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Volume 1, Issue 1
Displaying 1-26 of 26 articles from this issue
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Takashi Matsumoto, Kazuo Hidaka, Teruko Nakayama, Kenji Fukui1972 Volume 1 Issue 1 Pages 1-4
Published: January 05, 1972
Released on J-STAGE: April 19, 2006
JOURNAL FREE ACCESSFukiic acid derivatives have been synthesized from 3,4-dimethoxyphenylpyruvic acid by a stereospecific method. The synthetic methyl (+)-erythro-2,3-dihydroxy-4-(3,4-climethoxyphenyl)-3-methoxycarbonylbutyrate was shown to be identical with natural O,O′-dimethylfukiic acid dimethyl ester by a direct comparison.View full abstract -
Shogo Uchida, Morio Mochizuki1972 Volume 1 Issue 1 Pages 5-6
Published: January 05, 1972
Released on J-STAGE: April 19, 2006
JOURNAL FREE ACCESSExistence of a new double salt, potassium hydrogen sulfate sulfamate (K2SO4·2HSO3NH2) has been confirmed by the measurements of mutual solubilities of HSO3NH2 and K2SO4 in water at 30°C. [Fig. 1]
The double salt is a colorless, transparent and almost non-hygroscopic crystal having a composition of HSO3NH2 52.7%, K2SO4 47.3%(2:1 in mole), [Table 1] and melting point of 161∼162°C.View full abstract -
Hideki Sakurai, Masashi Murakami1972 Volume 1 Issue 1 Pages 7-8
Published: January 05, 1972
Released on J-STAGE: April 19, 2006
JOURNAL FREE ACCESSA chiral disilanyl radical produced from (−)-1-methyl-1,2,2,2-tetraphenyldisilane, [α]D-8.9°, undergoes chlorine abstraction to give the corresponding chlorodisilane with retention of configuration but in low optical yield, contrary to the case of the previously-reported chiral monosilyl radical. Factors influential on the stereochemical course on these radicals are discussed.View full abstract -
Renji Okazaki, Fumio Ishii, Kenji Ozawa, Naoki Inamoto1972 Volume 1 Issue 1 Pages 9-12
Published: January 05, 1972
Released on J-STAGE: April 19, 2006
JOURNAL FREE ACCESSPhotochemical reactions of 5-phenyl- and 4-,5-diphenyl-3H-1,2-dithiole-3-thiones with olefins gave 2-thiobenzoylmethylene-1,3-dithiolanes. Ethylenetrithiocarbonate, 2H-1,3-dithiole-2-thione or 3H-1,2-dithiole-3-one did not react with cyclohexene under the same condition, but the first compound gave 7,8-tetramethylene-1,4-,6,9-tetrathia-spiro [4.4] nonane by irradiation with low-pressure mercury lamp.View full abstract -
Hajime Nagano, Yoshihiko Moriyama, Yoshiaki Tanahashi, Takeyoshi Takah ...1972 Volume 1 Issue 1 Pages 13-16
Published: January 05, 1972
Released on J-STAGE: April 19, 2006
JOURNAL FREE ACCESSTwo new sesquiterpenes, farfugin A and B, isolated from Farfugium japonicum, have been shown to be a tetrahydronaphthofuran derivative (I) and a benzofuran derivative (II), respectively.View full abstract -
Zen-ichi Yoshida, Shigeo Yoneda, Toyonari Sugimoto1972 Volume 1 Issue 1 Pages 17-20
Published: January 05, 1972
Released on J-STAGE: April 19, 2006
JOURNAL FREE ACCESSThiopyrylium ion (I) has been found to form the CT complex having two CT absorption bands with olefin. Appearance of the two CT bands is rationalized by the existence of two closely located vacant orbitals of I.View full abstract -
Masao Kiyama, Toshikazu Akita, Yuji Tsutsumi, Toshio Takada1972 Volume 1 Issue 1 Pages 21-24
Published: January 05, 1972
Released on J-STAGE: April 19, 2006
JOURNAL FREE ACCESSAerial oxidation of titanous solutions has been carried out at temperatures between 60° and 95°C. A desired one of titanic oxides of anatase, brookite and rutile types, can be obtained from strongly acidic solutions by selection of the kind and concentration of anions present and temperature.View full abstract -
Hiroshi Yokoi, Mitsuru Sai, Taro Isobe1972 Volume 1 Issue 1 Pages 25-28
Published: January 05, 1972
Released on J-STAGE: April 19, 2006
