.3.2.02,4.06,8]DEC-9-ENE SYSTEM
Authors: Toda Takashi , Tanigawa Chie-ko , Yamae Akira , Mukai Toshio 
Published: July 2006

Abstract
Dimethyl tetracyclo[3.3.2.02,4.06,8]dec-9-ene-2,4-dicarboxylate has been synthesized from cycloheptatriene in three steps, and its thermal and photochemical behaviors have been investigated, It was inert to light, but gave a pentacyclic compound on heating. In the same way, dimethyl tricyclo(3.2.1.02,4)oct-6-ene-2,4-dicarboxylate afforded an analogous tetracyclic compound.
ASYMMETRIC HYDROFORMYLATION OF STYRENE BY OPTICALLY ACTIVE PHOSPHINE–RHODIUM COMPLEX CATALYST
Authors: Ogata Ikuei , Ikeda Yoshikazu 
Published: July 2006

Abstract
Styrene was hydroformylated by a rhodium catalyst in the presence of excess (+)-benzylmethylphenylphosphine (10 moles per 1 atom Rh) at 120°C under 100 atm(initial) of synthesis gas (CO/H2=1) to give an optically active product ([α]D25 +38.5° , content of hydratropaaldehyde 90%).
FORMATION OF A DIMER IN THE REACTION OF l-HISTIDYLGLYCINE OR l-HISTIDYLGLYCYLGLYCINE WITH COPPER(II) IN AQUEOUS SOLUTION
Authors: Yokoyama Akira , Aiba Hiroji , Tanaka Hisashi 
Published: July 2006

Abstract
In complex formation of l-histidylglycine or l-histidylglycylglycme with copper(ll), formation of dimer through deprotonation of peptide amide group was indicated in neutral region, by electronic spectra and pH titration. Possible structure is proposed, in which imidazole-nitrogen coordinates to one copper(II) and other coordination sites bind to another copper(II).
THE BIOSYNTHESIS OF A NON-HEAD TO TAIL MONOTERPENE, ARTEMISIA KETONE
Authors: Suga Takayuki , Shishibori Tsuyoshi , Kotera Kazuo , Fujii Ritsuko 
Published: July 2006

Abstract
Artemisia ketone (1) biosynthesized from [2-14C]mevalonic acid by Artemisia annua L. was found to contain 80% and 13% of the incorporated tracer in the internal and terminal methyls respectively. The unbalance of labelling means that the C5-precursors of two halves of (1) are enzymatically differentiated.
A CONVENIENT SYNTHESIS OF 4-DIMETHYLSULFURANYLIDENE-2,3-DIOXOTETRAHYDROFURAN DERIVATIVES; THE REACTIONS OF ETHYL (DIMETHYLSULFURANYLIDENE) PYRUVATE WITH CARBONYL COMPOUNDS
Authors: Hagio Katsuaki , Takei Hisashi , Mukaiyama Teruaki 
Published: July 2006

Abstract
The cyclic ylides, 4-dimethylsulfuranylidene-2,3-dioxotetrahydrofuran derivatives, were synthesized by the reactions of ethyl (dimethylsulfuranylidene)pyruvate with carbonyl compounds in good yields. The structures of new sulfonium ylides were comfirmed by the spectral data and the elemental analyses.
THE PHOTOCHEMICAL REACTION OF HYDROGEN CYANIDE IN GAS PHASE AT 184.9 nm
Authors: Mizutani Hiroshi , Mikuni Hitoshi , Takahasi Makoto 
Published: July 2006

Abstract
The photochemistry of hydrogen cyanide at 184.9 nm was studied. Major reaction products are cyanogen and hydrogen, and minors are methane, ammonia, ethane, hydrazine and methylamine. The addition of hydrogen atoms to hydrogen cyanide is considered for the formation of these products. A reddish brown polymeric substance was also obtained and its IR spectrum is presented.
ON THE STABLE RADICAL CATION PRODUCED DURING THE PHOTOREDUCTION OF 9,9′-BIACRIDYL IN ETHANOL AND ITS ESR SPECTRUM
Authors: Niizuma Shigeya , Nakamaru Katsumi , Koizumi Masao 
Published: July 2006

