bluuebunny/crossref_metadata_2025 huggingface dataset:
Synthesis and Electrochemical Behavior of the Complex Having μ2-Nitrosyl Moiety, as a Two-Electron Reduction Species of a {RuNO}6-Type Nitrosyl, [{Ru(μ2-NO)}2(2,2-bipy)4]2+
Authors: Nagao Hirotaka , Nagao Noriharu , Ooyama Dai , Sato Yoshinobu , Oosawa Tooru , Kuroda Hiroshi , Howell F Scott , Mukaida Masao
Published: September 2003

Synthesis of the title complex was accomplished. The structure involving a four-membered cyclic unit with negatively charged NO moieties could be established by 13C NMR measurements. Its electrochemical behavior was compared with that of [{Ru(μ2-NO)}2(acac)4], which has the same cyclic unit, but with neutral charge on NO· moieties.
Solvent-dependent Stereochemical Anomaly in the Nucleophilic Addition of Ester-derived Enolate to Bicyclo[3,3,0]octan-2-one System of Diacetone Glucos-3-ulose
Authors: Yamauchi Noriaki , Kishida Masashi , Sawada Keiju , Ohashi Yuji , Eguchi Tadashi , Kakinuma Katsumi
Published: September 2003

Solvent-dependent anomalous stereoselectivity was observed in the nucleophilic addition of ester enolate to the bicyclo[3,3,0]octane-2-one system of 1,2:5,6-di-O-isopropylidene-α-D-glucofuranulose. While most of the addition took place to the β-face of the carbonyl, the senecioate-derived enolate surprisingly preferred α-face attack in ether solvent in contrast to β-face attack in THF.
Radiolysis of CFC-113 Adsorbed on a Molecular Sieve
Authors: Yamamoto Yukio , Tagawa Seiichi
Published: September 2003

Molecular sieve 13X adsorbing CFC-113 was irradiated with γ-rays and then was soaked in water. The concentrations of Cl− and F− of the supernatant solutions increased with irradiation time, indicating that both defluorination and dechlorination of CFC-113 occur. The dechlorination proceeds by a chain reaction when 2-propanol is adsorbed on the molecular sieve together with CFC-113. It is suggested that the dehalogenation of CFC-113 is promoted by the molecular sieve.
The Kolbe Electrolytic Synthesis of Optically Active Bisphosphine Oxides
Authors: Sugiya Masashi , Nohira Hiroyuki
Published: September 2003

Optically active ethano-bridged bisphosphine oxides were conveniently synthesized by Kolbe electrolytic coupling reaction of chiral [(1,1,3,3-tetramethylbutyl)methylphosphinoyl]acetic aicd.
Catalytic Combustion of Methane over Pd Supported on Metal Oxides
Authors: Widjaja Hardiyanto , Sekizawa Koshi , Eguchi Koichi
Published: September 2003

A Pd/SnO2 catalyst demonstrated excellent activity for low temperature catalytic combustion of methane inspite of its low surface area. Palladium clusters were observed as an intimately contacted layer on fine SnO2 particles. Temperature programmed desorption of oxygen revealed that methane combustion was found to be dependent on the adsorption state of oxygen on palladium. It is considered that catalytic activity is strongly influenced by the existence of interaction between palladium and tin oxide.
Preparation of Self-Assembled Monolayer (SAM) Modified Silver Substrates for Surface Enhanced Raman Scattering (SERS)
Authors: Cao Yuehua , Li Ying-Sing
Published: September 2003

Self-assembled thiolate and sulfinate monolayers on smooth silver substrates were successfully characterized with SERS by applying for a selective etchant. The enhancement effect (EF) observed was comparable with those achieved by other techniques. The reusability of the resulted substrate was provided by UV photooxidation of the monolayer in air.
Total Synthesis of (−)-Laurequinone
Authors: Takahashi Hironobu , Tonoi Yasutoshi , Matsumoto Keiji , Minami Hiroyuki , Fukuyama Yoshiyasu
Published: September 2003

The first synthesis of (−)-laurequinone, cyclolaurane-type sesquiterpenoid isolated from the red alga Laurencia nidifica, has been achieved by using an intramolecular Heck reaction and an insertion of carbene as the key steps for the construction of quaternary carbon at the benzylic position and cyclopropane ring, respectively.
Ordered Monolayer Structures of Electrostatically Adsorbed Polystyrene Nanospheres on an Ultrathin Polymer Film Surface
Authors: Serizawa Takeshi , Takeshita Hiroko , Akashi Mitsuru
Published: September 2003

