bluuebunny/crossref_metadata_2025_split huggingface dataset:
LIQUID CRYSTALS COMPOSED OF N-ACYLAMINO ACID. I. CIRCULAR DICHROISM IN LIQUID CRYSTALS COMPOSED OF N-LAUROYL-l-GLUTAMIC ACID AND AROMATIC SOLVENTS
Authors: Sakamoto Kazutami , Yoshida Ryonosuke , Hatano Masahiro 
Published: July 2006

Abstract
Amorphous powdered N-lauroyl-l-glutamic acid (LGA) soaked into aromatic solvents such as benzene showed birefringence under a polarizing microscope and a positive CD band. An achiral dye molecule dissolved in this system showed induced CD. From these results it is concluded that the LGA-benzene system is a cholesteric liquid crystalline phase.
PREPARATION OF CARBOXYLIC ACID FLUORIDES USING HEXAFLUORO-1,2-EPOXYPROPANE
Authors: Ishikawa Nobuo , Sasaki Shigekuni 
Published: July 2006

Abstract
Carboxylic acid fluorides were prepared by treating free carboxylic acids with hexafluoro-1,2-epoxypropane in the presence of triethylamine or N,N-dimethylaniline under mild conditions.
THE r1-r1 INTRACONFIGURATIONAL ELECTRONIC TRANSITION WITHIN t2g4 OF THE CHLORO–BROMO MIXED HALOGENO COMPLEXES OF Os(IV)
Authors: Urushiyama Akio 
Published: July 2006

Abstract
The electronic spectra of the chloro–bromo mixed halogeno complex anions, [OsBrxCl6−x]2− (x=0–6), in K2SnCl6 matrix were measured in the region of 16000–18000 cm−1. In this region, intraconfigurational electronic transition within t2g4 was observed in the absorption and emission measurements. The mixed halogeno complex anions showed band features markedly different from those of the complexes in Oh symmetry.
DIMERIZATION OF ANION RADICAL IN MICELLES
Authors: Yamagishi Akihiko , Watanabe Fumiyuki 
Published: July 2006

Abstract
Sodium salt of 2,3-dichloro-5,6-dicyano-p-benzoquinone is found to dimerize in chloroform when it is solubilized by dodecylpyridinium chloride micelles. The enthalpy and entropy changes of dimerization equilibrium have been determined at various surfactant concentrations (0.003–0.07 M). The temperature-jump measurements show that the relaxation time of dimerization is less than 1.5×10−5 s. The results indicate that the dimerization occurs in the micelle interior.
THE TERMINAL-CARBON-BONDED PALLADIUM(II) COMPLEXES OF ACETYLACETONE
Authors: Kanda Zenjiro , Nakamura Yukio , Kawaguchi Shinichi 
Published: July 2006

Abstract
Dichlorobis(benzonitrile)palladium(II) reacts with acetylacetone in acetone at room temperature to afford an insoluble product PdCl (C5H7O2) [1]. The reactions of 1 with a base L such as triphenylphosphine and triphenylarsine, or lithium chloride yield PdCl(C5H7O2)L or PdCl2(C5H7O2)−, respectively. The σ,η-coordination of the acetylacetonate ligand in these complexes was deduced by the IR and NMR studies. The compound 1 reacts with 2,2′-bipyridine to produce PdCl(C5H7O2)(bipy), in which the terminal-carbon-bonded acetylacetonate ligand attains the keto-enol equilibrium in solution.
FORMATION AND SOLUBILITY OF BASIC LEAD CHLORIDES AT DIFFERENT PH VALUES
Authors: Kiyama Masao , Murakami Kenso , Takada Toshio , Sugano Izuru , Tsuji Toshiro 
Published: July 2006

Abstract
Suspensions prepared by mixing solutions of NaOH and PbCl2 in various mol ratios were subjected to aging at 25, 50 and 80°C. Formation of three kinds of basic lead chlorides takes place, depending mainly on the pH. Their solubilities in the suspension media with various pH values at 25°C were determined.
FORMATION OF CARBONYL YLIDE BY THE INTRAMOLECULAR CARBENIC REACTION. DISROTATORY RING CLOSURE OF CARBONYL YLIDE TO EPOXIDE
Authors: Ibata Toshikazu 
Published: July 2006

