bluuebunny/crossref_metadata_2025 huggingface dataset:
CRYSTALLIZATION OF AN AMORPHOUS OXIDE IN La–Nb–O SYSTEM
Authors: Yajima Seishi , Okamura Kiyohito , Shishido Toetsu
Published: July 2006

An amorphous oxide of which composition corresponds to La2O3·5Nb2O5was prepared by making use of an impact quenching technique. The phase transformation from an amorphous to an equilibrium crystalline state was studied by means of differential thermal analysis (DTA) and X-ray diffraction. From the experimental results, the crystallization process was characterized mainly by the two successive transitions, i.e., glassy phase → a new metastable phase → stable phase of La2O3·5Nb2O5.
A NEW METHOD FOR MEASURING Sn←S1 ABSORPTION SPECTRA
Authors: Kobayashi Takayoshi , Matsumoto Satoru , Nagakura Saburo
Published: July 2006

A new method for measuring absorption spectra of transient species in the nanosecond time scale was developed. It is applicable to highly fluorescent systems and gives accurate results in spite of its rather simple optical alignment. The method was applied to the 1,2,4,5-tetracyanobenzene-methyl-substituted benzene and 1,4-dicyanobenzenepyrene systems.
X-RAY PHOTOELECTRON SPECTROSCOPY STUDIES OF La2O3-Cr2O3 CATALYSTS
Authors: Okamoto Yasuaki , Adachi Kiyoshi , Imanaka Toshinobu , Teranishi Shiichiro
Published: July 2006

X-ray photoelectron spectra of La2O3-Cr2O3 catalysts with different compositions were measured. On the basis of the binding energies of Cr2P3⁄2 subshell, it is concluded that there exist the hexa- and tri-valent chromiums in these catalysts, and that when the content of chromia becomes larger, the content of the trivalent chromium becomes predominant.
PREPARATION AND REACTION OF N-BENZIMIDOYLSULFILIMINES
Authors: Fuchigami Toshio , Odo Keijiro
Published: July 2006

N-Chlorobenzamidine [I] reacted readily with dimethyl sulfide in acetonitrile to form N-benzimidoylaminodimethylsulfonium chloride [II]. Treatment of [II] with sodium hydroxide gave N-benzimidoyl-S,S-dimethylsulfilimine [III] quantitatively. The thermolysis of acyl derivatives of [III] gave rise to 1,2,4-oxadiazoles.
AN APROACH TO BIOGENESIS OF DEHYDROALTENUSIN BY ENZYMIC OXIDATION
Authors: Kameda Kiyoshi , Namiki Mitsuo
Published: July 2006

Dehydroaltenusin, a metabolite of Alternaria kikuchiana, was coverted from altenusin with homogenated potato and sweet potato extracts.
HOMOALLYLIC REARRANGEMENTS OF 4-SPIRO[2.4]HEPTYL RADICAL AND 4-SPIRO[2.5]OCTYL RADICAL
Authors: Suzuki Mikio , Murahashi Shun-Ichi , Sonoda Akio , Moritani Ichiro
Published: July 2006

Irradiation of azobis(4-spiro[2.4]heptane) and azobis(4-spiro[2.5]octane) afforded homoallylically rearranged products via the corresponding titled radicals, in which the rigid geometry locks the cyclopropylcarbinyl radical in the stable bisected conformation.
PREPARATION OF POLYMERS WITH SULFILIMINE STRUCTURE
Authors: Kise Hideo , Serita Hajime , Seno Manabu , Asahara Teruzo
Published: July 2006

The reaction of poly(p-vinylbenzylalkyl sulfide) and poly(p-vinylbenzylphenyl sulfide) with chloramine-T afforded polymers with pendant groups of sulfilimine structure. The same polymers were obtained by radical polymerization of N-tosyl-S-alkyl- and N-tosyl-S-phenyl-S-p-vinylbenzylsulfilimines.
PHOTOCHEMISTRY OF 1,2-DIPHENYLCYCLOBUTENE IN PROTIC SOLVENTS
Authors: Sakuragi Masako , Hasegawa Masaki
Published: July 2006

Irradiation of 1,2-diphenylcyclobutene (1) in methanol solution afforded a mixture of α-(1-phenylcyclopropyl)benzyl methyl ether and 1,2-diphenylcyclobutyl methyl ether. In acetic acid corresponding esters were obtained. Evidence supporting the involvement of a singlet species was obtained by the finding that the fluorescence of 1 is substantially quenched on addition of methanol to the solution of 1 in n-hexane.
CATALYTIC ASYMMETRIC HYDROGENATION OF BENZIL WITH BIS(DIMETHYLGLYOXIMATO)COBALT(II)-CHIRAL AMINE COMPLEX. EFFECTS OF STRUCTURAL VARIATION OF CHIRAL AMINE AND REACTION TEMPERATURE
Authors: Ohgo Yoshiaki , Takeuchi Seiji , Natori Yukikazu , Yoshimura Juji
Published: July 2006

It was found in the titled reaction that (1) the configuration of the predominant isomer is unequivocally determined by those of the vicinal carbons attaching amino and hydroxyl groups, (2) the hydroxyl group of chiral aminoalcohols plays an extremely important role in this asymmetry-transfer, and (3) the optical yield increases with lowering the reaction temperature (O.Y.: 71% at 10°C).
A CONVENIENT METHOD FOR THE PREPARATION OF VINYL SULFIDES AND OLEFINS BY THE USE OF TiCl4 AND Zn
Authors: Mukaiyama Teruaki , Shiono Manzo , Sato Toshio
Published: July 2006

β-Hydroxythioacetals or β-hydroxysulfides, prepared by the reactions of α-lithio thioacetals or α-lithio sulfides with aldehydes or ketones, were converted into vinyl sulfides or olefins in good yields by the treatment with TiCl4 and Zn.
SYNTHESIS AND SOME PROPERTIES OF A LAYER-TYPE INORGANIC–ORGANIC COMPLEX OF FeOCl AND PYRIDINE
Authors: Kanamaru Fumikazu , Yamanaka Shoji , Koizumi Mitsue , Nagai Siro
Published: July 2006

New intercalated compounds of FeOCl and pyridine were synthesized by soaking FeOCl in pyridine vapor at a temperature range from 30° to 120°C. Number of pyridine molecules per FeOCl in the product was, within the experimental error, a rational number, 1/n where n=3 and 4 depending on the temperature of preparation. The complexes have an orthorhombic unit-cell with a=3.78(1), b=13.45(3), c=3.30(l) Å. Mössbauer effect study on FeOCl (pyridine)1⁄3 at room temperature showed that the isomershift relative to Fe metal and the quadrupole splitting were 0.36(1)mm/sec and 0.92(1)mm/sec respectively. The E.S.R. spectrum of FeOCl (pyridine)1⁄3 represented a broad singlet absorption line at g=2.003 with Hmsl=200 gauss, suggesting the existence of conduction electrons resulted from partial transfer of the lone pair electrons of the nitrogen atom into FeOCl layer.
ISOTOPIC EXCHANGE REACTION OF ETHYLBENZENE WITH DEUTERIUM OXIDE
Authors: Niwa Miki , Murakami Yuichi
Published: July 2006

It is shown by means of the isotopic exchange reaction that the reaction intermediate in the oxidative dehydrogenation of ethylbenzene is not desorbed from the catalyst surface.
THE EXCITED-STATE REACTIONS OF TRIPTYCENES. II. THE CARBENE MECHANISM FOR PHOTOISOMERIZATION OF TRIPTYCENE
Authors: Iwamura Hiizu
Published: July 2006

