bluuebunny/crossref_metadata_2025_split huggingface dataset:
APPARENT MOLAL VOLUMES OF POLYETHYLENIMINE HYDROCHLORIDE AND ITS OLIGOMERS IN DILUTE AQUEOUS SOLUTION
Authors: Sakurai Masao , Nakajima Toshio , Komatsu Tsuyoshi , Nakagawa Tsurutaro 
Published: July 2006

Abstract
The apparent molal volumes of polyethylenimine hydrochloride and its low-molecular-weight analogues have been measured as a function of concentration at 25°C. The partial molal volume of monomer unit increases with increasing the molecular weight of the polysalts. This has been interpreted in terms of two types of the overlapping of the electrostrictional effect on water molecules.
ON THE CARBON MONOXIDE ADDUCT FORMATION OF A COBALT–TETRAOXIME COMPLEX
Authors: Backes Joseph , Masuda Isao , Shinra Koichiro 
Published: July 2006

Abstract
In a hydrazine hydrate/DMA solution CoCl2·6H2O and CH3C(NOH)C(NOH)–(CH2)10–C(NOH)C(NOH)CH3 were found to absorb up to 0.5 mole of CO per 1 mole of cobaltous ion to form a CO adduct which releases CO in air to give a Co(II)–tetraoxime complex. A Co(I)-tetraoxime intermediate is considered to be the reactive species toward CO.
A NOVEL SYNTHESIS OF 2,4-DIOXO-1,2,3,4-TETRAHYDROPYRROLO[2,3-d]PYRIMIDINE DERIVATIVES
Authors: Senda Shigeo , Hirota Kosaku 
Published: July 2006

Abstract
6-Hydrazinouracil derivatives were allowed to react with ketones or aldehydes to give 5,6-disubstituted 2,4-dioxo-1,2,3,4-tetrahydropyrrolo[2,3-d]pyrimidine derivatives. The mechanism for the formation of these compounds is presented.
MECHANISM OF THE REDUCTION OF THIOBENZOPHENONE BY N-BENZYL-1,4-DIHYDRONICOTINAMIDE. A MODEL REACTION FOR BIOLOGICAL NAD(P)H-REDUCTION
Authors: Ohno Atsuyoshi , Kito Noboru 
Published: July 2006

Abstract
A charge-transfer intermediate has been detected, by ESR spectroscopy, for the reaction of thiobenzophenone with N-benzyl-1,4-dihydronicotinamide, a model of biological redox processes.
A NEW SYNTHESIS OF CARBAMATES. THE REACTION OF CARBON MONOXIDE WITH AMINE AND ALCOHOL IN THE CO-PRESENCE OF SELENIUM AND TRIETHYLAMINE
Authors: Kondo Kiyoshi , Sonoda Noboru , Tsutsumi Shigeru 
Published: July 2006

Abstract
Carbamates have been synthesized conveniently by the reaction of carbon monoxide with amine and alcohol by the use of selenium and triethylamine under mild conditions.
THE STERIC EFFECT ON AN ADDITION REACTION OF α-HYDROXYALKYL RADICAL TO DIETHYL MALEATE AND DIETHYL FUMARATE
Authors: Tokuda Masao , Chung Vo Van , Suzuki Akira , Itoh Mitsuomi 
Published: July 2006

Abstract
Radiation-induced addition reaction of ethanol and 1-propanol to diethyl maleate gives predominantly cis-γ-alkyl substituted paraconate, but the addition to diethyl fumarate produces trans- and cis-paraconates in almost the same yield. These results can be rationalized by the steric hindrance between α-hydroxyalkyl radical and maleate or fumarate ester.
THE NATURE OF METHYL RADICALS ADSORBED ON AN ALUMINA SURFACE
Authors: Fujieda Shigeaki , Setaka Morio , Kwan Takao 
Published: July 2006

Abstract
ESR 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.
PHOTOINDUCED REACTIONS. LXI. PHOTOCHEMICAL cis,trans-ISOMERIZATION OF 2,4,5-TRIPHENYLIMIDAZOLES
Authors: Matsuura Teruo , Ito Yoshikatsu 
Published: July 2006