The electrostatically adsorbed polystyrene nanospheres showed an ordered monolayer structure on an ultrathin polymer film surface.
Synthesis, Structure, and Reaction of the Tetrahydroxycyclotetrasiloxane, [(i-Pr)(OH)SiO]4
Authors: Unno Masafumi , Takada Keisuke , Matsumoto Hideyuki
Published: September 2003

cis,cis,cis-1,3,5,7-Tetrahydroxy-1,3,5,7-tetraisopropylcyclotetrasiloxane (1) was synthesized. The X-ray crystallography of 1 revealed that four molecules of 1 and four molecules of water compose a cluster in the lattice. Dehydration of 1 with N,N'-dicyclohexylcarbodiimide (DCC) gave octa(isopropylsilsesquioxane) in good yield.
α-Amino acidate-Ru(II) Catalysts for Asymmetric Transfer Hydrogenation: First Utilization of α-Amino Acids as an Efficient Ligand
Authors: Ohta Tetsuo , Nakahara Shu-ichi , Shigemura Yasuhiko , Hattori Kouichi , Furukawa Isao
Published: September 2003

Ruthenium complexes, prepared by mixing potassium salt of α-amino acids and [RuCl2(arene)]2, acted as catalysts for asymmetric transfer hydrogenation of ketones from 2-propanol in the presence of KOH, and enantiomeric excesses of the products reached 92%.
AFM Observation of a Supramolecular Rod-like Structure of Bilayer Membrane Formed from Tripeptide-Containing Amphiphiles
Authors: Ariga Katsuhiko , Yamada Norihiro , Naito Masanobu , Koyama Emiko , Okahata Yoshio
Published: September 2003

Rod-like supramolecular structure composed of hydrogenbonded bilayers of tripeptide-containing amphiphiles was observed with an atomic force microscopy (AFM). Presence of peeling-off structure in monolayer thickness suggests that the rods are made from multi-wall of bilayer units.
Photo-Assisted Lithium Insertion to Li1−xMn2O4 Film Electrodes
Authors: Yamamura Satoru , Koshika Hiromichi , Nishizawa Matsuhiko , Matsue Tomokazu , Uchida Isamu
Published: September 2003

Photoelectrochemical properties of spinel Li1−xMn2O4 (0 < x < 1) thin film on ITO electrodes were studied in propylenecarbonate (PC) containing 1 M LiClO4. Cathodic photocurrents were clearly observed, suggesting the occurrence of photo-assisted lithium insertion reaction at the Li1−xMn2O4 film electrode.
Pyrimideine-Bridged Cobalt(II) Complexes with a Chiral 3-D Network Showing Weak Ferromagnetism
Authors: Nakayama Kensuke , Ishida Takayuki , Takayama Ryo , Hashizume Daisuke , Yasui Masanori , Iwasaki Fujiko , Nogami Takashi
Published: September 2003

The reaction of CoX2(X=Br, Cl) and pyrimidine (PM) in H2O gave crystals of CoPM2X2. The crystal structure analysis revealed a chiral three-dimensional network of the Co(II) ions. Weak ferromagnetism with relatively large spontaneous magnetization was observed below 5 K for both compounds.
A Novel Two-Dimensional Copper(I) Coordination Polymer with Bridging TTF: Crystal Structure of [Cu(dmtpn)2(TTF)0.5](ClO4)(dmtpn: 2,5-dimethylterephthalonitrile)
Authors: Kuroda-Sowa Takayoshi , Hirata Mutsumi , Munakata Megumu , Maekawa Masahiko
Published: September 2003

The X-ray crystal structure analysis of a copper(I) coordination compound, [Cu(dmtpn)2(TTF)0.5](ClO4) revealed the novel two-dimensional polymer framework bridged by dmtpn and TTF, which is the first example of bridging TTF coordinated to transition metal ions.
Thermal and Photochemical Formation of Dinuclear Molybdenadithiolene Complexes in One-Pot Reactions among[(Cp)2Mo2(CO)6], Elemental Sulfur and Dimethyl Acetylenedicarboxylate
Authors: Sugiyama Toru , Yamanaka Tatsuya , Shibuya Mitsuko , Nakase Risa , Kajitani Masatsugu , Akiyama Takeo , Sugimori Akira
Published: September 2003