Irradiation of triptycene (1) in methanol gives 9-(2-methoxymethylphenyl)-fluorene (4) in good yield. The reaction is considered to proceed through formation of o-(9-fluorenyl)-phenylcarbene (9) followed by attack with the solvent. When the carbene 9 is generated independently by the photolysis of the diazo compound 8 in cyclohexane, the normal photoisomer 2 of 1 is obtained.
PREPARATION AND OPTICAL RESOLUTION OF TRIS(TETRAMETHYLENEDIAMINE) COBALT(III) COMPLEX
Authors: Fujita Junnosuke , Ogino Hiroshi
Published: July 2006

A new red complex of the luteo type [Co(tmd)3]Br3, where tmd denotes tetramethylenediamine, has been prepared from Co(II) nitrate and tmd in dimethylsulfoxide(DMSO) by air oxidation. The complex has been resolved into optical isomers. The (−)D-isomer shows a weak positive and a strong negative circular dichroism band in the first absorption band region.
THE EFFECT OF THE SPIN MULTIPLICITY OF SENSITIZERS ON THE FORMATION OF FREE RADICAL CAGE REACTION PRODUCT IN THE IRRADIATION OF DIBENZOYL PEROXIDE
Authors: Tokumaru Katsumi , Ohshima Akinobu , Nakata Toshio , Sakuragi Hirochika , Mishima Tamako
Published: July 2006

Decomposition of dibenzoyl peroxide with singlet sensitization gives phenyl benzoate resulting from the cage recombination between a benzoxyl and a phenyl radical as noticeably as with the direct photolysis; on the contrary, the triplet sensitization gives only low yield of phenyl benzoate.
ASYMMETRIC HYDROGENATION OF α-OXOCARBONYL COMPOUNDS CATALYZED BY BIS(DIMETHYLGLYOXIMATO)COBALT(II)-CHIRAL AMINE COMPLEX
Authors: Ohgo Yoshiaki , Natori Yukikazu , Takeuchi Seiji , Yoshimura Juji
Published: July 2006

Bis(dimethylglyoximato)cobalt(II)-quinine-catalyzed asymmetric hydrogenation of α-diketones afforded optically active reduction products, while that of α-oxocarboxylates and diacetyl gave not only simple reduction products but also reductive dimerization products with optical activity. In general, the optical yields of simple reduction products in cases of α-diketones (56–73%) were higher than those in cases of α-oxocarboxylates (12–20%).
PHOTOELECTRON SPECTRA OF TETRACYANOETHYLENE(TCNE) AND TETRACYANOQUINODIMETHANE(TCNQ)
Authors: Ikemoto Isao , Samizo Kuniko , Fujikawa Takashi , Ishii Kikujiro , Ohta Toshiaki , Kuroda Haruo
Published: July 2006

The photoelectron spectra of TCNE and TCNQ in the gaseous state were measured by stimulating with He I resonance line. The first ionization potential is determined to be 11.77 eV for TCNE and 9.61 eV for TCNQ. The interpretations of the observed photoelectron spectra are carried out with the aids of the photoelectron spectroscopic data of the related compounds and the results of CNDO/2 calculation.
A LIQUID-PHASE ONE-STAGE PROCESS FOR KETAZINE SYNTHESIS DIRECTLY FROM BENZOPHENONE, AMMONIA AND OXYGEN IN THE PRESENCE OF ZnCl2 AND CuCl
Authors: Hayashi Hiromu , Kawasaki Kengo , Murata Tsutomu
Published: July 2006

A new procedure for the synthesis of benzophenone azine is described. An equi-molar mixture of NH3 and O2 was passed through benzophenone in the presence of ZnCl2 and CuCl at 200°C to obtain benzophenone azine in good yield.
ANODIC VOLTAMMETRY AND ESR STUDIES OF P-PHENYLENEDIAMINE AND SOME OF ITS DERIVATIVES IN ACETONITRILE
Authors: Yao Toshio , Musha Soichiro , Munemori Makoto
Published: July 2006

The electrochemical oxidation of p-phenylenediamine and its derivatives was studied on platinum electrode in acetonitrile. The oxidation mechanism was composed of two successive one-electron reversible waves. The hyperfine ESR spectra of the cation radicals were observed by electrolysis on the first wave. The generation of the same cation radicals could be performed by electrolysis on the second wave, indicating the presence of an electron exchange reaction between the dication and the parent molecule in solution.
NEW ROUTES TO 1,2-DIAZOLES WITH A FUSED RING SYSTEM BY REDUCTIVE AND OXIDATIVE CYCLIZATIONS
Authors: Lee Joung Hee , Matsumoto Akira , Yoshida Masayuki , Simamura Osamu
Published: July 2006

Heating aromatic or heteroaromatic compounds carrying a carbonyl and an arylazo group at adjacent nuclear positions with triethyl phosphite resulted in the formation of a 1,2-diazole ring through reductive cyclizations. Similar, but oxidative, cyclizations were effected by the action of selenium dioxide on compounds with a methylene group at an appropriate position.
THE SYNTHESIS AND SOME PROPERTIES OF 3H-CYCLOHEPT[a]AZULEN-3-ONE
Authors: Saito Motoyasu , Morita Tadayoshi , Takase Kahei
Published: July 2006

3H-Cyclohept[a]azulen-3-one (azuleno[1,2-d]tropone) (1) was synthesized, starting from 2-styrylazulene (2). In trifluoroacetic or dil. sulfuric acid, 1 exists in hydroxycyclohept[a]azulenylium ion (A1), while it exists in a dication (C) in cone. sulfuric acid.
SOLVENT EFFECT ON THE ORIENTATION OF BENZOPHENONE GROUPS IN THE SIDE CHAIN OF POLY-γ-p-BENZOYLBENZYL-l-GLUTAMATE
Authors: Ueno Akihiko , Toda Fujio , Iwakura Yoshio
Published: July 2006

The orientation of benzophenone groups in the side chain of poly-γ-p-benzoylbenzyl-l-glutamate (PBBLG) has been studied together with its conformation by infrared, circular dichroism and ultraviolet spectra. The results suggest that the benzophenone groups in the side chain of α-helical PBBLG are more rigidly orientated in hexafluoroisopropanol (HFIP) than in dichloroethane (DCE).
HIGHLY ACTIVE POLYMER-SUPPORTED Pd COMPLEX. A NEW SYNTHETIC METHOD AND ITS USE IN SELECTIVE HYDROGENATION OF OLEFINS AND ACETYLENES
Authors: Kaneda Kiyotomi , Terasawa Masami , Imanaka Toshinobu , Teranishi Shiichiro
Published: July 2006

The palladium chloride complex supported on polymeric diphenylbenzyl phosphine is very active for both hydrogenation of olefins and acetylenes, and isomerization of double bonds. This high activity is probably due to the formation of the coordinatively unsaturated palladium.
A NOBLE SYNTHESIS OF 1-ALKYL-2-NAPHTHOLS
Authors: Kito Taketoshi , Ota Koki
Published: July 2006