Abstract
Irradiation of cis- (amarine) and trans- (isoamarine) 2,4,5-triphenylimidazolines in acetonitrile or benzene gave a photostationary mixture of cis- and trans-isomers. On irradiation in a dilute acetone solution, cis,trans-isomerization occurred only with isoamarine but not with amarine. In acetone, 2,4,5-triphenylimidazole was also formed. Two modes of mechanisms are proposed.
LIQUID CRYSTALLINE PROPERTIES OP LATERALLY SUBSTITUTED BENZYLIDENEANILINE DERIVATIVES
Authors: Murase Kei 
Published: July 2006

Abstract
A new series of anils, N-(p-alkoxybenzylidene)-2-methyl-4-octyloxyanilines, has been synthesized and investigated for the liquid crystalline property. These compounds exhibit nematic behavior in relatively low temperature range and make a well known change of nematic–isotropic transition temperatures. No smectic phase appears even in the case of longer chain derivatives.
SOLUBILITY AND ENTROPY OF SOLUTION OF IODINE IN ETHANOL-CYCLOHEXANE SOLUTIONS
Authors: Nakanishi Koichiro , Asakura Soto 
Published: July 2006

Abstract
The solubility of iodine in ethanol-cyclohexane solutions has been measured at 15.0, 25.0 and 35.0°C and the entropy of solution has been evaluated. It is found that the iodine complex formed in the mixed solutions is more stable than that in pure ethanol.
SOLVOLYSIS OF cis- AND trans-CHRYSANTHEMYL 3,5-DINITROBENZOATES. THE CONJUGATIVE TRANSMISSION ABILITY OF CYCLOPROPANE RING
Authors: Sasaki Tadashi , Eguchi Shoji , Ohno Masatomi , Umemura Takeaki 
Published: July 2006

Abstract
The solvolysis of the titled compounds was investigated. The trans-isomer was solvolyzed 5.5 times faster than the cis-isomer at 100°C, but the product compositions were similar. From these results, cis- and trans-homopentadienyl cations were postulated as the intermediates.
A NEW SPECTROPHOTOMETRIC DETERMINATION OF ANTIMONY WITH SILVER-DIETHYLDITHIOCARBAMATE AND o-PHENANTHROLINE MIXTURE IN CHLOROFORM
Authors: Yamamoto Yuroku , Kanke Makoto , Mizukami Yaeko 
Published: July 2006

Abstract
Antimony(III) is spectrophotometrically determined by reaction between stibine and a mixture of silver diethyldithiocarbamate and o-phenanthroline in chloroform. The red color appears in the chloroform phase, and the color developement may be due to the formation of colloidal silver by reduction with stibine. The method is fairly sensitive and selective.
HOMOGENEOUS ISOMERIZATION AND HYDROGENATION OF 1-PENTENE CATALYZED BY PLATINUM COMPLEXES
Authors: Kushi Kenji , Kanai Hiroyoshi , Tarama Kimio , Yoshida Satohiro 
Published: July 2006

Abstract
Isomerization and hydrogenation reactions of 1-pentene were catalyzed by zerovalent Pt complex, Pt(Pph3)3, in the presence of SnCl2, oxygen, aldehyde, and [PtH(Pph3)3]X (X=HSO4, NO3, ClO4) under mild conditions.
ALOENIN, A NEW BITTER GLUCOSIDE FROM ALOE SPECIES
Authors: Suga Takayuki , Hirata Toshifumi , Odan Michiyo 
Published: July 2006

Abstract
A new bitter glucoside, named aloenin, isolated from Aloe species has been established to be 2-(carbomethoxymethyliden)-4-(β-d-glucopyranosyloxy)-7-hydroxy-5-methylchromene (1). This is an unique example of naturally occurring chromene having the carbomethoxymethylidene group on C-2.
PREPARATION AND ABSOLUTE CONFIGURATION OF l-TARTRATO-BIS(1,10-PHENANTHROLINE) COBALT(III) COMPLEXES
Authors: Tatehata Akira 
Published: July 2006