Abstract
Copper acetylacetonate catalyzed decomposition of 8-methoxycarbonyl-1-α-diazoacetylnaphthalene in benzene solution gave 2-hydroxy-3-methoxyphenalenone and 2,3-dihydroxyphenalenone via thermally forbidden disrotatory ring closure of intermediate carbonyl ylide to epoxide and successive cleavage of the epoxide.
2-HALO-3-ETHYLBENZOTHIAZOLIUM SALTS AS REACTIVE COUPLING REAGENTS
Authors: Mukaiyama Teruaki , Hojo Ko 
Published: July 2006

Abstract
2-Halobenzothiazolium fluoroborate, when treated with a mixture of equimolar amounts of carboxylic acids and alcohols in the presence of base such as tertiary amines, gave the corresponding carboxylic esters in good yields.
PHOTOCHEMICAL CYCLOADDITION OF 5-METHYL-2,3-DIHYDRO-3-FURANONE TO OLEFINS
Authors: Ogino Toshio , Kubota Tetsuo , Manaka Kiyoshi 
Published: July 2006

Abstract
Photochemical reactions of 5-methyl-2,3-dihydro-3-furanone 1 with methyl acrylate, vinyl acetate, and cyclopentene have been examined and found to give adducts having 4-oxa-bicyclo[3.2.0]heptanone structure in all the cases. Orientation and stereochemistry of the adducts were deduced on the basis of NMR studies using shift reagent. Stereospecificity was observed with the head-to-head adducts of the acyclic olefins. The cyclopentene adducts were transformed to a bicyclic enonealdehyde 22 by subsequent modification.
A NEW METHOD FOR THE PREPARATION OF α-KETO CARBOXYLIC ESTERS BY THE PHOTO-OXIDATION OF 1-(1-ETHOXYCARBONYLALKYL)PYRIDINIUM IODIDES
Authors: Takeda Takeshi , Mukaiyama Teruaki 
Published: July 2006

Abstract
α-Keto carboxylic esters were obtained in good yields by the photo-oxidation of 1-(1-ethoxycarbonylalkyl)pyridinium iodides in the presence of tetra-n-butylammonium iodide. Similarly, 1-methyl-2-(1-ethoxycarbonylalkylthio)pyridinium iodides were oxidized to give α-keto carboxylic esters.
MICROWAVE SPECTRA OF FLUOROMETHYLMETHYLETHER
Authors: Nakagawa Jun , Hayashi Michiro 
Published: July 2006

Abstract
Microwave spectra of fluoromethylmethylether and its two deuterated species were studied. This molecule is mainly in the gauche form with the skeletal dihedral angle of 69°. The CH3 internal rotation barrier was calculated from the observed splittings of the spectra as 1500 ±30 cal/mol and the dipole moment was determined by the Stark effect measurements of the spectra as 1.744 ± 0.029 D for the normal species.
METAL-CATALYZED ORGANIC PHOTOREACTIONS PHOTOREACTION OF AROMATIC NITRILES IN METHANOL IN THE PRESENCE OF TITANIUM(IV) CHLORIDE
Authors: Sato Tadashi , Yoshiie Shigeo 
Published: July 2006

Abstract
Aromatic nitriles, upon irradiation in methanol in the presence of TiCl4, afforded substituted oxazolidines, probably through electron transfer from methanol to nitriles mediated by titanium.
MOLECULAR WEIGHT DISTRIBUTION OF POLYCARBOSILANE AS A STARTING MATERIAL OF THE SILICON CARBIDE FIBER WITH HIGH TENSILE STRENGTH
Authors: Yajima Seishi , Liaw Chiu-fong , Omori Mamoru , Hayashi Josaburo 
Published: July 2006

Abstract
Polycarbosilane was fractionated by fractional solution. Relation between MW distribution and spinnability of polycarbosilane was obtained.
THE PREPARATION AND REACTIONS OF UNSYMMETRICAL THIOCARBONYL DISULFIDES
Authors: Katada Tomonori , Tsuji Sadaaki , Sugiyama Tatsushi , Kato Shinzi , Mizuta Masateru 
Published: July 2006