It was found that the treatment of alkali 2-naphthoxide with alcohols easily afforded 1-alkyl-2-naphthols in good yields. The structures were determined by means of MS, NMR, and IR.
ASYMMETRIC HYDROFORMYLATION BY RHODIUM COMPLEX CATALYST IN THE PRESENCE OF (−)-2,3-O-ISOPROPYLIDENE-2,3-DIHYDROXY-1,4-BIS(5H-DIBENZOPHOSPHOLYL)BUTANE
Authors: Tanaka Masato , Ikeda Yoshikazu , Ogata Ikuei
Published: July 2006

The highest stereoselectivity ever observed (16.9∼44.3% optical yield) was realized in the hydroformylation of styrene and butenes using a rhodium complex catalyst in the presence of (−)-2,3-O-isopropylidene-2,3-dihydroxy-1,4-bis (5H-dibenzophospholyl)butane.
ISOTHERMAL REDUCTION OF V2O5 BY SO2 GAS
Authors: Kawashima Kenji , Kosuge Koji , Kachi Sukeji
Published: July 2006

When V2O5 is reduced isothermally by SO2 gas (200 cc/min), the weight loss shows the stepwise curve. Each step corresponds to the intermediate phase expressed by general formula VNO2N+1 (N=3,4,5, … and ∞). The quenched specimens at each step analyzed by an X-ray diffraction, however, have revealed to be coexistence of two phases, except for the case of N=4,6 and ∞ (V2O4).
EREMOPHILANES PART I. TOTAL SYNTHESES OF (±)-EREMOPHILENOLIDE AND (±)-FURANOEREMOPHILANE
Authors: Nagakura Isao , Maeda Shuichi , Ueno Masako , Funamizu Makoto , Kitahara Yoshio
Published: July 2006

Stereoselective total syntheses of (±)-eremophilenolide (14) and (±)-furanoeremophilane (15) starting from an octalone (1) are described.
SELECTIVE NUCLEAR LITHIATION OF AROMATIC COMPOUNDS: FACILE SYNTHESIS OF METHOXYPHTHALIDE DERIVATIVES BY CARBOXYLATION OF THE LITHIO-COMPOUNDS
Authors: Uemura Motokazu , Tokuyama Satoru , Sakan Takeo
Published: July 2006

The aromatic compounds, which have both hydroxymethyl and methoxyl groups at 1,3-position, were lithiated mostly at 2-position with n-butyllithium. This reaction would provide a useful synthetic method of methoxyphthalide derivatives, in conjunction with carboxylation of the resulting lithio-compounds.
REDUCTION BY A MODEL OF NAD(P)H. PHOTO-ACTIVATION OF NADH AND ITS MODEL COMPOUNDS TOWARD THE REDUCTION OF OLEFINS
Authors: Ohnishi Yutaka , Kagami Masayuki , Ohno Atsuyoshi
Published: July 2006

NADH, 1-benzyl-1,4-dihydronicotinamide, and Hantzsch ester reduce dimethyl maleate and fumarate to dimethyl succinate under photo-activation at room temperature. Fumaric acid is also reduced under the same condition. Pyridine is the best solvent for the reaction.
NICKEL–PHOSPHINE COMPLEX CATALYZED GRIGNARD SYNTHESIS OF STERICALLY HINDERED, UNSYMMETRICAL BIARYLS: AN APPROACH TO THE ASYMMETRIC SYNTHESIS OF BIARYL ATROPISOMERS
Authors: Tamao Kohei , Minato Akio , Miyake Norio , Matsuda Tatsuhito , Kiso Yoshihisa , Kumada Makoto
Published: July 2006

Sterically hindered, unsymmetrical biaryls can be prepared by the cross-coupling reaction of ortho-substituted aryl Grignard reagents with aryl halides in the presence of nickel–phosphine complexes as catalysts. Asymmetric synthesis of biaryl atropisomers has been accomplished with a chiral phosphine-nickel catalyst.
SYNTHESES OF AMINO ACIDS FROM ALIPHATIC AMINES BY CONTACT GLOW DISCHARGE ELECTROLYSIS
Authors: Harada Kaoru , Iwasaki Tameo
Published: July 2006

Amino acids are synthesized from aliphatic amines by direct carboxylation using formic acid under conditions of contact glow discharge electrolysis.
SOLUTION CIRCULAR DICHROISM SPECTRA OF THE COMPLEX ION, (−)546-Δ(lel3)-[Co(R,R-ptn)3]3+
Authors: Kuroda Reiko , Fujita Junnoske , Saito Yoshihiko
Published: July 2006

The solution CD spectra of (−)546-Δ(lel3)-[Co(R,R-ptn)3]3+ ion were found to be seriously affected by its counter ions. The CD change may be due to ion association between the complex and the counter ions.
FACILE SYNTHESIS OF ARYL CYANIDES FROM IODIDES CATALYZED BY PALLADIUM TRIPHENYLPHOSPHINE COMPLEX
Authors: Sekiya Akira , Ishikawa Nobuo
Published: July 2006

Cyanogenation of iodobenzene with potassium cyanide has been found to proceed smoothly in tetrahydrofuran in the presence of a catalytic amount of tetrakis(triphenylphosphine)palladium(O). The reaction involves an intermediate, iodo(phenyl)bis(triphenylphosphine)palladium(II), which acts as a retracing species in the catalytic reaction path.
BREAKDOWN CURVES OF ETHYL AND METHYL RADICALS AND THEIR MASS SPECTRA
Authors: Ikuta Shigeru , Yoshihara Kenji , Shiokawa Takanobu
Published: July 2006

The breakdown curves of ethyl and methyl radicals were estimated based on those of corresponding alkyliodides. Mass spectra of the radicals calculated from these breakdown curves using an estimated internal energy distribution are in good accordance with those obtained by electron impact.
A CONVENIENT METHOD FOR THE PREPARATION OF δ-ALKOXY-α,β-UNSATURATED ALDEHYDES BY REACTION OF ACETALS WITH 1-TRIMETHYLSILOXY-1,3-BUTADIENE
Authors: Mukaiyama Teruaki , Ishida Akihiko
Published: July 2006

ZIt was found that, in the presence of TiCl4,1-trimethylsiloxy-1,3-butadiene (II) reacts with acetals(I) to give δ-alkoxy-δ,β-unsaturated aldehydes in good yields. This reaction provides a novel method for the introduction of–CH2–CH=CH-CHO unit to an electrophile as acetal activated by TiCl4.
SILICON-29 HYPERFINE SPLITTING OF THE SiH3 RADICAL
Authors: Katsu Takashi , Yatsurugi Yoshifumi , Sato Mitsuo , Fujita Yuzaburo
Published: July 2006

The well defined ESR spectra of the naturally abundant 29SiH3 and 29SiD3 radicals produced by γ-irradiation of silanes adsorbed on the surface of silica gel are reported. The observed 29Si-hf splitting of 182 G is compared with those obtained previously in the inert-gas matrices.
RAMAN SPECTRA OF THE MOLTEN MnCl2–KCl SYSTEM
Authors: Tanemoto Kei , Nakamura Tetsuro
Published: July 2006

The distribution of symmetric Mn–Cl stretching frequencies in molten MnCl2–KCl system was studied by laser-Raman spectroscopy. The stretching frequency was 208 cm−1 in pure MnCl2 and 245 ∼ 251 cm−1 in KCl-rich compositions. The full width at half-height of Raman band increased with increasing MnCl2 concentration from 38 cm−1 (MnCl2 : KCl = 1 : 4) to 110 cm−1 (pure MnCl2).
THREE NEW OBTUSILACTONES FROM LINDERA OBTUSILOBA BLUME
Authors: Niwa Masatake , Iguchi Masanobu , Yamamura Shosuke
Published: July 2006