Abstract
ESR spectrum due to 9,9′-biacriden radical cation (BAH2+·) was detected and its hfs was analysed. BAH2+· exists in the degassed acidic ethanol solution of 9,9′-biacridyl (BA) and biacriden (BAH2) and is also produced by the photoreduction of BA in the acidic ethanol. All the findings support the following equilibrium. BAH++BAH2+H+ (Remark: Graphics omitted.) 2BAH2+·.
TOPOCHEMICAL STUDIES. I. THE CRYSTAL AND MOLECULAR STRUCTURE OF POTASSIUM DIHYDROGEN trans-ACONITATE, K+(HOOC·CH2·C(COOH)=CH·COO)−
Authors: Fukuyama Keiichi , Kashino Setsuo , Haisa Masao 
Published: July 2006

Abstract
Crystals of potassium dihydrogen trans-aconitate, C6H5O6K, are monoclinic, a=11.856, b=15.920, c=8.426 Å, β=90.88°, Z=8, and space group C2/c. The structure was solved by the heavy-atom method and refined by block-diagonal least-squares method to R=0.060 for 1677 independent non-zero reflections measured by four-circle diffractometry. There are two types of hydrogen bonds; one is intramolecular (2.53 Å) and the other is intermolecular (2.52 Å). The distances between neighboring double-bonds are longer than 4.96 Å; hence the molecules are too far away to dimerize by ultraviolet light.
DECOMPOSITION OF 1-AZIDO-1,3-BUTADIENES
Authors: Isomura Kazuaki , Okada Masato , Taniguchi Hiroshi 
Published: July 2006

Abstract
The photolysis and the thermolysis of the title compounds (I) were studied. The photolysis of (I) at low temperature gave 3-alkenyl-1-azirine (II) but at room temperature gave (II), pyrrole (III) or butenonitrile (IV) depending on the nature of the substituents of (I). The thermolysis of (I) gave (III), (IV) or 2H-pyrrole (V).
SYNTHESIS OF o-ETHYNYLBENZALDEHYDE AND AN APPROACH TO DIBENZO[18]ANNULENE
Authors: Ojima Juro , Yokomachi Tadayoshi , Yokoyama Tai 
Published: July 2006

Abstract
A convenient synthesis of o-ethynylbenzaldehyde (VIII) has been developed. An approach to dibenzo[18]annulene from VIII has also been described.
SYNTHESIS AND SOME PROPERTIES OF 8,8′-DIHEPTAFULVENYL KETONE
Authors: Yagihara Morio , Kitahara Yoshio , Asao Toyonobu 
Published: July 2006

Abstract
8,8′-Diheptafulvenyl ketone has been synthesized, and its uv, ir, and nmr spectra were demonstrated, from which it can be concluded that a dipolar structure would largely contribute for the ground state, Some chemical properties of the compound has also been studied.
SOLVENT DEPENDENCE IN THE PHOTOCHEMICAL OXIDATION OF 6,6-DIMETHYLFULVENE AND ISOLATION OF 5-ISOPROPENYL-4-HYDROXY-2-CYCLOPENTENONE
Authors: Harada Nobuyuki , Uda Hisashi , Ueno Hiroshi 
Published: July 2006

Abstract
The photooxidation of 6,6-dimethylfulvene in benzene, carbon disulfide, chloroform, or acetone afforded preferentially 3,3-dimethyl-2(3H)-oxepinone (25∼30%), whereas in methanol 5-iso-propylidene-4-hydroxy-2-cyclopentenone was predominantly isolated (50%) after chromatography on alumina. Furthermore it has been found that 5-isopropenyl-4-hydroxy-2-cyclopentenone was also formed and easily isomerized to the above isopropylidene derivative during chromatography.
NEGATIVE TEMPERATURE DEPENDENCE OF THE PHOTOCHEMICAL (4+4) CYCLOADDITION OF FURAN TO α-NAPHTHONITRILE : EVIDENCE FOR EXCIPLEX INTERMEDIACY
Authors: Sugioka Taizo , Pac Chyongjin , Sakurai Hiroshi 
Published: July 2006