Abstract
Unsymmetrical thiocarbonyl disulfides (3) have been easily synthesized in good yields by the reaction of piperidinium dithiocarboxylates with sulfenyl chlorides. In the reaction of these disulfides with nucleophiles (amine and metal alkoxide), both thiocarbonyl carbon and sulfenyl sulfur atom seem to be attacked by nucleophiles. By desulfurization with triphenylphosphine thiocarbonyl disulfides converted into corresponding dithioesters in high yields.
THE ISOTOPE EFFECT IN THE Cd-PHOTOSENSITIZED REACTION OF METHANOL
Authors: Tsunashima Shigeru , Morita Kuniko , Sato Shin 
Published: July 2006

Abstract
The isotope effect in the Cd-photosensitized reaction of methanol has been investigated using CH3OH, CH3OD, and CD3OD. The quenching efficiencies for the 326.1 nm resonance line were 1 : 0.31 : 0.31 in the order of CH3OH, CH3OD, and CD3OD. The intensity of the emission from the intermediate complex between an excited cadmium atom and methanol was also measured. The intensity ratio was 1 : 3.1 : 3.1 in the order of CH3OH, CD3OD, and CD3OD. The band-shape of the emission was not affected by the substitution of D atoms. These results are compared with the isotope effect recently reported in the study of the Hg-photosensitized reaction of methanol.
LINEAR DICHROIC SPECTRA OF DNA-CRYSTAL VIOLET COMPLEXES UNDER FLOW FIELDS
Authors: Yamaoka Kiwamu , Hashimoto Hideko 
Published: July 2006

Abstract
The linear dichroic spectra of DNA-Crystal Violet complexes under flow were measured in the visible absorption region of Crystal Violet at three mixing ratios. The reduced dichroism was both positive (&gt;620 nm) and negative (620–400 nm). The average angles between the transition moments and the orientation axis were estimated.
STUDIES OF NITROGEN–PHOSPHORUS COMPOUNDS. XXVII.THE HYDROLYSIS OF TETRAMERIC PHOSPHORUS NITRIDE DIAMIDE
Authors: Kobayashi Etsuro 
Published: July 2006

Abstract
When an aqueous solution of N4P4(NH2)8 was refluxed at 100°C, the compound was initially hydrolyzed to PO(NH2)3 and P2O2NH(NH2)4, and they were converted into PO(ONa)(NH2)2. The rate of hydrolysis was remarkably slow at room temperature, however, the composition of the hydrolysis products was similar to that at 100°C. In a sosium hydroxide solution, N4P4(NH2)8 was converted directly into PO(ONa)(NH2)2 at an elevated temperature. An acid-hydrolysis behavior was resembled that in the neutral-hydrolysis, but the reaction was accelerated with an acid strength. The formation of tetrametaphosphimate by the hydrolysis of N4P4(NH2)8, that had been hitherto claimed, could not be recognized in this study.
ONE-STEP SYNTHESIS OF 4-METHYLCHROMANS FROM PHENOL DERIVATIVES AND 3-BUTENYL OR 3-METHYL-3-BUTENYL DIPHENYL PHOSPHATE
Authors: Butsugan Yasuo , Tsukamoto Hideshi , Morito Naoya , Bito Tadaaki 
Published: July 2006

Abstract
3-Butenyl or 3-methyl-3-butenyl diphenyl phosphate reacted with phenols or phenyl ethers in the presence of a Lewis acid under mild conditions to give selectively 4-methyl or 4,4-dimethylchromans in 10–53% yields.
MAGNETIC PROPERTIES OF Dl-PENICILLAMINE-Cu(I,II) COMPLEX
Authors: Miyoshi Kiyonori , Ishizu Kazuhiko , Sugiura Yukio 
Published: July 2006

Abstract
The complex, Dl-penicillamine-Cu(I,II), was investigated by ESR in solution. The spin Hamiltonian parameters determined are g|| = 2.414, g⊥ = 2.080, and A|| = 123 G. The paramagnetic susceptibility of the solid complex measured from 77°K to 230°K followed the Curie–Weiss law with a Curie constant of 0.45°Kemu/mol, a Weiss constant of −1.5°K. A spin concentration is obtained to be 99% as pure doublet, S = 1/2, based on the molecular composition proposed by Sugiura.
NEW EQUILIBRIA IN ALLYL(CHLORO)PLATINUM(II) COMPLEXES
Authors: Yoshida Gohei , Numata Shigeaki , Kurosawa Hideo 
Published: July 2006