In addition to obtusilactone (I), three new lactones (II, III and IV) have been isolated from the plant Lindera obtusiloba Blume, and their structures also been established in connection with I.
A NEW CATALYST FOR CATHODIC REDUCTION OF OXYGEN: LANTHANUM NICKEL OXIDE
Authors: Matumoto Yasumiti , Yoneyama Hirosi , Tamura Hideo
Published: July 2006

The cathodic polarization characteristics of lanthanum nickel oxide, LaNiO3, were investigated in O2-saturated alkaline solutions and it was found that this oxide has a high catalytic activity for oxygen reduction. This paper represents the results in brief.
PRODUCTS OF THE REACTION OF AQUAPENTAAMMINECOBALT(III) IONS WITH ETHYLENEDIAMINE IN DIMETHYLSULFOXIDE
Authors: Ogino Hiroshi , Tanaka Nobuyuki
Published: July 2006

From the products of the reaction of [Co(H2O)(NH3)5](ClO4)3 with ethylenediamine (en) in dimethylsulfoxide, [Co(NH3)5(enH)]Br4 and [Co(NH3)6−2n(en)n]X3 (n = 0, 1, 2, and 3) were isolated. Treatment of [Co(NH3)5(enH)Br4 with aqueous ammonia gave a novel complex, [Co(NH3)5(en)]Br3 containing en as a monodentate ligand.
OXIDATIVE ADDITION OF ORGANIC ACIDS TO DIOXYGEN COMPLEXES AND FORMATION OF HYDROGEN PEROXIDE
Authors: Muto Shigeaki , Ogata Hajime , Kamiya Yoshio
Published: July 2006

Oxidative addition reactions of organic acids to dioxygen complexes are investigated. In the case of Pt(PPh3)2O2, hydrogen peroxide is obtained in as much as 70% yield with a platinum carboxylato complex, Pt( PPh3)2(OCOCH2Cl)2. The effect of pKa of the substrates on the oxidative addition of the dioxygen complexes is also examined.
PHOTO-ELECTROCHEMICAL BEHAVIORS OF SEMICONDUCTOR ELECTRODES COATED WITH THIN METAL FILMS
Authors: Nakato Yoshihiro , Ohnishi Toshihiro , Tsubomura Hiroshi
Published: July 2006

Contrary to most ordinary semiconductor electrodes, metal-coated semiconductor electrodes have been found to cause photocurrents in aqueous solutions without dissolution into or reaction with the solution, and will be useful as solar-energy convertors.
THE PALLADIUM COMPLEX-CATALYZED REACTIONS OF HEXAORGANODISILANES WITH DIENES
Authors: Sakurai Hideki , Kamiyama Yoshiyasu , Nakadaira Yasuhiro
Published: July 2006

Organodisilanes undergo a novel 1:2 cycloaddition reaction with butadiene or isoprene in the presence of a palladium complex. For example, the reaction of 1,1,2,2-tetramethy1-1,2-disilacyclopentane with isoprene gave 1,1,5,5,8,11-hexamethyl-l,5-disilacyclotrideca-7,11-diene in 76% yield.
A NEW METHOD FOR THE PREPARATION OF β-HYDROXYESTERS. THE TITANIUM TETRACHLORIDE-PROMOTED REACTION OF KETENE ALKYL TRIALKYLSILYL ACETALS WITH CARBONYL COMPOUNDS
Authors: Saigo Kazuhiko , Osaki Masaaki , Mukaiyama Teruaki
Published: July 2006

In the presence of TiCl4, ketene alkyl trialkylsilyl acetals, prepared from α-lithio esters and a trialkylsilyl halide, react with aldehydes and ketones at −78°C to afford the corresponding β-hydroxyesters and β-trialkylsiloxyesters in good yields.
MOMILACTONE-C, A MINOR CONSTITUENT OF GROWTH INHIBITORS IN RICE HUSK
Authors: Tsunakawa Mitsuaki , Ohba Akihiro , Sasaki Nobuki , Kabuto Chizuko , Kato Tadahiro , Kitahara Yoshio , Takahashi Norindo
Published: July 2006

Structure of momilactone-C (M-C), a minor constituent of growth inhibitors in rice husk, was determined by X-ray analysis, which revealed that C9–C10 of M-C was unusual cis configuration having a boat conformation of A ring. The stereochemistry of C9 of previously reported momilactone-A and B (I and II) has been erroneously written and should now be revised to β -configuration with respect to hydrogen atom as in M-C.
SYNTHESIS OF TAXOQUINONE, 7α-ACETOXYROYLEANONE, DEHYDROROYLEANONE, HORMINONE, 7-OXOROYLEANONE, AND INUROYLEANOL
Authors: Matsumoto Takashi , Harada Shogo
Published: July 2006

Oxidation of ferruginol (II) with benzoyl peroxide gave 12-benzoyloxy-11-hydroxyabieta-8,11,13-triene (X) which was converted into taxoquinone (IV), 7α-acetoxyroyleanone (V), dehydroroyleanone (VI), horminone (VII), 7-oxoroyleanone (VIII), and inuroyleanol (IX).
HYDROGENATION OF ETHYLENE OVER LaNi5H3.3
Authors: Soga Kazuo , Imamura Hayao , Ikeda Sakuji
Published: July 2006

The hydrogenation of ethylene was conducted at −78°C over LaNi5H3.3 both in the presence and absence of gaseous hydrogen, and it was found that hydrogen absorbed in LaNi5H3.3 showed far greater activity as compared with gaseous hydrogen under the experiment conditions.
SELECTIVE ADSORPTION OF METAL IONS ON CROSSLINKED POLY(VINYLPYRIDINE) RESIN PREPARED WITH A METAL ION AS A TEMPLATE
Authors: Nishide Hiroyuki , Deguchi Jichio , Tsuchida Eishun
Published: July 2006

A new chelate resin was prepared by crosslinking poly(4-vinylpyridine) with a metal ion (Cu2+, Fe3+, Co2+, Zn2+, Ni2+, and Hg2+) as a template. The resin comparatively adsorbed the metal ion which was used as a template. The stability constants of the copper complexes with the resins were measured.
THE SYNTHESES OF POTASSIUM SELENOCARBOXYLATES AND THEIR DERIVATIVES
Authors: Ishihara Hideharu , Hirabayashi Yoshio
Published: July 2006

Potassium selenocarboxylates were prepared in good yields on the reaction of diacyl selenides with methanolic potassium hydroxide. They were fairly stable under nitrogen and useful as starting material for the preparation of selenocarboxylic acid derivatives; methyl selenobenzoate, α-(selenobenzoyl)acetophenone, phenyl p-chlorobenzoyl diselenide, O-trimethylsilyl selenobenzoate, bis(selenostearoyl)methane, and dibenzoyl diselenide.
PHOTOCHEMISTRY OF TRIBENZYLBORANE AND ITS AMMONIA COMPLEX —HETEROLYTIC CLEAVAGE OF BENZYL CARBON–BORON BOND
Authors: Chung Vo Van , Inagaki Kazuhiko , Tokuda Masao , Itoh Mitsuomi
Published: July 2006