JOURNAL FREE ACCESSTwo types of thermochromisms have been found for several β-diketone chelate complexes of copper(II) in pure pyridine. One is observed for such complexes as bis(acetylacetonato)copper(II), where the visible absorption spectra at various temperatures have well-defined isosbestic points. The other is observed for such complexes as bis(salicylaldehydato)copper(II), where only the spectral intensity increases unusually with a rise in temperature.View full abstract -
Takashi Matsumoto, Tetsuaki Okabe, Kenji Fukui1972 Volume 1 Issue 1 Pages 29-32
Published: January 05, 1972
Released on J-STAGE: April 19, 2006
JOURNAL FREE ACCESS(±)-Latifolic acid and its three (±)-stereoisomers have been synthesized from dimethyl 1-acetyl-2-methylsuccinate. The synthetic (±)-2,cis-dimethyl-trans-3-hydroxy-cis-3-carboxybutyrolactone was shown to be identical with natural latifolic acid.View full abstract -
Takashi Kameo, Osamu Manabe1972 Volume 1 Issue 1 Pages 33-34
Published: January 05, 1972
Released on J-STAGE: April 19, 2006
JOURNAL FREE ACCESSIt was found that nitration of toluene with nitric acid catalyzed by aromatic sulfonic acids supported on the porous materials gave mononitrotoluene of the high para-isomer content. Thus, nitration catalyzed by toluene-2,4-disulfonic acid supported on Celite-545 gave higher para:ortho ratio (1.60) than that of mixed acid nitration (0.6).View full abstract -
Shohji Watanabe, Kunihiro Ichimura1972 Volume 1 Issue 1 Pages 35-36
Published: January 05, 1972
Released on J-STAGE: April 19, 2006
JOURNAL FREE ACCESSThe photocyclization of diphenylfumarodinitrile was found to suffer the pH effect. The yield of 9,10-dicyanophenanthrene decreases with decrease in pH of the solution.View full abstract -
Michio Kobayashi1972 Volume 1 Issue 1 Pages 37-38
Published: January 05, 1972
Released on J-STAGE: April 19, 2006
JOURNAL FREE ACCESSFormation of an addition intermediate in the hydrolysis of alkyl nitrites is suggested on the basis of the incorporation of the oxygen atom of water into the ester recovered.View full abstract -
Chyongjin Pac, Taizo Sugioka, Hiroshi Sakurai1972 Volume 1 Issue 1 Pages 39-42
Published: January 05, 1972
Released on J-STAGE: April 19, 2006
JOURNAL FREE ACCESSThe 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.View full abstract -
Shigeaki Fujieda, Morio Setaka, Takao Kwan1972 Volume 1 Issue 1 Pages 43-44
Published: January 05, 1972
Released on J-STAGE: April 19, 2006
JOURNAL FREE ACCESSESR spectra were obtained with the methyl radical adsorbed on the surface of alumina. The nature of the motion of the radical was thought to be entirely different from those trapped on a silica gel surface or porous Vycor glass; the familiar quartet hf lines were replaced by a spectrum characterized with a sextet hf structure, suggesting that the three methyl protons were no longer equivalent at the surface of alumina.View full abstract -
Michinori Oki, Gaku Yamamoto1972 Volume 1 Issue 1 Pages 45-48
Published: January 05, 1972
Released on J-STAGE: April 19, 2006
JOURNAL FREE ACCESSA dl pair and a meso form of dimethyl 9-(1,1-dimethyl-2-phenylethyl)-9,10-dihydro-9,10-ethenoanthracene-11,12-dicarboxylate are obtained as stable isomers at room temperature. These isomers must originate from restricted rotation about the C9–Cα bond. Data for the thermal equilibrations and activation parameters for the interconversion are obtained.View full abstract -
Yasuhiko Shirota, Jun-ichiro Nagata, Hiroshi Mikawa1972 Volume 1 Issue 1 Pages 49-50
Published: January 05, 1972
Released on J-STAGE: April 19, 2006
JOURNAL FREE ACCESSIrradiation of a solution of acenaphthylene and tetracyanoethylene yielded the cycloadduct. The excited singlet acenaphthylene is suggested to be the reactive species.View full abstract -
Masanori Matsui, Shigetaka Koda, Shun′ichiro Ooi, Hisao Kuroya, ...1972 Volume 1 Issue 1 Pages 51-53
Published: January 05, 1972
Released on J-STAGE: April 19, 2006
JOURNAL FREE ACCESSIt has been established by X-ray analysis that the crystal of phenanthrolinium pentachloromanganate(III) contains (phenH2)2+ and square-pyramidal (MnCl5)2−.View full abstract -