Abstract
Three complexes, Δ-,Λ-[Co(phen)2(l-tart)]+, and cis-[Co(phen)2(OH2)(l-tart)]+, have been separated by ion-exchange Sephadex and characterized using the CD data. Two methods, empirical and nonempirical, have been used to assign the absolute configurations.
ELECTROCHEMISTRY OF 9,10-DICHLOROANTHRACENE AT LOW TEMPERATURES
Authors: Matsumoto Tamotsu , Sato Masanori , Hirayama Satoshi 
Published: July 2006

Abstract
A preliminary electrochemical investigation of 9,10-dichloroanthracene in aprotic solvents was performed at low temperatures as low as −60°C. The generated anion was shown to be stabilized as the temperature decreased. The use of an optical transparent electrode enabled us to obtain a new relationship between absorbance of radical ion and electrode potential.
PHOTOLYSIS OF 3,4:6,7-DIBENZOBICYCLO[3.2.2]NONA-3,6,8-TRIENE SYSTEM
Authors: Murata Ichiro , Sugihara Yoshikazu 
Published: July 2006

Abstract
Photolysis of 3,4:6,7-dibenzobicyclo[3.2.2]nona-3,6,8-trien-2-one (3) afforded exclusively 3,4-benzo-4a,9a-dihydrofluorenone (5) by way of [1,3]-acyl migration. Compound (4), exomethylene counterpart of the ketone (3), was regiospecifically isomerized to (7) by both the direct and sensitized irradiations.
ESR SPECTRA OF RADICAL ANIONS OF CALICENE DERIVATIVES.—LINE WIDTH ALTERNATION DUE TO ADJACENT n-PROPYL GROUPS
Authors: Niizuma Shigeya , Konishi Shiro , Kokubun Hiroshi , Koizumi Masao 
Published: July 2006

Abstract
ESR spectra of radical anions from 1,2,3,4-tetrachloro-5,6-diphenylcalicene (PhC) and 1,2,3,4-tetrachloro-5,6-di-n-propylcalicene (PrC) were studied. An unpaired electron spin is localized on 5- and 6-carbon atoms and its substituents for both. PrC shows a typical line width alternation, which was explained by a hindered internal rotation (the three-membered and five-membered rings are not coplanar) of two n-propyl groups with a barrier of ∼1.5 kcal/mole.
GEOMETRICAL ISOMERS OF 2,4-DINITROPHENYLHYDRAZONES OF SOME BENZOPHENONES. ISOLATION AND THEIR CONFIGURATIONAL ASSIGNMENTS
Authors: Tabata Masayoshi , Yokota Kazuaki , Takada Yoshiyuki , Suzuki Akira 
Published: July 2006

Abstract
Geometrical isomers of 2,4-dinitrophenylhydrazones of asymmetrically substituted benzophenones were isolated in pure form by recrystallization. The configurational assignments to their E- and Z-isomers were made using electronic and NMR spectral data.
On the Configurational Stability of the Chiral Disilanyl Radical Derived from (−)-1-Methyl-1,2,2,2-tetraphenyldisilane
Authors: Sakurai Hideki , Murakami Masashi 
Published: July 2006

Abstract
A 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.
PHOTOCHEMICAL REACTIONS BETWEEN DIBROMOMALEIC ANHYDRIDE AND BENZENE OR ITS HOMOLOGUES
Authors: Matsuo Taku , Tanoue Yutaka , Matsunaga Teruo , Nagatoshi Kikuo 
Published: July 2006

Abstract
On the irradiation of dibromomaleic anhydride in benzene or its substituted derivatives, α-aryl-α′-bromomaleic anhydrides were obtained. Further irradiation of the solution afforded phenan-threne-9,10-dicarboxylic anhydrides. In the first step, charge–transfer complexes also were found to participate in the reaction.
REACTIONS OF THE β-CIS ISOMERS OF ETHYLENEDIAMINE-N,N′-DIACETATO(ETHYLENEDIAMINE) COBALT(III) AND ETHYLENEDIAMINE-N,N′-DIACETATO(DIAMMINE) COBALT(III) COMPLEXES IN BASIC AQUEOUS SOLUTIONS
Authors: Kuroda Kashiro , Mohri Fumihito 
Published: July 2006