One-pot reaction among [(Cp)2Mo2(CO)6], elemental sulfur, and dimethyl acetylenedicarboxylate (DMAD) affords several types of dinuclear molybdenadithiolene complexes. The thermal reaction gives [(Cp)(CO)2Mo{μ-S2C2(CO2Me)2}2Mo(Cp)] (2), while the photoreaction gives mainly isomeric [(Cp)Mo(CO){μ-S2C2(CO2Me)2}2Mo(CO)(Cp)] (3). The former dicarbonylmolybdenum complex easily undergoes decarbonylation, while the latter is thermally stable.
Observation of Electrochemical C60 Reduction of a Diamond Thin Film Electrode at Room Temperature
Authors: Wu Zhongyum , Yano Takashi , Tryk Donald A , Hashimoto Kazuhito , Fujishima Akira
Published: September 2003

Highly conductive boron-doped diamond thin film electrodes were used for the first time to examine the cyclic voltammetric behavior of C60 reduction at room temperature as a demonstration of the relatively wide potential window in nonaqueous media. Five reduction peaks were observable on diamond electrodes at room temperature, while four reduction peaks were observed on Pt.
New Organic Conductor Containing Magnetic Ion of Cu(II): α″-(BEDT-TTF)2KCu(SCN)4
Authors: Mori Hatsumi , Okano Tetsuro , Sakurai Naoki , Tanaka Shoji , Kajita Koji , Moriyama Hiroshi
Published: September 2003

New organic conductor containing pπ-d electrons, α″-(BEDT-TTF)2 KCu(SCN)4, is eventually prepared. The calculated band structure is one-dimensional along the donor stacking direction. The electrical conductivity at room temperature is 0.5 Scm−1 with the activation energy of 0.09 eV. The magnetic susceptibility is an addition of a Curie contribution of Cu(II) and an organic pπ part. The susceptibility of the pπ part does not follow the simple one-dimensional Heisenberg model.
Kinetic Study of the Skeletal Inversion in a Tetrairon-Sulfur Cluster {η5-C5H4(SiMe3)}4Fe4S6
Authors: Tobita Hiromi , Yamada Mikiya , Inomata Shinji , Ogino Hiroshi
Published: September 2003

A chiral cluster CpS14Fe4S6 (CpS1 = η5-C5H4(SiMe3)) was found to be fluxional due to the skeletal inversion. The line shape analysis for variable temperature 1H NMR spectra (400 MHz, toluene-d8) yielded activation parameters: ΔH‡ = 63.7 ± 16.0 kJ mol−1 and ΔS‡ = −20.8 ± 16.0 J mol−1K−1. A plausible mechanism for the dynamic behavior is proposed.
Chemical Modification of Minerals and Its Application as Silicone Rubber Reinforcing Filler
Authors: Wu Jihuai , Huang Jinling , Cheng Naishen , Shen Zhen
Published: September 2003

By ultrafinecrashing and chemical modifying, the modified mineral ultrafinepowders as silicone rubber reinforcing fillers were prepared firstly, their reinforcing effect have approached to the level of silica.
Oxidation of Hydrocarbons with Hydrogen Peroxide Catalyzed by Zinc Containing Polyoxometalate
Authors: Tangestaninejad Shahram , Yadollahi Bahram
Published: September 2003

Zinc heteropolyanion, PZnMo2W9O395−, was found to be an efficient catalyst for alkene epoxidation and oxidation of alkylaromatic compounds with 30% H2O2. Epoxide selectivities in the range of 80 to 100% was observed.
Synthesis of Dialkenyl Dichalcogenides via Alkenechalcogenolate Ions Generated by Treating Ketone p-Toluenesulfonylhydrazones with a Base and Elemental Chalcogen
Authors: Shimada Kazuaki , Asahida Mitsuharu , Takahashi Ken , Sato Yoshitaka , Aoyagi Shigenobu , Takikawa Yuji , Kabuto Chizuko
Published: September 2003