Michio Fukunaga, Tadashi Sugawara, Michinori Oki1972 Volume 1 Issue 1 Pages 55-58
Published: January 05, 1972
Released on J-STAGE: April 19, 2006
JOURNAL FREE ACCESSA method of synthesis of 1,3,5-trithiane derivatives which carry the desired number of methyl groups is described. Anions derived from 1,3,5-trithianes are found to undergo fast proton exchange with 1,3,5-trithianes if the latters carry a methylene group placed between two sulfur atoms.View full abstract -
Shigeya Niizuma, Katsumi Nakamaru, Masao Koizumi1972 Volume 1 Issue 1 Pages 59-64
Published: January 05, 1972
Released on J-STAGE: April 19, 2006
JOURNAL FREE ACCESSESR 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+·.View full abstract -
Keiko Kawasaki, Haruo Hosoya1972 Volume 1 Issue 1 Pages 65-66
Published: January 05, 1972
Released on J-STAGE: April 19, 2006
JOURNAL FREE ACCESSA Monte Carlo calculation was performed to obtain the densities of the liquid states of pentanes based on a square lattice model. For the pentane isomers the numbers of the molecules admitted in the lattice are normal>iso>neo in agreement with the observed densities.View full abstract -
Nobuyuki Harada, Shukuko Suzuki, Hisashi Uda, Koji Nakanishi1972 Volume 1 Issue 1 Pages 67-70
Published: January 05, 1972
Released on J-STAGE: April 19, 2006
JOURNAL FREE ACCESSThe c.d. curves of (−)-luteoskyrin and (+)-rugulosin, as calculated on the basis of an electric dipole-electric dipole coupling mechanism, the Aromatic Chirality Method, are in good agreement with experimental curves; the method is thus applicable to complex systems without ambiguity and in an extremely facile manner.View full abstract -
Minoru Nakamizo, Sakumitsu Sakagami, Akira Takase1972 Volume 1 Issue 1 Pages 71-74
Published: January 05, 1972
Released on J-STAGE: April 19, 2006
JOURNAL FREE ACCESSOptical 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.View full abstract -
Mitsuo Tasumi1972 Volume 1 Issue 1 Pages 75-78
Published: January 05, 1972
Released on J-STAGE: April 19, 2006
JOURNAL FREE ACCESSResonance Raman spectrum of the starch–iodine complex was observed in dilute aqueous solution. Three Raman bands observed at 163, 115, and 56 cm−1 are assigned, respectively, to the antisymmetric stretching, symmetric stretching, and bending vibrations of the I3− ion aligned linearly in the helical starch molecule.View full abstract -
Yujiro Nomura, Shuji Tomoda, Yoshito Takeuchi1972 Volume 1 Issue 1 Pages 79-82
Published: January 05, 1972
Released on J-STAGE: April 19, 2006
JOURNAL FREE ACCESSThe reaction of cyclohexanone enamines with benzylidenaniline in acetic acid gave unexpected N-phenyldecahydroacridine derivatives. The formation of these compounds can be rationalized assuming the [2+2]cycloaddition between enamines and the Schiff base to form an azetidine at the initial stage.View full abstract -
Hirorau Sugeta, Akikatsu Go, Tatsuo Miyazawa1972 Volume 1 Issue 1 Pages 83-86
Published: January 05, 1972
Released on J-STAGE: April 19, 2006
JOURNAL FREE ACCESSRaman and infrared spectra of dialkyl disulfides were measured. Correlations of S–S and C–S stretching frequencies to molecular conformations were found for dialkyl disulfides.The molecular structure of cystine in aqueous solution was studied on the basis of the observed S–S and C–S stretching vibrations.View full abstract -
Hideki Sakurai, Mitsuo Kira, Mitsuru Ochiai1972 Volume 1 Issue 1 Pages 87-90
Published: January 05, 1972
Released on J-STAGE: April 19, 2006
JOURNAL FREE ACCESSThe frequencies of low-energy charge-transfer bands (CT-II) of 14 benzylsilane–tetracyanoethylene complexes were correlated with σI constants of substituents on silicon. The CT-II frequencies of benzylsilanes and other related compounds were also linearly related to their 1La absorption frequencies, a σ-π conjugation mechanism being discussed.View full abstract
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