Abstract
Reactions of the β-cis isomers of ethylenediamine-N,N′-diacetato(ethylenediamine)cobalt(III) and ethylenediamine-N,N′-diacetato(diammine)cobalt(III) ions, β-cis-[Co(EDDA)(en)]+ and β-cis-(Co(EDDA)(NH3)2]+, have been examined in basic aqueous solutions. It has been found that, whereas the diammine complex hydrolyzes, the ethylenediamine complex isomerizes to the α-cis isomer. The routes of the reactions have been discussed.
PREPARATION AND PROPERTIES OF ORDERED PEROVSKITES (LaSr) (MnW)O6 AND (LaSr) (MgW)O6
Authors: Yoshimura Masahiro , Kamata Kiichiro , Nakamura Tetsuro 
Published: July 2006

Abstract
Ordered perovskites,(LaSr) (Mn2+W5+)O6 and (LaSr) (Mg2+W5+)O6, were newly prepared. The lattice constants,the electrical conductivities and the magnetic moments were studied. The results indicate that 3d5 electrons in Mn2+ are almost localized and that the interaction between Mn2+ and W5+ is fairly weak in this compound.
PHOTOCHEMICAL (2 + 2 + 2 + 2) CYCLOADDITION OF FURAN TO β-NAPHTHONITRILE
Authors: Sugioka Taizo , Pac Chyongjin , Sakurai Hiroshi 
Published: July 2006

Abstract
The photochemical reaction of β-naphthonitrile with furan affords a cage-adduct, 8-cyano-9,10-benzo-11-oxapentacyclo [4,2,2,1,2,50,3,80,4,7] undec-9-ene (I), in good yield.
THE STEREOCHEMISTRY OF THE INTERMEDIATE VINYL RADICAL IN THE RADICAL CYCLIZATION OF 1-ETHOXY-6-IODO-1-HEXYNE
Authors: Ohnuki Takashi , Yoshida Masayuki , Simamura Osamu 
Published: July 2006

Abstract
Reaction of 1-ethoxy-6-iodo-1-hexyne-3,3-d2 with tri-n-butyltin hydride in the presence of azobisisobutyronitrile gave chiefly (E)-2-ethoxymethylenecyclopentane-1,1-d2 by way of a radical cyclization. This fact demonstrates clearly that the radical addition took place to give an intermediate vinylic radical in a bent form, in which the half-filled sp2 hybrid orbital is disposed in the trans position with respect to the carbon group which has just added.
SELF-DIFFUSION COEFFICIENTS OF Tl AND Br IN TIBr SINGLE CRYSTAL
Authors: Khrihara Seiichi , Fueki Kazuo , Mukaibo Takashi 
Published: July 2006

Abstract
Self-diffusion coefficients of Tl and Br in TIBr single crystal were determined by the radioactive tracers and the serial sectioning technique. The results are as follows,
DTl*=(1.316±0.013)exp[−(27.44±0.55)⁄RT]cm2⁄sec (420–300°C)
DBr*=(1.227±0.013)×10−2exp[−(17.75±0.22)⁄RT]cm2⁄sec (420–250°C)
where the activation energy is expressed in unit of kcal/mol.
MAGNETIC INTERACTION IN THE SO-CALLED ZEROVALENT BERYLLIUM COMPLEX OF 2,2′-DlPYRIDYL, [Be(dipy)2]
Authors: Hara Ken-ichi , Inoue Motomichi , Kubo Masaji 
Published: July 2006

Abstract
The magnetic susceptibility and electronic absorption spectrum of [Be(dipy)2] indicate that two 2,2′-dipyridyl radical anions are coordinated to a divalent beryllium ion and that antiferromagnetic interaction (exchange integral, J/k = −11.6°K) operates between two radical ions within the molecule of [Be(dipy)2].
SYNTHETIC STUDIES OF CARBOHYDRATE DERIVATIVES WITH PHOTOCHEMICAL REACTION. IV. PHOTOCHEMICAL ADDITION REACTION OF SECONDARY ALCOHOLS TO METHYL 4,6-DI-O-ACETYL-2,3-DIDEOXY-α-d-erythro-HEX-2-ENOPYRANOSIDE
Authors: Matsuura Kazuo , Araki Younosuke , Ishido Yoshiharu , Satoh Shiro 
Published: July 2006