Abstract
The complexes, Pt(allyl)ClL2 (allyl= CH2CH=CH, CH2CH=CHMe, CH2CMe=CH2; L= PPh3, AsPh3, show varying degrees of equilibrium processes, depending on the nature of the allyl moieties, L, and solvents. A convenient method to synthesize complexes of the type, Pt(π-allyl )CIL, is also described.
SOLVENT, TEMPERATURE, AND PRESSURE EFFECTS ON THE REACTION BETWEEN TETRACYANOETHYLENE AND STYRENE
Authors: Nakahara Masaru , Tsuda Yasutaro , Sasaki Muneo , Osugi Jiro 
Published: July 2006

Abstract
A new absorption band discovered in the region 300–350 nm by varying solvents, temperature, and pressure was assigned to the zwitterionic intermediate postulated so far in the thermal (2+2) cycloaddition. The PMR spectrum was taken at low temperature. The rate of the intermediate formation depended strongly on solvent polarity.
HIGH STEREOSELECTIVITY IN N,N′-(S,S)-1,2-CYCLOHEXYLENEBIS(SALICYLIDENEIMINATO) (sal2-(S,S)-chxn) COBALT (III) COMPLEXES CONTAINING AMINO ACIDS AND OPTICAL RESOLUTION OF AMINO ACIDS WITH COBALT(II)-sal2-(S,S)-chxn
Authors: Fujii Yuki , Sano Mitsuo 
Published: July 2006

Abstract
A series of new mixed ligand cobalt(III) complexes with the general formula of [Co (sal2-(S,S)-chxn) (aa)] (aa = anion of gly, ala, val, leu, or thr) has been prepared. They take stereoselectively Λ-cis-β1(fac)-structure. The optical resolution of eleven amino acids with cobalt(II)-sal2-(S,S)-chxn complex has been examined. The optical purities of the amino acids resolved in 1 : 2 reaction molar ratio have been 8–50%.
TRIFLUOROMETHANESULFONIC ACID CATALYZED REARRANGEMENT OF HOMOADAMANTANE
Authors: Takaishi Naotake , Inamoto Yoshiaki , Fujikura Yoshiaki , Aigami Koji , Golicnik Bogdan , Mlinaric-Majerski Katica , Majerski Zdenko , Osawa Eiji , Schleyer Paul von Ragué 
Published: July 2006

Abstract
Homoadamantane (1) rearranges under CF3SO3H catalysis to 1- and 2-methyladamantane (2, and 3, respectively), tricyclo [5.3.1.03,8] undecane (4), exo-tricyclo[5.3.1.01,5] undecane (5), tricyclo[6.3.0.01,5] undecane (6), exo-tricyclo[5.3.1.02,6] undecane (7), and an unknown tricycloundecane (8). That the 2-homoadamantyl cation (11) is the key intermediate in going from 1 to 4 is indicated by the result of hydride transfer reduction of 2-homoadamantanol (17) in H2SO4.
PHOTOLYSIS OF SILYLDIAZOMETHANE. THE MIGRATING TENDENCIES OF THE GROUPS ON SILICON ATOM
Authors: Ando Wataru , Sekiguchi Akira , Migita Toshihiko 
Published: July 2006

Abstract
Photolysis of silyldiazomethane in alcohols gave alkoxysilanes. The reaction probably involves isomerization of silylcarbene to Si=C double bond intermediates. The migrating ability of the groups on silicon atom decreases in the order; methyl &gt; phenyl≈benzyl group.
LABILE HALOGENATED MONOTERPENES FROM DESMIA (CHONDROCOCCUS) JAPONICUS HARVEY
Authors: Naya Yoko , Hirose Yoshio , Ichikawa Nobutaka 
Published: July 2006

Abstract
Structures of labile halogenated monoterpenes (V, VI) have been established as (Z)- and (E)-10-bromo-3-chloro-α-myrcene by spectroscopic methods.
THE CONFIGURATION OF OXYLUBIMIN
Authors: Katsui Nobukatsu , Kitahara Haruo , Yagihashi Fujio , Matsunaga Akira , Masamune Tadashi 
Published: July 2006