Alkeneselenolate and alkenetellurolate ions were generated by treating ketone p-toluenesulfonylhydrazones possessing an α-methylene or an α-methine group with t-BuOK and elemental selenium or tellurium, respectively, at 110-150 °C, and were converted into dialkenyl dichalcogenides by aerobic oxidation.
σ-Delocalized Hexakis(methylthio)benzene Dication: A Possible Intermediate of Pummerer-type Rearrangement of Monooxide of Hexakis(methylthio)benzene
Authors: Kobayashi Kenji , Takahashi Ohgi , Namatame Kazuhiko , Kikuchi Osamu , Furukawa Naomichi
Published: September 2003

The Pummerer-type rearrangement of monooxide of hexakis(methylthio)benzene with H2SO4 or (CF3SO2)2O gives the cyclic methylsulfonium salt. A σ-delocalized hexathia dication is proposed as an intermediate.
Substituent-Selective Mixed-Dihalogenation of Unsymmetrical Zirconacyclopentadienes
Authors: Ubayama Haruka , Xi Zhenfeng , Takahashi Tamotsu
Published: September 2003

Reactions of zirconacyclopentadienes with halogenation reagents such as NCS, NBS and I2 were highly substituent-selective. Mixed-dihalogenated 1,3-diene derivatives were obtained in one pot in good to high yields with high selectivities.
MxOy/SO42−/Dealuminated Zeolite β (M=Ti, Fe) as Novel Catalysts for Alkylation of Isobutane with 1-Butene
Authors: Sun Mingxing , Sun Jianwei , Li Quanzhi
Published: September 2003

A new kind of MxOy/SO42−/H-form dealuminated β (DHβ) catalysts prepared here were applied to alkylation of isobutane with 1-butene. The group of MxOy/SO42−/DHβ (M=Ti, Fe) catalysts has a lower rate of deactivation and higher selectivity of this alkylation than other group of Hβ and DHβ. It is proposed that the strong acid sites corresponding to the active sites for this alkylation can be formed by the interaction among DHβ, MxOy, and SO42−.
Thin Film Formation of a Protein by Laser Ablation Deposition Technique
Authors: Tsuboi Yasuyuki , Goto Masaharu , Itaya Akira
Published: September 2003

The ablation deposition technique was applied to a protein system for the first time. The sample polypeptide was silk fibroin with various excellent properties as a functional material. Chemical structures and surface morphology of thin films deposited by the technique were analyzed by infrared spectroscopy and atomic force microscopy, respectively. It is demonstrated that the ablation deposition is a powerful method to form a thin protein film.
On the Factors to Determine 77Se NMR Chemical Shifts of Organic Selenium Compounds: Application of GIAO Magnetic Schielding Tensor to the 77Se NMR Spectroscopy
Authors: Nakanishi Waro , Hayashi Satoko
Published: September 2003

The magnetic shielding tensor was calculated with the GIAO theory for some selenium compounds of versatile structures. The calculated chemical shifts of the selenium nucleus (δc(Se)) correlated well with the observed ones (δo(Se)), showing the reliability of the method. The δc(Se) values for p-substituted benzeneselenols also explained the δo(Se) values of aryl selenides of various structures around the Se-C bonds.
Construction of a Crystalline Tetramer and Infinite Network through the Dual Use of Au(I)···Au(I) and π-π Interactions
Authors: Onaka Satoru , Katsukawa Yoshitaka , Yamashita Masahiro
Published: September 2003

SC6H5 was substituted for Cl in AuCl(PPh3) and (AuCl)2(trans-Ph2PCH=CHPPh2) by reacting with Sn(SC6H5)(n-Bu)3 in refluxing THF. Both products exhibit new three-dimensional motifs which are created by Au···Au interaction and π-π interaction between phenyl rings in crystals.
Rearrangement of the CH=C-N,N21′,N22′-Linkage in the Mixed Bis(porphyrin) of Octaethylporphyrin and meso-Tetraphenylporphyrin via the CH-CH-N21,N22,N21′,N22′-Linkage
Authors: Setsune Jun-ichiro , Takeda Hirokazu , Katakami Yasuyuki
Published: September 2003

The CH=C-N,N21′,N22′-linked bis (porphyrin) consisting of an N-(vinyl)octaethylporphyrin moiety and a monoprotonated N21,N22-vinylidene-bridged meso-tetraphenylporphyrin moiety was rearranged to the CH=C-N,N21′,N22′-linked bis(porphyrin) consisting of an N-(vinyl)-meso-tetraphenylporphyrin moiety and a monoprotonated N21,N22-vinylidene-bridged octaethylporphyrin moiety. The CH-CH-N21,N22,N21′,N22′-linked bis(porphyrin) which is a key intermediate of this rearrangement was identified by X-ray crystallography.
Building Block Approach to SiO2-TiO2 Porous Materials
Authors: Hasegawa Isao , Suzuki Haruyuki , Takei Kohichi
Published: September 2003