Abstract
Photochemical addition reaction of 2-propanol to methyl 4,6-di-O-acetyl-2,3-dideoxy-α-d-erythro-hex-2-enopyranoside was found to give methyl 4,6-di-O-acetyl-2,3-dideoxy-2-C-(1-hydroxy-1-methylethyl)-α-d-erythro-d-glycero-hexopyranoside in 66% yield. A series of secondary alcohols were also found to give such addition products in the photochemical reaction.
NOVEL TYPE OF REACTION OF HEXAMETHYLPHOSPHORIC TRIAMIDE WITH ALCOHOLS
Authors: Kawanisi Mituyosi , Arimatsu Seiji , Yamaguchi Ryohei , Kimoto Koichi 
Published: July 2006

Abstract
Upon being heated in HMPT, 1-adamantanol transformed into adamantane, whereas 2-adamantanol afforded 2-adamantyl tetramethylphosphorodiamidate. Diphenyl- and triphenyl-methyl alcohols were reduced into the corresponding hydrocarbons. Benzyl alcohol was found to give dibenzylmethylamine together with benzyldimethylamine.
POLYMERIZATION OF CYCLOPENTADIENE BY ACETYL PERCHLORATE
Authors: Kohjiya Shinzo , Yamashita Shinzo 
Published: July 2006

Abstract
Cationic polymerization of cyclopentadiene was carried out by acetyl perchlorate. The obtained value of the propagation rate constant for this system is equal to that of perchloric acid, which agrees well with the identity of counter ions (perchlorate anion) for both systems.
THE ABSORPTION OF CARBON MONOXIDE BY SILVER-COMPOUNDS
Authors: Souma Yoshie , Sano Hiroshi 
Published: July 2006

Abstract
Unstable carbonyl ion Ag(CO)n+ was prepared from Ag2O, Ag2SO4 or AgClO4 and carbon monoxide in H2SO4 or H2SO4–SO3 solution. The value of ″n″ was 0∼ 2.0 at −10∼30°C, under CO pressure of 1∼19 atm.
A NEW SYNTHESIS OF 2,5-DISUBSTITUTED TETRAZOLES VIA 1,5-DIPOLAR CYCLIZATION
Authors: Ito Suketaka , Tanaka Yumo , Kakehi Akikazu , Kondo Kenichi 
Published: July 2006

Abstract
2,5-isubstituted tetrazoles were obtained by the reaction of phenylsulfonylhydrazones of aromatic aldehydes with benzenediazonium salt in comparable yields. The reaction may proceed via the intramolecular cyclization of 1,5-dipoles generated from the formazans.
ORDERED AND DISORDERED HYDROGEN BONDS IN TIN(II) CHLORIDE DIHYDRATE FROM SINGLE CRYSTAL NEUTRON DIFFRACTION
Authors: Kiriyama Ryôiti , Kiriyama Hideko , Kitahama Katsuki , Nakamura Osamu 
Published: July 2006

Abstract
Single crystal neutron diffraction shows that the deuteron arrangements in SnCl2·2D2O are ordered and disordered, respectively, below and above Ttr. In the high temperature phase four deuterons of two non-equivalent water molecules distribute among seven sites with individual occupancy factors.
THE THERMAL DECOMPOSITION OF CH3NH2 IN SHOCK WAVES
Authors: Hidaka Yoshiaki , Saito Ko , Yamamura Hitoshi 
Published: July 2006

Abstract
The thermal decomposition of CH3NH2, diluted in Ar, has been studied behind reflected shock waves over the temperature range 1600 – 2100 K by the application of infrared emission techniques. It was found that apparent activation energy in the CH3NH2 decomposition was 38.6 kcal/mol.
PHOTO-SENSITIZED ISOMERIZATION OF 4-HOMOADAMANTENE IN PHOTIC MEDIA
Authors: Yamaguchi Ryohei , Arimatsu Seiji , Kawanisi Mituyosi 
Published: July 2006