Abstract
The configuration of oxylubimin was determined on the basis of the NMR spectrum in the presence of the shift reagent and the CD spectrum of oxylubimin derivatives.
A NOVEL METHOD OF PREPARATION FOR ORTHOCARBOXYLATES FROM DITHIOCARBOXYLATES AND DIALKOXYDIBUTYLSTANNANES
Authors: Sakai Shizuyoshi , Fujinami Tatsuo , Kosugi Kunio , Matsnaga Kaoru 
Published: July 2006

Abstract
The reaction of methyl dithiocarboxylates with dialkoxydibutylstannanes at 60-95°C afforded the corresponding trialkyl orthocarboxylates in good yields.
COLLOIDAL RHODIUM IN POLYVINYL ALCOHOL AS HYDROGENATION CATALYST OF OLEFINS
Authors: Hirai Hidefumi , Nakao Yukimichi , Toshima Naoki , Adachi Koichi 
Published: July 2006

Abstract
A colloidal rhodium has been prepared by reduction of rhodium(III) chloride with methanol in the presence of polyvinyl alcohol. The particle size distribution of the metallic rhodium is narrow ranging from 30 to 70 Å with a maximum at 35 Å. The colloidal dispersions in methanol-water solutions are effective for the hydrogenation of olefins at 30°C under an atmospheric hydrogen pressure.
SYNTHESIS OF CYCLOPROPYL ESTERS FROM SILYL ENOL ETHERS
Authors: Ryu Ilhyong , Murai Shinji , Otani Shoji , Sonoda Noboru 
Published: July 2006

Abstract
Cyclopropyl esters are conveniently prepared by direct addition of acid halides to the reaction mixture of Simmons–Smith reagent and silyl enol ethers. In this reaction, zinc iodide, a by-product of the Simmons–Smith reaction, operates as a Friedel–Crafts-type catalyst to activate acid halides.
A NEW METHOD FOR THE TRANSFORMATION OF 1,2-EPOXIDES TO 1,2-DICHLOROALKANES
Authors: Echigo Yoshiaki , Watanabe Yutaka , Mukaiyama Teruaki 
Published: July 2006

Abstract
Treatment of 1,2-epoxides with 2-chloro-3-ethylbenzoxazolium tetrafluoroborate and tetraethylammonium chloride affords 1,2-dichloroalkanes in good yields under mild conditions with good stereospecificity.
SYNTHESIS OF A NEW HEXADENTATE LIGAND AND MEASUREMENT OF STABILITY CONSTANTS OF ITS METAL CHELATES
Authors: Tanaka Norio , Kobayashi Yukiko , Takamoto Susumu 
Published: July 2006

Abstract
A new macrocyclic hexamine ligand, 1,2-di(1,4,7-triaza-1-cyclononyl)ethane, was synthesized and its protonation and chelate formation constants with manganese(II), cadmium(II), cobalt(II), zinc(II), and nickel(II) were measured at 25°C in 1 M KNO3.
HOMOGENEOUS SELECTIVE HYDROGENATION OF CYCLODODECATRIENE, CYCLOOCTADIENE, AND 1,6-DIENES TO THE CORRESPONDING MONOENES CATALYZED BY RuCl2(PPh3)3
Authors: Tsuji Jiro , Suzuki Hirohisa 
Published: July 2006

Abstract
Cyclododecatriene was hydrogenated to cyclododecene with a high selectivity by using RuCl2(PPh3)3 as catalyst at room temperature. Selective hydrogenation of cyclooctadiene to cyclooctene was also achieved. Ethyl 2-acetyl-4,9-decadienoate was converted to 2-acetyl-4-decenoate with 100% selectivity at room temperature.
NOVEL ASPECTS OF ASYMMETRIC BROMOLACTONIZATION REACTION
Authors: Terashima Shiro , Jew Sang-sup , Koga Kenji 
Published: July 2006