(2-Hydroxyethyl)trimethylammonium silicate and titanium bis(triethanolaminate) were allowed for a reaction in methanol.The reaction proceeded without breakdown of the Si8O208− structure of the silicate to give SiO2-TiO2 gels. Heat-treatment of the gels at 650-1000 °C in air for 1 h yielded SiO2-TiO2 powders with high surface areas (496-127 m2 g−1, respectively), whose TiO2 component is dominantly present as anatase.
Remarkable Changes in the (N)CH3 Stretching Wavenumbers of Amines on Protonation
Authors: Ohno Keiichi , Matsuura Hiroatsu , Iwaki Toru , Suda Taiichiro
Published: September 2003

Remarkable changes in the (N)CH3 stretching wavenumbers have been observed for amines on protonation. These C–H stretching wavenumbers are related linearly to the corresponding C–H bond lengths calculated by the ab initio method. The (N)CH3 stretching bands are useful for distinguishing between free and protonated amines.
Simple Synthetic Method of Allyl- and Vinyl-Epoxides by Allylation of Carbonyl Groups with Allylic Tins Catalyzed by PbI2-HMPA
Authors: Shibata Ikuya , Fukuoka Shoji , Baba Akio
Published: September 2003

Allyl epoxides were prepared by the chemoseletive allylation at the carbonyl groups of α-bromo ketones with allylic tin, where PbI2-HMPA effected as a chemoselective catalyst. Moreover, vinyl epoxides were obtained in one pot procedure by the PbI2-HMPA catalyzed reaction of γ-chloroallyltri-n-butyltin with aldehydes. Because of the mildness of the catalyst, the formed epoxide functionalities were not decomposed.
Intramolecular Exciplex Formation and Metal Ion Recognition in 1-(1-Naphthalenecarboxy)-n-(p-substituted benzenecarboxy)oxaalkanes
Authors: Kawakami Jun , Sata Hirohito , Ebina Kohjiro , Ito Shoei
Published: September 2003

1-(1-naphthalenecarboxy)-n-(p-cyano benzenecarboxy)oxaalkanes (1NPnCN, n = 1–6) as fluorescent sensors by exciplex emission for metal ions were synthesized. we investigated the relationship between the length of the polyether chain and the metal ion recognition of 1NPnCN (n = 1–6). Changes in the fluorescence spectra of 1NPnCN (n = 1–4) were not observed by the addition of calcium and barium salts. However, the spectra of 1NPnCN (n = 5, 6) were changed.
Photoswitching of the Enzymatic Activity of Semisynthetic Ribonuclease S′ Bearing Phenylazophenylalanine at a Specific Site
Authors: Hamachi Itaru , Hiraoka Takashi , Yamada Yasuhiro , Shinkai Seiji
Published: September 2003

Photoswitching of the enzymatic activity of ribonuclease S′ was successfully carried out by site specific incorporation of phenylazophenylalanine into S-peptide skeleton by semisynthesis.
Observation of Noise Generation Induced in Ultrasonic Cavitation with Ultramicroelectrode
Authors: Jin Ji-Ye , Hayashi Takaomi , Miwa Tomoo
Published: September 2003

Voltammetric measurements at a platinum ultramicroelectrode were performed in the presence of intense ultrasound. Fast Fourier transform (FFT) of the voltammetric data shows that the subharmonics and the second harmonics of the fundamental frequency were generated when the ultrasound intensity exceeded a cavitation threshold.
Syntheses, Structures and Solution Dynamics of Anionic 5-Coordinate Pt(II) Complexes with Halide
Authors: Okeya Seichi , Hashimoto Masato , Matsuo Takahito , Yamanaka Kimiko , Sumino Tetsuya , Hashimoto Hiroshi , Kanehisa Nobuko , Kai Yasushi
Published: September 2003