Irradiation of tribenzylborane–ammonia complex in protic solvent produced toluene in a 262% yield. Irradiation of tribenzylborane also produced toluene as a major product. Formation of toluene was elucidated by a protonation of benzyl anion which resulted from heterolytic cleavage of the benzyl carbon–boron bond.
BEHAVIORS OF THE TRIPLET MOLECULE IN NEAT LIQUID OF NAPHTHALENE DERIVATIVES AT ROOM TEMPERATURE
Authors: Ohno Takeshi , Kato Shunji
Published: July 2006

Triplet excited species in neat liquids of 1-methylnaphthalene and 1-chloronaphthalene were investigated by means of flash photolysis. The triplet excited dimers are assumed on the bases of analysis of T-T absorption spectra. A rapid T-T energy transfer from 1-chloronaphthalene to trans-stilbene indicates a triplet excitation migration.
REGIOSELECTIVE CLEAVAGE OF ARYL DECYL ETHERS WITH ALKALI METALS
Authors: Itoh Mitsuomi , Yoshida Shigeo , Ando Toshiharu , Miyaura Norio
Published: July 2006

Alkali metal cleavage of several types of aryl decyl ethers was conducted in HMPA and THF. Smaller alkali metals in HMPA tend to cleave the bond between the decyl group and oxygen. Potassium in THF cleaves the bond between the aryl group and oxygen in good yields.
SYNTHESIS OF THE COPPER(II) COMPLEX OF BIS(SALICYLIDENEAMINO)MALEONITRILE: [(2,3-DICYANO-CIS-2-BUTENE-2,3-DIIMINOMETHYL)DI-O-PHENOLATO]COPPER(II)
Authors: Iwamoto Toschitake , Suzuki Hiroko
Published: July 2006

The copper(II) complex of the Schiff base derived from a diamino-maleonitrile and two salicylaldehyde molecules was synthesized as deep wine-red crystals. The complex molecule was supported to have a planar structure by the magnetic susceptibility and the infrared and Raman spectra.
INTRAMOLECULAR EXIPLEX FORMATION IN CZ-(CH2)n(

Remark: Graphics omitted.

)
Authors: Yamamoto Masahide , Hatano Yoshihiko , Nishijima Yasunori
Published: July 2006

Compounds:(Remark: Graphics omitted.) which show intramolecular exciplex emission have been synthesized, where CZ is the carbazole group and n = 1, 2,3,4, and 5. The absorption spectra and emission spectra of these compounds were studied; both normal fluorescence and intramolecular exciplex emission were strongly affected by methylene chain length. Very rapid exciplex formation (less than a few nsec) is indicated by the measurement of emission lifetime.
ANOMALY IN THE HEAT CAPACITY OF CRYSTALLINE CARBON MONOXIDE AT 18 K ASSOCIATED WITH ORIENTATIONAL ORDERING
Authors: Atake Tooru , Suga Hiroshi , Chihara Hideaki
Published: July 2006

A small anomaly in heat capacity appeared at about 18 K when α-carbon monoxide was annealed at 15–16 K for 20–40 hours. A relaxation phenomenon was observed between 14 and 19 K. The results were tentatively interpreted as due to a glass transition arising from freezing of molecular head-to-tail reorientation.
MICROWAVE SPECTRUM OF 2-FURANCARBONITRILE
Authors: Kojima Toshio , Ogata Teruhiko , Maeda Shiro
Published: July 2006

The microwave spectrum of 2-furancarbonitrile has been studied in the frequency region from 10 to 20 GHz. The rotational constants (MHz) for the ground vibrational state are determined to be A=9220.0±0.2, B=2029.27±0.01, and C=1662.64±0.01. The dipole moment is determined to be μ=4.71±0.02 D with the components μa=4.62±0.02 D and μb=0.90±0.01 D. These data suggest that the furan ring is probably distorted.
CALORIMETRIC STUDY OF THE PHASE CHANGES IN SOLID ETHANE
Authors: Atake Tooru , Chihara Hideaki
Published: July 2006

The heat capacity of solid and liquid ethane was measured between 50 and 100 K. The transition occurs at 89.813 K with the heat of transition 2282 Jmol−1. The triple point is 90.341 K and the heat of fusion is 583 Jmol−1. The entropy of fusion is as small as 6.46 JK−1 mol−1, indicating that the high temperature phase is a plastic crystal. The volume changes associated with the transition and fusion were derived as 1.05 cm3mol−1 and 4.1 cm3mol−1, respectively. Molecular motion in the plastic phase is discussed.
REVERSIBLE ELECTRODE REACTION OF CYTOCHROME C
Authors: Yeh Peter , Kuwana Theodore
Published: July 2006

The heme protein, cytochrome c, was found to exhibit reversible electron transfer characteristics at an indium oxide electrode. The electrode reaction at this electrode was evaluated using cyclic voltammetry and differential pulse method.
SYNTHESIS OF DIMETHYL FORMAMIDE FROM CARBON DIOXIDE, HYDROGEN AND DIMETHYL AMINE CATALYZED BY PALLADIUM(II) CHLORIDE
Authors: Kudo Kiyoshi , Phala Heng , Sugita Nobuyuki , Takezaki Yoshimasa
Published: July 2006

Dimethyl formamide was catalytically synthesized from dimethyl amine, carbon dioxide and hydrogen in the presence of palladium(II) chloride and bases in the methyl cellosolve.
REACTION OF DIAZONIUM SALTS WITH TRANSITION METALS. I. ARYLATION OF OLEFINS WITH ARENEDIAZONIUM SALTS CATALYZED BY ZERO VALENT PALLADIUM
Authors: Kikukawa Kiyoshi , Matsuda Tsutomu
Published: July 2006

Various olefins, especially those bearing electron donating groups, were successfully arylated by arenediazonium salts in the presence of a catalytic amount of palladium(O) complexes. An arylpalladium species was supposed to be an intermediate in this reaction.
A NOVEL TYPE OF POLYCONDENSATION OF POLYHALOGENATED ORGANIC AROMATIC COMPOUNDS PRODUCING THERMOSTABLE POLYPHENYLENE TYPE POLYMERS PROMOTED BY NICKEL COMPLEXES
Authors: Yamamoto Takakazu , Yamamoto Akio
Published: July 2006

Nickel complexes (NiCl2 (2,2′-bipyridine) and NiBr2(triphenylphosphine)2) catalyze polycondensation of di- and polyhalogenated aromatic compounds including p-dibromobenzene, p-dichlorobenzene, m-dichlorobenzene, bis (4-bromophenyl)ether, p-chlorobenzyl chloride and 1,3,5-trichlorobenzene by dehalogenation with magnesium to give polyphenylene type polymers in high yields.
THE SYNTHESIS OF DLETHYL 2,6-DIOXOAZULENE-1,3-DICARBOXYLATE, A DERIVATIVE OF 2,6-AZULENEDIONE (2,6-AZULENOQUINONE)
Authors: Morita Tadayoshi , Takase Kahei
Published: July 2006

Diethyl 2,6-dioxoazulene-1,3-dicarboxylate (1b), a derivative of 2,6-azulenedione (2,6-azulenoquinone), was synthesized by dehydrogenation of diethyl 2,6-dihydroxyazulene-1,3-dicarboxylate (5), which was prepared from 2-diazo-6(2H)-azulenone (4), and was shown to be so reactive that it was isolated only in a form of the dimer (7).
CYCLIZATION OF POLYENES XXIII. SYNTHESIS AND STEREOCHEMISTRY OF ISOINCENSOLE-OXIDE
Authors: Kato Tadahiro , Yen Chin Chung , Uyehara Tadao , Kitahara Yoshio
Published: July 2006