Abstract
The photochemical (4 + 4) cycloaddition of furan to α-naphthonitrile (α-NN) giving 1-cyano-9,10-benzo-11-oxatricyclo[4,2,2,12,5] undeca-3,7,9-triene (I) showed negative temperature dependency. An identical Arrhenius plot of γkrτ was obtained from both quantum yield and fluorescence quenching experiments. These results were interpreted as caused by reversible dissociation of an exciplex.
APPLICABILITY OF THE MO THEORY PROPOSED BY HIROTA TO FRAGMENT ION DISTRIBUTION AFTER CHARGE EXCHANGE REACTIONS ON ALKANES
Authors: Ikuta Shigeru , Yoshihara Kenji , Shiokawa Takanobu 
Published: July 2006

Abstract
The relation between the distribution of fragment ions and the recombination energy of the incident positive ions after bombardment of a series of n-alkanes with various positive ions has been studied by the use of a double mass spectrometer, TOHOKU CS, and the theory proposed by Hirota was tested.
SOLVOLYSIS OF ORGANIC PHOSPHATES. VII. SPONTANEOUS HYDROLYSIS OF 2,2,2-TRICHLOROETHYL PHOSPHATE
Authors: Murakami Yukito , Sunamoto Junzo , Kanamoto Naomi 
Published: July 2006

Abstract
The spontaneous hydrolysis of 2,2,2-trichloroethyl phosphate was investigated at 90°C in aqueous media with an ionic strength of 0.10 (KNO3) over pH 3–5. The reaction followed apparent first-order kinetics with respect to the phosphate species. Trichloroethanol once produced during the reaction was further hydrolyzed with the liberation of hydrochloric acid. However, the liberation of hydrochloric acid has never been detected unless the phosphate was hydrolyzed. No significant participation of the neighboring β-chlorine atom was observed in the phosphate hydrolysis.
MOLECULAR ARRANGEMENT IN THE NEMATIC DROPLET
Authors: Nakamizo Minoru , Sakagami Sakumitsu , Takase Akira 
Published: July 2006

Abstract
Optical studies were made of the molecular arrangement in the nematic droplet which was allowed to remain stable over the temperature range of the nematic mesophase. A new model of the molecular arrangement was proposed to explain the observed changes of the microscopic pattern.
STUDIES ON THE METAL CHELATES OF cis- AND trans-2-AMINOCYCLOHEXANECARBOXYLIC ACIDS
Authors: Kidani Yoshinori , Saito Reiko , Koike Hisashi 
Published: July 2006

Abstract
Metal chelates of cis- and trans-2-aminocyclohexanecarboxylic acids with divalent metals were newly synthesized and the binding ratios were found to be 2:1. Measurements of pKa of cis- and trans-ligands, as well as the stability constants of Cu and Ni chelates were performed and the stability constants of cis chelates were found to be larger than those of the corresponding trans chelates.
EFFECT OF PRESSURE ON THE RATE OF SOLVOLYSIS. FORMOLYSIS OF 1-(P-SUBSTITUTED BENZYL)ETHYL TOSYLATES
Authors: Yamagami Chisako , Sera Akira 
Published: July 2006

Abstract
The pressure dependence of the formolysis rates of the title compounds was examined and activation volumes, ΔV\eweq, were calculated. Electron donating substituents in the aryl rings gave rise to less negative values of ΔV\eweq.
EFFECTIVE SEPARATION OF HAFNIUM(IV) FROM ZIRCONIUM(IV) AS PYRIDINIUM TERNARY HETEROPOLY SALTS
Authors: Murata Katsuo , Takemoto Shumei , Ikeda Shigero 
Published: July 2006