Abstract
UV-irradiation of 4-homoadamantene (I) in acetic acid in the presence of BTX afforded 2,4-dehydrohomoadamantane (II), isomeric to I, together with 4-homoadamantyl and 3-homoadamantyl acetates (IIIa and IVa). Photo-isomerization of I into II was also observed with added catalytic amount of methanesulfonic acid.
PRESSURE EFFECT ON β RELAXATION PROCESS IN CHLORINATED POLYETHYLENE AND POLYVINYLACETATE
Authors: Naoki Motosuke , Kokubo Atsuro , Nose Takuhei 
Published: July 2006

Abstract
The β relaxation processes of chlorinated polyethylene vulcanizate (CPE) and polyvinylacetate(PVAc) were investigated by dielectricity in a frequency range of 30∼3×105 Hz, a temperature range of −50∼20 °C and a pressure range of 1∼600 Kg/cm2. Both superpositions on temperature and pressure were possible for CPE, but not for PVAc, and the behaviors of the activation volume ΔV≠ in CPE and PVAc were significantly different from each other.
STUDIES OF SALT SOLUTION AEROSOLS. XI. THE COAGULATION RATE OF AN AQUEOUS SALT SOLUTION AEROSOL OF SODIUM SULFATE AND ITS APPLICATION TO THE ESTIMATE OF THE STABILITY OF AEROSOLS
Authors: Ueno Yasuo , Sano Isamu 
Published: July 2006

Abstract
The coagulation rate of an aqueous salt solution aerosol of Na2SO4 has been determined in terms of number and mass concentration under various conditions, with the finding that the rate constant in mass concentration might be useful as a measure of coagulation rate. Some examples of its application are described in detail.
THE INTERACTION OF p-DINITROBENZENE WITH SODIUM HYDROXIDE IN AQUEOUS DIMETHYL SULFOXIDE
Authors: Abe Takehiro 
Published: July 2006

Abstract
The interaction of p-dinitrobenzene with hydroxide ion in aqueous dimethyl sulfoxide was studied by visible spectroscopy. The formation of the p-dinitrobenzene anion-radical was initially found. From the time-dependence of the radical, the radical seems to be a precursor in the displacement of one nitro group.
FORMATION OF RADICAL CATIONS FROM 1,4-DIALKOXYBENZENES IN NITRO COMPOUNDS IN THE PRESENCE OF AlCl3
Authors: Niskenaga Akira , Hayashi Hidetoshi , Matsuura Teruo 
Published: July 2006

Abstract
The electron transfer from 1,4-dialkoxybenzenes giving rise to the corresponding radical cations takes place not only in nitromethane but also in other nitro compounds, aliphatic and aromatic one, in the presence of AlCl3 or BF3. The reaction is reversible and affected by substitution and concentration of the 1,4-dialkoxybenzenes and nature of the nitro compounds. (RNO2)2AlCl2+ may be suggested to be the electron acceptor in the system.
THE CHLOROPHOSPHONATION OF TOLUENE AND p-XYLENE
Authors: Okada Toshihiro , Okamoto Yoshiki , Sakurai Hiroshi 
Published: July 2006

Abstract
In the chlorophosphonation of toluene and p-xylene, tolylphenylmethanes (I) and 2,4′,5-trimethyldiphenylmethane (II) were obtained as major products in addition of benzyl- (III) and p-methylbenzylphosphonic dichloride (IV). I and II may be formed by benzylation of toluene or p-xylene with benzyl cation, resulted from electron transfer from benzyl radical to phosphorus trichloride.
METASTABLE CRYSTAL IN THIN FILMS OF MALEIC ACID ON METAL SURFACES
Authors: Suzuki Koichi , Hatta Aritada , Suëtaka Wataru 
Published: July 2006

Abstract
Infrared spectra of thin maleic acid films formed on metal surfaces by vacuum deposition showed that the crystal structure in the thin films changes depending upon the condition of the metal surface. The films grown on fresh surfaces had a metastable crystal structure, in which hydrogen bonds are weaker than in the ordinary crystal.
A CONVENIENT PREPARATIVE METHOD OF α-CHLORO KETONES
Authors: Kuwajima Isao , Shinozaki Hiraku , Hayakawa Susumu 
Published: July 2006