Abstract
Asymmetric bromolactonization reaction was found to proceed highly stereo- and regiospecifically via the transition state such as 5II when (S)-N-(α,β-unsaturated acyl)-α-amino acid, where two alkyl groups are located at the α and β positions in a cis relationship and free rotation of the bond between asymmetric carbon and nitrogen is prohibited due to cyclic structure, is used as a reaction substrate.
NOVEL KINETIC RESOLUTION OF 2-DIMETHYLAMINOPROPIOPHENONE DURING ASYMMETRIC CATALYTIC HYDROSILYLATION
Authors: Yamamoto Keiji , Tsuruoka Katsuhiko , Tsuji Jiro 
Published: July 2006

Abstract
Kinetic resolution was observed when (±)-2-dimethylaminopropiophenone was allowed to react with one-half equivalent of diphenylsilane in the presence of rhodium(I)-(−)-DIOP as catalyst. The recovered amino ketone was found to be (R)-(+)-enantiomer of 23% optical purity, while asymmetrically hydrosilylated products, after hydrolysis, were (1S, 2S)-(+)-pseudomethylephedrine and (1R, 2S)-(−)-methylephedrine in 27% and 20% ee, respectively.
PREPARATION OF ALCOHOLS VIA HYDROALUMINATION OF OLEFINS BY USE OF THE Cp2TiCl2–LiAlH4 REAGENT SYSTEM
Authors: Isagawa Kakuzo , Tatsumi Kimio , Otsuji Yoshio 
Published: July 2006

Abstract
The oxidation of lithium alkylhydroaluminates, which are produced by the catalytic hydroalumination of 1-olefins with the Cp2TiCl2–LiAlH4 reagent system, gives the corresponding 1-alcohols. By a similar method, dienes having a double bond at the terminal position can be converted selectively to the corresponding alken-1-ols, in which the internal double bond remains intact. The yields of alcohols depend on the oxidizing agents used.
CATALYTIC ACTIVITY AND THE GLASS TRANSITION OF POLYMER-BOUND METAL COMPLEX CATALYST
Authors: Uematsu Takayoshi , Saito Fumiyoshi , Miura Masatoshi , Hashimoto Hidehisa 
Published: July 2006

Abstract
Rhodium(I)-complex was bound on a ternary copolymer of styrene (ST), divinyl benzene (DVB) and diphenyl-p-styrylphosphine (DPSP). The hydrogenation of ethylene was studied over this polymer-bound metal complex, at 40∼90 °C in gas phase. The catalytic activity changed abruptly at around 68 °C due to the reversible discontineous change In the pre-exponential factor, which was ascribed to the glass transition of the polymer.
13C NMR SPECTRA OF 1,3-DITHIOLYLIUM TETRAFLUOROBORATE AND RELATED COMPOUNDS
Authors: Sakamoto Kazuhiko , Nakamura Nobuo , Oki Michinori , Nakayama Jyuzo , Hoshino Masamatsu 
Published: July 2006

Abstract
13C NMR spectra of 1,3-dithiolylium tetrafluoroborate and related compounds are recorded. The 13C spectra offer firm proof for the presence of aromatic character in the 1,3-dithiolylium ring, which was deduced from the 1H NMR spectral data.
THE DIELS–ALDER REACTION OF 2,4-DIPHENYLTHIOPHENE AND 2,5-DIPHENYL-1,4-DITHIIN WITH DIMETHYL ACETYLENEDICARBOXYLATE. NOVEL FORMATIONS OF THE NAPHTHO[2,1-b] AND [1,2-b]THIOPHENES
Authors: Kobayashi Keiji , Mutai Kiyoshi 
Published: July 2006

Abstract
The naphtho[2,1-b]thiophene 5 was obtained by the reactions of dimethyl acetylenedicarboxylate (2) with 2,4-diphenylthiophene (1) and with 2,5-diphenyl-1,4-dithiin (6) as well, whereas the reaction of 6 with 2 under the mild conditions yielded the naphtho[1,2-b]thiophene 8.
THERMOCHROMISM OF METAL CHELATES WITH TRIPHENYLMETHANE COMPLEXONS IN AQUEOUS SOLUTIONS
Authors: Nakada Shoji , Yamada Mutsuo , Ito Tasuku , Fujimoto Masatoshi 
Published: July 2006