Abstract
The remarkable difference was observed between Zr(IV) and Hf(IV) in the formation of pyridinium ternary heteropoly salts. Separation of Hf(IV) from Zr(IV) using this simple precipitation reaction was examined.
ISOLATION AND CHARACTERIZATION OF TWO NEW DITERPENOIDS PROM LEUCOTHOE GRAYANA MAX.
Authors: Hamanaka Nobuyuki , Miyakoshi Hidehiro , Furusaki Akio , Matsumoto Takeshi 
Published: July 2006

Abstract
Structures of two new diterpenoids, grayanotoxin XIV and XV, have been determined as 2 and 3 respectively, by correlating with a known compound in the case of 2 and by X-ray diffraction in the case of 3.
THE REACTION OF N,N′-THIOBISPHTHALIMIDE WITH ARENESULFINIC ACIDS
Authors: Abe Yasuo , Tsurugi Jitsuo 
Published: July 2006

Abstract
The reaction of N,N′-thiobisphthalimide with arenesulfinic acids in the molar ratios of 1:1 and 1:2 produced N-(arenesulfonylthio)phthalimides and diarenesulfonyl sulfides, respectively.
SELINANE-TYPE SESQUITERPENES. ACOLAMONE AND ISOACOLAMONE
Authors: Niwa Masatake , Nishiyama Atsuko , Iguchi Masanobu , Yamamura Shosuke 
Published: July 2006

Abstract
Isolation of two new selinane-type sesquiterpenes, named acolamone (II) and isoacolamone (III), is described and their structures have also been elucidated in connection with the base catalyzed cyclization of an epoxygermacrone (IV), which has been derived from preisocalamendiol, leading to the formation of a selinane-type α,β-unsaturated ketone (V).
VACUUM DEPOSITION OF A QUINOLINIUM(TCNQ)2 THIN FILM
Authors: Yoshimura Susumu , Murakami Mutsuaki , Itoh Yoshimasa , Hasegawa Katsue 
Published: July 2006

Abstract
A thin film of a highly conducting organic semiconductor was obtained by direct evaporation of quinolinium(TCNQ)2 ion-radical salt. The temperature of the evaporation source was controlled so as to prevent the salt from decomposing and dissociating. Optical and electrical properties were investigated on the vacuum-deposited thin films.
COULOPOTENTIOGRAPHY
Authors: Fujinaga Taitiro , Okazaki Satoshi , Yamada Takeshi 
Published: July 2006

Abstract
A new electrolytic method, coulopotentiography, has been developed, in which total current i.e. the number of coulombs is recorded against the electrode potential, in contrast to the polarography in which diffusion current is measured. The total set-up (Figure 1) and the recorded coulopotentiogram (Figure 2) are shown with the discussion of the present method from the stand point of analytical methodologies.
RADIOLYTIC DECHLORINATION OF POLYCHLORINATED BIPHENYLS (PCB) IN ORGANIC SOLUTIONS
Authors: Sawai Takeshi , Shinozaki Yoshiharu 
Published: July 2006

Abstract
The radiolytic dechlorination from PCB in organic solutions, has been studied. The chain reaction does not occur in neutral alcoholic solutions and alkaline methanol solution but occurs in alkaline 2-propanol solutions, and G(Cl−) reaches about 450 at 5×10−2 M potassium hydroxide concentration.
FERRICINIUM ION AS THE OXIDIZING REAGENT IN THE CHEMILUMINESCENCE REACTION OF LUMINOL IN ORGANIC SOLVENT-WATER MIXTURES
Authors: Matsumoto Tamotsu , Sato Masanori 
Published: July 2006