Five-coordinate anionic complexes, [Pt(hfac)2X]− (X = Cl, Br, I), were prepared by reaction of [Pt(hfac)2] and [PPh4]X in CH2Cl2. A distorted square pyramidal structure was revealed by the X-ray analysis. The variable-temperature 1H and 19F NMR spectra of these complexes were explained by two independent dynamic motions in solution, which were considered good models for the ligand exchange and cis-trans isomerization reactions.
Synthesis and Electrochemical Properties of LiNiO2 Prepared via an Aqueous Solution Technique
Authors: Garcia B , Pereira-Ramos J P , Caurant D , Baffier N
Published: September 2003

LiNiO2 cathode materials have been prepared using a soft chemistry route. Precipitation of hydroxide is followed by drying and heating in the temperature range 650-900 °C under oxygen flow and leads to shorter preparation time than with powders mixing methods usually used. The sample LiNiO2 obtained at 700 °C shows the best electrochemical behaviour. This has been attributed to a low lithium deficiency.
Terphenyl and Poly(p-phenylene) Derivatives Containing Fused 1,2,5-Thiadiazole Units
Authors: Ono Katsuhiko , Adachi Akira , Okita Kouichi , Goto Midori , Yamashita Yoshiro
Published: September 2003

Soluble poly(p-phenylene) derivatives with fused thiadiazole units as well as their model compounds were synthesized and characterized by electron affinity, X-ray analysis, and n-doped conductivity.
A Highly Chemo- and Regioselective N-Acylative Alkynylation of Quinolines with Alkynylsilanes Promoted by Triflate Ion
Authors: Yamaguchi Ryohei , Omoto Yoshikazu , Miyake Masahiro , Fujita Ken-ichi
Published: September 2003

Reactions of quinolines activated by phenyl chloroformate and silver triflate with 1-alkynylsilanes proceed smoothly at 83 °C to afford 1-alkynyl-1,2-dihydroquinolines in highly chemo- and regioselective manners.
Large Deuterium Isotope Effects for Intramolecular CH Insertion Reaction of 2-Alkylphenylnitrenes
Authors: Murata Shigeru , Tsubone Yasuhiro , Tomioka Hideo
Published: September 2003

The deuterium isotope effect for the intramolecular CH insertion reaction of the nitrene photolytically generated from 2-(2-phenylethyl)phenyl azide in cyclohexane is obtained as 14.7 ± 0.3 at 20 °C, which supports the hydrogen abstraction-recombination mechanism involving the triplet state nitrene. The temperature dependence of the isotope effect suggests the operation of the tunneling of the hydrogen atom in this process.
Synthesis of Pyrrolo[1,2-a]quinoxaline and Its 4-(1-Hydroxyalkyl) Derivatives by Lewis Acid-Catalyzed Reactions of 1-(2-Isocyanophenyl)pyrrole
Authors: Kobayashi Kazuhiro , Matoba Takeshi , Irisawa Susumu , Matsumoto Takashi , Morikawa Osamu , Konishi Hisatoshi
Published: September 2003

When 1-(2-isocyanophenyl)pyrrole was treated with a catalytic amount of boron trifluoride, pyrrolo[1,2-a] quinoxaline was obtained almost quantitatively. The reaction in the presence of aldehydes or ketones gave the corresponding 4-(1-hydroxyalkyl)pyrrolo[1,2-a]quinoxalines in moderate to good isolated yields.
Stereochemistry of Palladium-catalyzed Asymmetric Transformation of Chiral 2-Alkynyl Sulfinates into Allenyl Sulfones
Authors: Hiroi Kunio , Kato Fumiko , Nakasato Hajime
Published: September 2003

Optically active 2-alkynyl p-toluenesulfinates, possessing chirality on both the α-carbons of the 2-alkynyl groups and the sulfur atoms of the sulfinates, were readily transformed into chiral allenyl sulfones with high stereospecificity in good yields by treatment with palladium acetate. The stereochemistry of the transformation was determined and the plausible mechanistic pathway is proposed.
Trityl Tetrakis(pentafluorophenyl)borate Catalyzed Stereoselective Glycosylation Using Glycopyranosyl Fluoride as a Glycosyl Donor
Authors: Takeuchi Kazuya , Mukaiyama Teruaki
Published: September 2003