In order to establish the stereochemistry of incensole(I) and isoincensole-oxide (II), which had remained unsolved, I and II were synthesized starting from dl-mukulol(III) and its epimer(IV). The detailed studies of physical and chemical evidences enabled us to determine the stereostructure of these highly oxygenated cembrenoids.
TRANSLATIONAL ENERGIES OF THE EXCITED HYDROGEN AND DEUTERIUM ATOMS PRODUCED BY CONTROLLED ELECTRON IMPACT (300 eV) ON WATER AND HEAVY WATER
Authors: Higo Morihide , Ogawa Teiichiro , Ishibashi Nobuhiko
Published: July 2006

The emission spectra of four Balmer lines (α,β,γ,δ) by electron impact on H2O and D2O were measured. The translational energies (E) of the excited H and D atoms were determined by their Doppler widths. (Remark: Graphics omitted.)
THE SYNTHESIS AND SOME PROPERTIES OF 2,6-DIHYDROXYAZULENE
Authors: Morita Tadayoshi , Kanzava Hiroaki , Takase Kahei
Published: July 2006

2,6-Dihydroxyazulene (3) is synthesized and it is shown that 3 exists in the solvent-dependent keto-enol tautomerism: thus, in acetone or DMSO 3 exists in the enol-type of 2,6-dihydroxyazulene (3a), whereas in chloroform 3 exists in the diketone-type of 1,3-dihydroazulene-2,6-dione [4,5-(2-oxotrimethylene)tropone] (3b).
ATTRACTIVE STERIC EFFECTS OF ALKYL SUBSTITUENTS IN CYCLOHEXANONE HYDROGENATION CATALYZED BY PALLADIUM
Authors: Chihara Teiji , Tanaka Kazunori
Published: July 2006

In the Pd-catalyzed competitive hydrogenation of cyclohexanone (A) and its 4-alkyl derivatives (B), most of the bulkier B’s have unexpectedly reacted faster, and this unusual result is indicative of an “Attractive steric effect”, i.e., attractive interaction of the alkyl substituents with the Pd metal surface.
SYNTHESES OF α- AND β-LAPACHONES AND THEIR HOMOLOGUES BY WAY OF PHOTOCHEMICAL SIDE CHAIN INTRODUCTION TO QUINONE
Authors: Maruyama Kazuhiro , Naruta Yoshinori
Published: July 2006

1,4-Naphthoquinone photochemically reacted with 3-methyl-2-butenal to give 2-(3-methyl-2-butenoyl)-1, 4-naphthalenediol 3b, regiospecifically. The product 3b was successively treated with acid, with dichloroaluminum hydride, and finally with iron(III) chloride to derive in turn to cromanon 4b, dihydropyran 5b, and β-lapachone 6b. β-Lapachone was easily transformed to α-lapachone 7b by treating with acid. Likewise, from other α,β-unsaturated aliphatic aldehydes and 1,4-naphthoquinone α- and β-lapachone analogues were prepared.
UNEXPECTED REACTIONS OF PERFLUORO INNER OLEFINS WITH THIOLS—SUPPOSED 1,4-ELIMINATION OF RS-F—
Authors: Ishikawa Nobuo , Maruta Masamichi
Published: July 2006

Reactions of perfluoro-2- and -4-methyl-2-pentenes with thiols were found to involve an oxidation-reduction system. 1,4-Elimination of sulfenyl fluorides from thio-substituted perfluoroolefins forming 1,3-dienes and disulfides is suggested as the reaction pathway.
THE SINGLE-CRYSTAL AND ION-ASSOCIATION CIRCULAR DICHROISM SPECTRA OF THE BIS(R)-2-METHYL-1,4,7-TRIAZACYCIONONANE]COBALT(III) ION
Authors: Kuroda Reiko , Mason Stephen
Published: July 2006

The CD spectrum of a single crystal of [Co(R-MeTACN)2]I3·5H2O and of an aqueous solution of the complex show, by comparison with the corresponding CD spectra of Λ-(+)-[Co(en)3]Cl3, that, of the two D3 components of the transition to the octahedral 1T1 state of the [Co(III)N6] chromophore in the visible region, the rotational strength R(A2) is enhanced by polar and R(E) by equatorial ligand groups. The correlation is employed to assign structures to anion-associations with [Co(R-MeTACN)2]3+.
SYNTHESIS OF OPTICALLY ACTIVE NATURAL CAULERPOL
Authors: Masaki Yukio , Hashimoto Kinji , Iwai Hironobu , Kaji Kenji
Published: July 2006

Synthesis of caulerpol 1 from (S)-(−)-α-cyclogeraniol (2), determining the absolute configuration of the asymmetric center is reported.
β-DIALKYLAMINO CONJUGATED ENONES: REDUCTION WITH NaBH4–FeCl3 AND CONVERSION INTO CONJUGATED ENONES
Authors: Kashima Choji , Yamamoto Yasuhiro
Published: July 2006

β-Dialkylamino conjugated enones were reduced to the corresponding saturated γ-amino alcohols with sodium borohydride in the presence of iron (III) chloride. The resulting γ-amino alcohols were converted into conjugated enones by chromic acid oxidation and deamination.
REACTIONS OF ARYL HALIDES WITH THIOLATE ANIONS IN THE PRESENCE OF CATALYTIC AMOUNTS OF TETRAKIS(TRIPHENYLPHOSPHINE)PALLADIUM PREPARATION OF ARYL SULFIDES
Authors: Kosugi Masanori , Shimizu Tomiya , Migita Toshihiko
Published: July 2006

Aryl bromide and iodide were found to react with aliphatic and aromatic thiolate anions to give the corresponding sulfides in the presence of Pd(O). The reaction was not inhibited by p-dinitrobenzene which is a good inhibitor for the SRN1.
COEXISTENCE OF MONOMERIC AND DIMERIC COMPLEX MOLECULES IN A CRYSTAL: THE CRYSTAL STRUCTURE OF THE β-FORM OF MERCURY(II) N,N-DIISOPROPYLDITHIOCARBAMATE
Authors: Iwasaki Hitoshi , Ito Masahisa , Kobayashi Kimiko
Published: July 2006

The title compound has been found to crystallize from acetone in two modifications. An X-ray diffraction study has revealed that the structure of the β-form belongs to a quite rare type that it contains both monomeric and dimeric complexes. This situation would reflect the coexistence of molecules with different degree of association in solution.
ELECTROCHEMICAL OXIDATION OF 3,3,7,7-TETRAETHYL-PERHYDRO-1,5-DIAZOCINE
Authors: Fuchigami Toshio , Iwaoka Tomoyasu , Nonaka Tsutomu , Sekine Taro
Published: July 2006

The electrochemical oxidation of 3,3,7,7-tetraethyl-perhydro-1,5-diazocine (I) was investigated at platinum, carbon, nickel, and silver anodes. The former three electrodes gave 3,3,7,7-tetraethyl-1,5-diazabicyclo[3,3,0]octane (II) and 1-(2-ethyl-2-formylbutyl)-4,4-diethyl-4,5-dihydropyrazole (III) in approximately the same yields, while the latter one gave (III) solely.
RHODIUM CATALYZED α-METHYLATION OF KETONES WITH CARBON MONOXIDE-WATER-FORMALDEHYDE SYSTEM
Authors: Watanabe Yoshihisa , Shimizu Yutaro , Takatsuki Kunihiko , Takegami Yoshinobu
Published: July 2006