Abstract
In the presence of ferricinium ion, the chemiluminescence of luminol is observed in alkaline acetonitrile-water and methanol-water mixtures. The emission intensity is as strong as that observed in the presence of ferricyanide ion. The luminescence decays exponentially within a second.
A PRELIMINARY STUDY ON THE RADIOLYSIS OF CHLOROFLUOROCARBONS
Authors: Tominaga Takeshi , Iwata Ren , Makide Yoshihiro 
Published: July 2006

Abstract
The radiolysis products from liquid CF2Cl2, CFCl3, CF2ClCF2Cl and their mixtures with bromine were analyzed by gas chromatography. The C–Cl and C–C bonds appear to be broken far more readily than the C–F bond in the γ radiolysis of these chlorofluorocarbons.
THE ESR SPECTRA OF THE ANION RADICALS OF 2-METHOXYTROPONE AND ITS DERIVATIVES
Authors: Ikegami Yusaku , Watanabe Hidetoshi , Seto Shuichi 
Published: July 2006

Abstract
The ESR spectrum of the 2-methoxytropone anion radical has been examined. The radical was generated by electrolytic reduction of the neutral species in N,N-dimethylformamide. Hyperfine splitting constants of the ESR spectrum were reasonably assigned by comparison with the calculated spin densities. 5-Methyl, 5-isopropyl, and 5-nitro derivatives of 2-methoxytropone have also been examined in a similar way.
THE POLARITY EFFECTS ON THE YIELD OF THE TRAPPED ELECTRON PRODUCED IN GLASSY ALCOHOLS
Authors: Sasaki Teikichi , Ohno Shin-ichi , Kawatsura Kiyoshi 
Published: July 2006

Abstract
The yields of the trapped electron produced in alkyl alcohol and ethylene glycol at 77 °K glasses were determined. For all alcohol glasses, the yields declined in the high dose irradiation of gamma rays. It has been shown that the maximum concentration of the trapped electron increases with dielectric constant of the alcohol.
MOLECULAR ASSOCIATION OF THE 1:2 COMPLEXES OF COPPER(II) WITH AMINO ACIDS IN AQUEOUS MEDIA
Authors: Yokoi Hiroshi , Isobe Taro 
Published: July 2006

Abstract
The ESR experiments show that the 1:2 complexes of copper(II) with amino acids are present in frozen aqueous solution as a kind of aggregates, whose structures are different from those in crystals, and the aggregates disperse into dimers and monomers in the frozen aqueous solutions containing alcohols, protein denaturants, or certain inorganic salts.
OPTICAL DETECTION OF ELECTROCHEMICALLY GENERATED UNSTABLE REDUCTION INTERMEDIATES OF TRIS(2, 2′-BIPYRIDINE)CHROMIUM(III) BY REFLECTIVITY MEASUREMENT AT SILVER ELECTRODE IN PROPYLENE CARBONATE
Authors: Sato Yuichi 
Published: July 2006

Abstract
Tris(2, 2′-bipyridine)chromium(III) perchlorate gave three step reduction waves ascribed to [Cr(bipy)3]3+ \xrightarrowe [Cr(bipy)3]2+ \xrightarrowe [Cr(bipy)3]+ \xrightarrowe [Cr(bipy)3]0 on Ag electrode in propylene carbonate. Simultaneously recorded reflectivity-potential curve shows three steps of reflectivity decrease corresponding to the each wave on i-E curve. Absorption spectra due to the unstable low valence state of the complex produced during the electrolysis have successfully been obtained by the plotting of the reflectivity change at each step vs. wavelength.
A KINETIC STUDY OF TRICHLOROSILYL RADICAL ADDITION TO ETHYLENE IN THE GAS PHASE
Authors: Dohmaru Takaaki , Nagata Yoshio , Tsurugi Jitsuo 
Published: July 2006

Abstract
A kinetic study of the photolytic reactions of trichlorosilane with ethylene in the presence of acetone has revealed that the addition of trichlorosilyl radicals to ethylene becomes appreciably reversible around 200°C in the gas phase. ΔH value for the addition of trichlorosilyl radicals to ethylene estimated in this study is about 16 kcal/mol.
THE 3250 A He–Cd LASER EXCITED RESONANCE RAMAN EFFECT OF PdBr42−
Authors: Hamaguchi Hiro-o , Harada Issei , Shimanouchi Takehiko 
Published: July 2006