A catalytic and stereoselective glycosylation of glycosyl fluorides with several glucosides is successfully performed by using a catalytic amount of trityl tetrakis(pentafluorophenyl)borate.
Near Field Fluorescence Microspectroscopy of Anthracene-Tetrachlorophthalic Anhydride Charge Transfer Microcrystal
Authors: Rücker M , Yoshikawa Hiroyuki , Sasaki Keiji , Masuhara Hiroshi , De Schryver FC
Published: September 2003

Topography, fluorescence image, and fluorescence spectrum of cast anthracene-tetrachlorophthalic anhydride polycrystalline film are measured by a near field fluorescence microspectroscopy system. Position dependence of fluorescence spectrum and intensity is examined with ∼100 nm resolution, and inhomogeneous fluorescence features are considered.
Synthesis, Spectral and Structural Characterisation of Chloro{S-benzyl-β-N-(5-methylpyrazole-3-yl)ethoxymethylenedithiocarbazato}copper(II) Derived from S-benzyl-β-N-(5-methylpyrazole-3-yl)methylenedithiocarbazide
Authors: Bera Pulakesh , Butcher Ray J , Saha Nityananda
Published: September 2003

The reaction of CuCl2, 2H2O with S-benzyl-β-N-(5-methylpyrazole-3-yl) methylene dithiocarbazide (H2L) in dry ethanol affords a novel copper(II) complex [Cu(LOEt)Cl] (1) in which a unique transformation at the carbon site of the azomethine function of the parent ligand (H2L) occurs and is ascertained by X-ray crystallographic data.
Photon-, Reductant-, and Oxidant-Induced Substitution of a CO Ligand on closo-[Cp*2Fe3S2(CO)3] (Cp* = η5-C5Me5)
Authors: Yuki Masahiro , Mitsui Toshiaki , Inomata Shinji , Okazaki Masaaki , Ogino Hiroshi
Published: September 2003

Substitution of CO in closo-[Cp*2Fe3S2(CO)3] (1) by PPh3 was accelerated upon photolysis or by treatment with reductant or oxidant to give mono(PPh3)-substituted clusters. In the redoxinduced reaction, [1]− and [1]+ were proposed as labile intermediates to substitution of CO.
Selective Radical Vinyl Polymerization of 4-Phenyl-1-buten-3-yne: Synthesis of a Novel Acetylene-Containing Polymer
Authors: Ochiai Bungo , Tomita Ikuyoshi , Endo Takeshi
Published: September 2003

The radical polymerization of 4-phenyl-1-buten-3-yne (1) was carried out to obtain a polymer having acetylene moieties in the side chain. The polymer prepared at 60 °C was consisted of specific 1,2-polymerized unit. The Q-e value of 1 was estimated form the copolymerization with methyl methacrylate to demonstrate a fully delocalized character of the propagating radical.
Moiré Pattern of Bilayered Fatty Acid Monolayers Based on Dark Field Imaging
Authors: Kajiyama Tisato , Oishi Yushi , Suehiro Kazuaki , Hayashi Yukinori , Kuriyama Keisuke , Kuri Taishi
Published: September 2003

Moiré patterns of bilayered fatty acid monolayers prepared by the Langmuir-Blodgett method were successfully observed on the basis of dark field imaging by using transmission electron microscope for the first time. The moiré lines of the bilayered fatty acid monolayers prepared by the continuous compression method were warped and discontinuous, whereas that prepared by the multi-step creep method were straight and continuous. These differences apparently reflect their crystallographical regularities.
A New Efficient Method for Catalytic Hydrolysis of Thioglycoside
Authors: Uchiro Hiromi , Wakiyama Yoshinari , Mukaiyama Teruaki
Published: September 2003

A new and efficient method for catalytic hydrolysis of thioglycosides was successfully developed. Various thioglycosides were smoothly hydrolyzed to afford the corresponding 1-hydroxy sugars in high yields. The hydrolysis of disaccharides was took place smoothly without accompanying no anomerization of existing glycosidic bond.
Fine Control of Pore Size of Highly Ordered MCM-41 by Using Template Mixtures of Dodecyltrimethylammonium Bromide/Hexadecyltrimethylammonium Bromide with Various Molar Ratios
Authors: Namba Seitaro , Mochizuki Atsushi , Kito Muneharu
Published: September 2003