Abstract
Reversible thermochromisms are found for about thirty kinds of metal complexes of triphenylmethane complexons in aqueous solutions. The color changes are primarily due to the equilibria between the complex having an uncoordinated phenolic hydroxyl group and the complex having a coordinated phenolate group.
2,3:6,7:8,9:12,13-TETRABENZO[13]ANNULENYL ANION
Authors: Willner Itamar , Gamliel Asher , Rabinovitz Mordecai 
Published: July 2006

Abstract
2,3:6,7:8,9:12,13-tetrabenzo[13]annulenyl anion 1 was prepared from the corresponding hydrocarbon 2. The effect of benzannelation and the spatial structure of the anion is derived from its proton nmr spectrum.
PROTON-TRANSFER REACTION OF 2,4-DIHYDROXYAZOBENZENE IN AQUEOUS SOLUTION
Authors: Yoshida Noboru , Fujimoto Masatoshi 
Published: July 2006

Abstract
The recombination reaction of 2,4-dihydroxyazobenzene (DAB;H*HA) with the hydroxide ion is investigated by temperature-jump method in 2% (v/v) ethanol-water solution. The presence of the minimum observed in the τ−1 vs. \barCOH plot is interpreted by assuming a pre-equilibrium involving an intermediate H*A− with an undissociated para-OH, which has not been pointed out so far.
SOME PALLADIUM(II) AND PLATINUM(II) AMINE COMPLEXES CONTAINING β-DIKETONATE ANIONS IN THE OUTER SPHERE
Authors: Okeya Seichi , Onuki Yukio , Nakamura Yukio , Kawaguchi Shinichi 
Published: July 2006

Abstract
Bis (β-diketonato)palladium(II) reacts with excess amines(L) to afford [Pd(β-dik)L2] (β-dik) or [PdL4] (β-dik)2 depending upon whether L is a secondary or a primary amine, respectively. These reactions are reversible and the relative stability in solution of the complexes containing the β-diketonate anion in the outer sphere is in the order: acac &lt; tfac &lt; hfac.
CHARGE TRANSFER INTERACTION IN SOME TROPYLIOCYCLOPHANE TETRAFLUOROBORATES
Authors: Horita Hisanori , Otsubo Tetsuo , Misumi Soichi 
Published: July 2006

Abstract
Three isomeric [2.2]tropyliocyclophanes were synthesized. The similarity of their structures to those of [2.2]metapara- and meta-cyclophanes and a relationship between the structures and the intramolecular CT interaction are discussed on the basis of the NMR and electronic spectra, respectively.
α-HALO-β-DICARBONYL COMPOUNDS. NOVEL CARBOXYL PROTECTING REAGENTS. THE APPLICATION TO THE SYNTHESIS OF CEPHALEXIN FROM PENICILLIN
Authors: Ikeda Hitoshi , Nitta Hajime , Hatamura Mariko , Hatanaka Minoru , Ishimaru Toshiyasu 
Published: July 2006

Abstract
α-Halo-β-dicarbonyl compounds are successfully used as the carboxyl protective reagents in the synthesis of cephalexin from penicillin.
INTERACTION OF ANTHRAQUINOID ACID DYES WITH NONIONIC SURFACTANTS
Authors: Tuong Tran Dinh , Hayano Shigeo 
Published: July 2006

Abstract
The interaction of an anthraquinoid acid dye with a nonionic surfactant of the nonylphenol ethylene oxide type has been investigated by spectroscopic measurements and gel permeation chromatography. The results are interpreted by assuming that the dye is adsorbed on the surfactant micelles and the Freundlich isotherm has been found to correlate well the data.
PREPARATION OF THE THERMODYNAMICALLY LESS STABLE ALTROPYRANOSIDE FROM A NITRO-SUGAR WITH ACETYLACETONE
Authors: Sakakibara Tohru , Seta Akinori , Tachimori Yoshifusa , Takamoto Tetsuyoshi , Sudoh Rokuro 
Published: July 2006

Abstract
The Michael reaction of the 3-nitro-2-enopyranoside 1 with ethyl malonate in THF or with acetone in the presence of small amounts of NaOH gave the mannopyranoside 2 or 3, respectively, whereas the similar reaction with acetylacetone afforded a mixture of the mannopyranoside 4 and the altropyranoside 5.