Abstract
The rigorous resonance Raman effect was observed for the square planar PdBr42− ion, using the ultraviolet line of a He–Cd laser as the exciting source. The overtone progression of the totally symmetric vibration was observed up to the fourth.
CHLORINE PURE QUADRUPOLE RESONANCE IN CARBON TETRACHLORIDE EVIDENCE FOR PHASE TRANSITIONS
Authors: Murata Shigeo , Fujita Kazuyoshi , Suhara Masahiko 
Published: July 2006

Abstract
The temperature dependence of 35Cl PQR frequency in CCl4, has been measured at 77 to 110 K. Three discontinuous behaviors, which are attributable to phase transitions, were found in the temperature regions, 77–90, 90–100, and 90–110 K.
CHEMICAL REACTIONS OF ELECTRON DONOR-ACCEPTOR SYSTEMS: THERMAL [2+2] CYCLOADDITION REACTIONS OF SOME AROMATIC-SUBSTITUTED OLEFINS WITH TETRACYANOETHYLENE
Authors: Nagata Jun-ichiro , Shirota Yasuhiko , Nogami Takashi , Mikawa Hiroshi 
Published: July 2006

Abstract
Some aromatic-substituted olefins, e.g., acenaphthylene, indene, and 1-vinylpyrene cycloadded thermally to tetracyanoethylene to give the corresponding cyclobutane derivatives, the reactivity of the olefins increasing with a decrease in their ionization potentials. With 1-vinylnaphthalene Diels–Alder addition of tetracyanoethylene was favored over [2+2] cycloaddition, and with 1,2-dihydronaphthalene, dehydrogenation by tetracyanoethylene occurred to give naphthalene and tetracyanoethane.
THE STEREOSPECIFIC PREPARATION OF TRISUBSTITUTED OLEFINS
Authors: Kobayashi Susumu , Takei Hisashi , Mukaiyama Teruaki 
Published: July 2006

Abstract
Ethyl (E)-3-methyl-2-heptenoate, 6, or ethyl (Z)-3-methyl-2-heptenoate, 8, was prepared in high yield with the perfect retention of configuration by the reaction of ethyl (E)-3-phenylthio-2-butenoate, 5, or (Z)-3-phenylthio-2-butenoate, 7, with n-butylmagnesium bromide and cuprous iodide, respectively.
STUDIES ON THE MECHANISM OF REACTION BETWEEN SULFUR AND OXYGEN ON A MOLYBDENUM SURFACE BY MEANS OF AUGER ELECTRON SPECTROSCOPY–THE WORKING STATE OF THE CATALYST SURFACE–
Authors: Kawai Tomoji , Kunimori Kimio , Kondow Tamotsu , Onishi Takaharu , Tamaru Kenzi 
Published: July 2006

Abstract
A direct observation of the “working state of the catalyst” by Auger Electron Spectroscopy during the reaction between segregated sulfur and gaseous oxygen on molybdenum revealed that the reaction takes place through the direct interaction between the ambient oxygen molecules and the surface sulfur at lower temperatures, whereas it proceeds predominantly between the sulfur and the chemisorbed oxygen at higher temperatures.
THE PHOTOCHEMICAL REACTION OF 3,5-DISUBSTITUTED ISOXAZOLES
Authors: Sato Tadashi , Yamamoto Koichi , Fukui Keitaro 
Published: July 2006

Abstract
3,5-Dimethyl-, 3-methyl-5-phenyl-, and 5-methyl-3-phenylisoxazole suffered a photo-induced solvent attack, as well as the usual photo-transposition isomerization, to give open-chain compounds as the main product. No solvent participation was, however, observed with 3,5-diphenylisoxazole.