Abstract
Rearrangement reaction of 1-substituted 2,2-dichloroethanol has been studied and it has been found that the corresponding α-chloro ketone is obtained in good to excellent yield by treating the alcohol with 2∼3 equivalents of n-butyllithium in dimethoxyethane.
ROLE OF THE PARTIALLY-OCCUPIED d-ORBITALS OF PHOSPHONIUM COMPOUNDS IN THE CATALYTIC ACTIVATION OF MOLECULAR OXYGEN IN LIQUID-PHASE OXIDATION
Authors: Ohkubo Katsutoshi , Sakamoto Hiroyuki 
Published: July 2006

Abstract
The catalytic activation of the ground state 3Σg− O2 by phosphonium compounds in the liquid-phase oxidation of hydrocarbons was demonstrated on the basis of ultraviolet spectroscopic measurements and ASMO-SCF calculations. The said compounds, namely, activate the 3Σg− O2 mainly by the aid of the electron-transfer from the partially-occupied phosphorus dx2–y2-orbital of the formers to the 1πg-orbitals of the latter through the favorable d-π orbital-overlaps.
AN INVERSION OF THREONINE TO ALLOTHREONINE IN THE N,O-MIGRATION REACTION OF THREONINE PEPTIDES IN CONCENTRATED SULFURIC ACID
Authors: Wakamiya Tateaki , Tarumi Yuzo , Shiba Tetsuo 
Published: July 2006

Abstract
In a N,O-migration reaction of peptides containing β-hydroxy-α-amino acids in strong acids, it was generally accepted that the configuration on β-carbon atom is retained through the reaction. However, according to our recent investigation using concentrated sulfuric acid as strong acid, a configurational change was observed in the migration reaction. Thus, the threonine residue in peptides was converted to allothreonine residue on the reaction. For the migration reaction accompanying an inversion of configuration, we suggested the mechanism involving SN2 elimination of O-sulfate of threonine residue.
SALTING-OUT EFFECT IN SOLVENT EXTRACTION(I) SPECTROPHOTOMETRIC DETERMINATION OF IRON(III) WITH 2-THENOYLTRIFLUOROACETONE
Authors: Kawamoto Hiroshi , Akaiwa Hideo 
Published: July 2006

Abstract
A new solvent extraction technique using salting-out effect is described and shown to be applicable to the rapid and selective determination of iron(III).
A CONVENIENT METHOD FOR THE HYDROLYSIS OF VINYL CHLORIDES TO KETONES
Authors: Mukaiyama Teruaki , Imamoto Tsuneo , Kobayashi Susumu 
Published: July 2006

Abstract
A new and useful method for the hydrolysis of vinyl chlorides was investigated by the use of EtSH and TiCl4. Various vinyl chlorides, such as α-chlorostilbene, 1,3-diphenyl-1-chloro-1-propene and 2,6-dimethyl-4-chloro-3-heptene, were hydrolyzed to corresponding ketones in good yields at room temperature.
SELECTIVE FORMATION OF METHYL VINYL KETONE FROM ACETONE AND METHANOL WITH SILICA-MAGNESIA BASE CATALYST
Authors: Okada Masahide , Asami Yukio 
Published: July 2006

Abstract
Silica-magnesia was examined as catalyst for the said reaction and was found to give nearly 100% selectivity. Loading of Ag as well as MnO2 resulted in an increase of the activity of the catalyst but was not detrimental to the selectivity. The course of the reaction was briefly discussed.
A NOVEL CATALYST SYSTEM FOR THE ULLMANN CONDENSATION IN AQUEOUS SOLUTION. REACTION OF A HALOGENOANTHRAQUINONE WITH ANILINE
Authors: Tuong Tran Dinh , Hida Mitsuhiko 
Published: July 2006

Abstract
The yield of the Ullmann condensation of sodium 1-amino-4-bromoanthraquinone-2-sulfonate with aniline in an alkaline aqueous solution was improved markedly by using the system [Cu2+ + metal reducing agent (such as Fe2+, Ti3+, Sn2+)] compared with the conventional procedures using only copper(Cu2+ or Cu+) salts.