α-Methylation of ketones is catalyzed by rhodium chloride with aqueous formaldehyde under pressures of carbon monoxide at 180 °C. Cyclohexanone and acetophenone gave mono- and dimethylated ketones in good yields.
THE ELECTRICAL METHOD OF INVESTIGATION OF THE ANTIGEN-ANTIBODY AND ENZYME–ENZYME INHIBITOR REACTIONS USING CHEMICALLY MODIFIED ELECTRODES
Authors: Yamamoto Naoto , Nagasawa Yoshikatsu , Shuto Sadanobu , Sawai Masanobu , Sudo Tadamitsu , Tsubomura Hiroshi
Published: July 2006

The shift of potential of electrodes chemically modified with biologically active substances (antigen or enzyme) due to their reactions with their counterparts (antibody or inhibitor) have been measured. It has been proved that such electrical measurements can serve as a new technique for the very sensitive detection of biologically active substances.
TEMPERATURE EFFECT ON THE INTERSYSTEM CROSSING OF ACRIDINE IN VARIOUS SOLVENTS
Authors: Uji-Ie Koji , Kasama Kunihiko , Kikuchi Koichi , Kokubun Hiroshi
Published: July 2006

lative yield of the lowest triplet state of acridine increases with increasing temperature in water, ethanol, and isopropanol, but decreases in methylmethacrylate (MMA) and polymethylmethacrylate (PMMA). In benzene it remains constant in the range of 278 to 336 K. The lowest excited singlet state is of π,π* character in all the solvents studied. The energy gap between the singlet π,π* and n,π* states is larger in the order of water>alcohols>MMA, PMMA and benzene. The intersystem crossing through the singlet n,π* state becomes less singnificant for larger energy gap.
HIGHLY EFFECTIVE CATALYTIC ASYMMETRIC SYNTHESIS OF R-(−)-PANTOLACTONE
Authors: Achiwa Kazuo , Kogure Tetsuo , Ojima Iwao
Published: July 2006

The sterically smaller N-substituents of methylpyrrolidinebisphosphines as chiral ligands in benzene except BPPM and BZPPM gave the better optical yields of R-(−)-pantolactone. Thus, BPPM-, FPPM-, APPM-, BZPPM- and PPPM-[Rh(1,5-cyclooctadiene)Cl]2 complexes gave 80.5, 78.9, 73.4, 78.5 and 67.5% optical yields respectively.
ASYMMETRIC HYDROFORMYLATION OF OLEFINS USING CHIRAL PLATINUM COMPLEX CATALYSTS
Authors: Kawabata Yasuziro , Suzuki Toshishige M , Ogata Ikuei
Published: July 2006

Hydroformylation of butenes and styrene were studied using [(−)-DIOP]PtCl2-SnCl2 catalyst system. Contrary to the reported results, each butene isomer gave 2-methylbutanal of inherent optical purity and prevailing chirality as in the case of rhodium-catalyzed reaction. The result indicates that asymmetric induction takes place before the making up of the diastereomeric alkyl-Pt intermediate.
RHODIUM CARBONYL CLUSTER CATALYZED ADDITION OF ARENES TO DIPHENYLKETENE AND ARYL ISOCYANATES
Authors: Hong Pangbu , Yamazaki Hiroshi , Sonogashira Kenkichi , Hagihara Nobue
Published: July 2006

Under pressure of carbon monoxide, rhodium carbonyl clusters catalyze a novel addition of benzene and monosubstituted benzenes to diphenylketene and aryl isocyanates to give benzene-adducts, diphenylmethyl arylketone and N-aryl benzamides, respectively.
HIGHLY SYMMETRIC STRUCTURE OF ALKALI METAL COMPLEXES OF 18-CROWN-6 AND 15-CROWN-5 IN LIQUID AND CRYSTALLINE STATES AS REVEALED BY RAMAN SPECTRA
Authors: Sato Hiroyasu , Kusumoto Yoshihumi
Published: July 2006

Raman spectra of liquid or crystalline alkali metal complexes (1:1) of 18-crown-6 and 15-crown-5 are characterized by a polarized band of high intensity near 865–870 cm−1. Raman spectra indicate the “freezing in” of conformations of crown ethers to a highly symmetric ones on complex formation.
BROMINATION OF ACTIVE HYDROGEN COMPOUNDS BY BROMOTRICHLOROMETHANE AND 1,8-DIAZABICYCLO[5.4.0]UNDECENE-7. A CONVENIENT SYNTHESIS FOR BROMIDES AND OLEFINS
Authors: Hori Youzi , Nagano Yoshiaki , Uchiyama Hideaki , Yamada Yoshio , Taniguchi Hiroshi
Published: July 2006

The DBU-BrCCl3 reagent has been found to be an excellent reagent for bromination of active hydrogen compounds. The resulted bromides further afford dibromides and/or olefins in the case of active methylene compounds by controlling the reaction conditions.
THE REACTION OF ORGANIC HALIDES WITH COBALT CARBONYL
Authors: Rhee Ilsong , Ryang Membo , Murai Shinji , Sonoda Noboru
Published: July 2006

The reaction of benzyl bromide or iodobenzene with cobalt carbonyl gave an ester and a symmetrical ketone when the reaction mixture was decomposed with iodine-methanol. The reaction between benzoyl chloride and cobalt carbonyl afforded C6H5CCo3(CO)9.
PHOTOCHEMICAL ELECTRON TRANSPORT FROM WATER LAYER TO ORGANIC LAYER VIA SODIUM ANTHRAQUINONE-2-SULFONATE BY STEPWISE TWO PHOTON EXCITATION
Authors: Inoue Haruo , Hida Mitsuhiko
Published: July 2006

An irreversible electron transport from hydroxide ion to organic molecules via sodium anthraquinone-2-sulfonate was observed in a reversed micellar system by stepwise UV (λ=365 nm) and visible light (λ>450 nm) irradiations.
EXCHANGE REACTION BETWEEN HPO42− AND C6H5OPO32− IN A HETEROGENEOUS SYSTEM WITH γ-ZIRCONIUM PHOSPHATE, Zr(HPO4)2·2H2O
Authors: Yamanaka Shoji , Hattori Makoto
Published: July 2006

The monohydrogen orthophosphate ions on the interlayer surfaces of a cation exchanger γ-zirconium phosphate, Zr(HPO4)2·2H2O, are exchanged with monophenyl orthophosphate ions of the external solution, and a new type of compound Zr(C6H5OPO3)(HPO4)·2H2O is formed. The exchange is reversible. The compound reverts to the initial γ-zirconium phosphate in orthophosphoric acid solutions.
SYNTHESES AND ELECTRICAL PROPERTIES OF ALKALI-METAL-TCNQ-CROWN ETHER COMPLEXES
Authors: Nogami Takashi , Morinaga Minoru , Kanda Yasuhiro , Mikawa Hiroshi
Published: July 2006

Complexes of crown ethers (2,3,4,5,6) and cryptand (7) with alkali-metal-TCNQ salts (8,9,10,11) were isolated in expectation of interesting electrical, magnetic, structural and optical properties. The electrical resistivities, dielectric constant, and dielectric loss of several complexes were measured.
ALDOL CONDENSATIONS WITH Co(II)-POLYMER COMPLEX CATALYSTS
Authors: Irie Kazuo , Imazawa Atsushi , Watanabe Ken-ichi
Published: July 2006

Aldol condensation of aldehydes with ketones catalyzed by complex of cobalt(II) acetate and 4-vinylpyridine-styrene-divinylbenzene copolymer gave α,β-unsaturated ketones in high yields without containing self-condensation product of ketone, and the catalyst was able to be re-used.
PREPARATION OF ACYL(p-CYANOPHENOXO)(2,2′-BIPYRIDINE)NICKEL AND REDUCTIVE ELIMINATION OF PHENYL ESTERS FROM ACYL(PHENOXO)NICKEL COMPLEXES
Authors: Kohara Teiji , Komiya Sanshiro , Yamamoto Takakazu , Yamamoto Akio
Published: July 2006

The reaction of NiR(O-p-C6H4CN)(bpy) (R = C2H5 (1a), CH3 (1b)) with CO in a 1:1 ratio affords Ni(COR)(O-p-C6H4CN)(bpy) (R = C2H5 (2a), CH3 (2b)). p-Cyanophenyl esters are reductively eliminated from 2 on treating the complexes with π-acids such as maleic anhydride and CO. Reactions of various alkyl(phenoxo)nickel complexes NiR(OC6H4X)L2 with CO give RCOOC6H4X in high yields.
APPLICATION OF THE POLANYI ADSORPTION POTENTIAL THEORY TO ADSORPTION OF SURFACTANTS FROM AQUEOUS SOLUTION ON ACTIVATED CARBON
Authors: Abe Ikuo , Hayashi Katsumi , Kitagawa Mutsuo , Urahata Toshihiro
Published: July 2006

A method, which is based on the Polanyi adsorption potential theory, is presented for estimating the adsorption isotherms of surfactants from aqueous solution onto activated carbon, from the knowledge of the critical micelle concentration, the molar volume, and a “characteristic curve” determined from a single isotherm.
1-CYCLOHEPTATRIENYLIDENE-2-PHENYLETHYLENE AND ITS INTRIGUING DIMERIZATION REACTIONS
Authors: Toda Takashi , Shimazaki Norihiko , Mukai Toshio
Published: July 2006

Treatment of 1-(2,4,6-cycloheptatrien-1-yl)-2-phenylacetylene (2) with DBU did not give the expected 1-cycloheptatrienylidene-2-phenylethylene (1) and instead its dimers (4,5, and 6). Elucidation of the structure of the dimers 4 and 5, and a plausible mechanism of this facile dimerization reactions are described.
MECHANISM OF SOLID STATE REACTION BETWEEN SrCO3 AND SiO2
Authors: Yamaguchi Osamu , Yabuno Kazuhide , Takeoka Kiyoshi , Shimizu Kiyoshi
Published: July 2006

Metastable SrSiO3 was formed during the course of the solid state reaction of SrCO3 and SiO2. The reaction mechanism was investigated by means of DTA and X-ray diffraction analysis. It was found that stable SrSiO3 is formed via two processes: (a) transformation of metastable into stable SrSiO3; (b) solid state reaction between Sr2Sio4 and Sio2.
THE CONDUCTIVITY OF GRAPHITE-ALKALI-METAL-HYDROGEN TERNARY SYSTEMS
Authors: Sano Mizuka , Inokuchi Hiroo
Published: July 2006

The effect of hydrogen on the basal-plane electrical resistivity was studied for C8K, C24K, C8Cs and C24Cs intercalation compounds. The admission of hydrogen onto cooled C8K and C24K induced a reversible change in the resistivity below 200 K, and an irreversible increase in the resistivity at room temperature.
EFFICIENT METHOD FOR THE PREPARATION OF α-TRIMETHYLSILYLCARBOXYLIC ACID ESTERS
Authors: Kuwajiima Isao , Matsumoto Kazuhisa , Inoue Tan
Published: July 2006

α-Chloroacyltrimethylsilanes are shown to behave as equivalents of α-trimethylsiiylacyl derivatives in the reaction with lithium alkoxides to afford the corresponding α-trimethylsilylcarboxylic acid esters in good yield.
CATALYTIC ACTIVITY OF TiO2 TREATED WITH HEXAFLUOROPROPYLENE OXIDE IN THE ISOMERIZATION OF 1-BUTENE
Authors: Okazaki Susumu , Kurosaki Akito
Published: July 2006

The catalytic activity of TiO2 is markedly enhanced by the treatment with hexafluoropropylene oxide. The IR spectrum indicates that the adsorbed state of hexafluoropropylene oxide on TiO2 coincides with that of hexafluoroacetone on TiO2. The isomerization of hexafluoropropylene oxide to hexafluoroacetone is elucidated to be remarkably catalyzed by TiO2.
BIOGENETIC TYPE SYNTHESIS OF 10-BROMO-α-CHAMIGRENE
Authors: Ichinose Isao , Kato Tadahiro
Published: July 2006

Bromonium ion induced cyclization of methyl 2,3-cis-farnesoate (III) was achieved by the action of 2,4,4,6-tetrabromocyclohexadienone (II) to give monocyclic bromoester (IV), which was converted into dl-10-bromo-α-chamigrene (I), a naturally occurring brominated sesquiterpenoid.
PHOTOCHEMICAL CONSTRUCTION OF THE PROTOILLUDANE SKELETON: A TOTAL SYNTHESIS OF PROTOILLUD-7-ENE AND SOME OXYGENATED DERIVATIVES
Authors: Takeshita Hitoshi , Iwabuchi Hisakatsu , Kouno Isao , Iino Mitsuaki , Nomura Danji
Published: July 2006

Starting from 4,4-dimethylcyclopentene, the protoilludane skeleton was prepared by two steps of photocycloadditions and methylation with a Grignard reagent. A series of transformations on these products led to protoillud-7-ene and some derivatives.
ENDOR SPECTRA OF Cu(SALEN) IN Ni(SALEN) SINGLE CRYSTALS
Authors: Kita Shouichi , Iwaizumi Masamoto
Published: July 2006

It is shown from the observation of the ligand hf interaction that the Cu–N bond in N,N′-ethylenebis(salicylideneiminato)copper(II) may have stronger covalency than that of bis(salicylaldoximato)copper(II) and bis(N-methylsalicylaldiminato)copper(II) which have the trans N–Cu–N configuration, while the Cu–O in the former complex may have weaker covalency than that in the latter complexes. The presence of correlation between the orbital population on the coordinating atoms and spin distribution in the ligands is also suggested.
ZINC OXIDE-INDUCED DEHYDROCHLORO-CYCLOADDITION OF N-(PHENYLSULFONYL)BENZOHYDRAZONOYL CHLORIDE
Authors: Ito Suketaka , Kakehi Akikazu , Matsuno Toshiyuki , Sasaki Tadashi
Published: July 2006

N-(Phenylsulfonyl)benzohydrazonoyl chloride reacts with electron-rich olefins such as bicyclo[2.2.1]hept-2-ene to give 1-phenylsulfonyl-Δ2-pyrazoline derivatives in the presence of zinc oxide. Zinc oxide may cause the dehydrochlorination of the hydrazonoyl chloride to lead to the formation of N-(phenylsulfonyl)benzonitrilimine, which undergoes 1,3-dipolar cycloaddition in the dipole-LUMO controlled manner.