MCM-41 materials were prepared hydrothermally by using template mixtures of hexadecyltrimethylammonium/dodecyltrimethylammonium (C16TMABr/C12TMABr) with various molar ratios. The MCM-41 materials thus prepared were highly ordered and their pore sizes can be finely controlled by changing the C16TMABr/C12TMABr molar ratio.
Polymerization of Propylene by Nonbridged Zirconocene Complexes
Authors: Kimura Keisuke , Takaishi Kiyoka , Matsukawa Tetsuya , Yoshimura Takashi , Yamazaki Hiroshi
Published: September 2003

Nonbridged zirconocene dichlorides, (1,2-Me2-4-RC5H2)2ZrCl2(R = Me(3), Ph(4), p-FC6H4(5), 2-furyl(6), 2-thienyl(7), and Fc(8)), and meso- and rac-(1-Me-3-PhC5H3)2ZrCl2(9 and 10), in the presence of MAO show a high catalytic activity (8.1∼17.4 × 106 gPP/molZr·h) in the polymerization of propylene and produce almost an atactic elastomeric polymer of high molecular weight (Mw = 10.5∼23.2 × 104). In contrast, rac-(1-Me-3-t-BuC5H3)2ZrCl2(12) shows very low activity and produces a rather high isotactic polymer of low molecular weight.
Controlling Factor of Electrocatalytic Activity of Iron-containing Carbon Materials
Authors: Ozaki Jun-ichi , Nozawa Kiyomi , Oya Asao
Published: September 2003

Iron-containing carbons were prepared from mixtures of ferrocene and poly(furfuryl alcohol) by varying their preparation conditions. The electrocatalytic activity of the carbons was assessed with Fe(CN)63−/Fe(CN)64− redox reaction, and was revealed to be strongly affected by the fraction of a turbostratic carbon structure (Ts-phase) in the material determined by X-ray diffraction.
Enzymatic Synthesis of Carbocyclic Analogue of Fructose 2,6-bisphosphate with 6-Phosphofructo-2-kinase
Authors: Fukusima Yasumasa , Hayashi Mayumi , Fujiwara Masaaki , Miyagawa Tetsuya , Yoshikawa Genichiro , Yano Takuma , Nakajima Hiroshi
Published: September 2003

cF26P2 was synthesized enzymatically by the regioselective phosphorylation of cF6P with PFK2 and ATP. cF26P2 was found to be much stabler in the acidic condition than F26P2 and could activate the glycolytic pathway enzyme PFK.
Studies on the Structure and Acid Properties of GaMCM-41 Mesoporous Molecular Sieve
Authors: Okumura Kazu , Nishigaki Kyoichi , Niwa Miki
Published: September 2003

GaMCM-41 was synthesized and the structure and acid properties were investigated. Powder X-ray diffraction and nitrogen adsorption isotherm proved high uniform hexagonal structure of the synthesized GaMCM-41. Temperature programmed desorption (TPD) of ammonia and octane cracking indicated that the GaMCM-41 possessed strong acid sites in comparison with AlMCM-41.
Femtosecond Diffuse Reflectance Spectroscopy of Aqueous Titanium(IV) Oxide Suspension: Correlation of Electron-Hole Recombination Kinetics with Photocatalytic Activity
Authors: Ohtani Bunsho , Bowman Robert M , Colombo D Philip , Kominami Hiroshi , Noguchi Hidenori , Uosaki Kohei
Published: September 2003

Pump-probe diffuse reflectance measurements were carried out on particulate titanium(IV) oxide photocatalysts in the form of aqueous suspension and dry powder. A linear relation between second-order rate constants of electron-hole recombination for the suspension and powder systems was seen by analyses of decay profile of charge carriers. Presence of air gave negligible effect on the recombination kinetics, but loading of platinum (Pt) significantly reduced the rate constant.
Origin of Deactivation of Chlorobenzene in Aromatic Electrophilic Substitution
Authors: Tomoda Shuji , Takamatsu Kuniyuki , Iwaoka Michio
Published: September 2003

Deactivation of chlorobenzene in aromatic electrophilic substitution may arise from the unique energy level of chlorine lone pair orbital which is higher than the subjacent π-molecular orbital of benzene (π1), in sharp contrast to the widely accepted concept that inductive electron-withdrawing property (−I effect) of chlorine should be responsible for ring deactivation. The role of π1 in protonation at C-4 is found to be as important as the frontier orbital (π2).
A New Active Catalyst for Single Step Synthesis of Methyl Isobutyl Ketone from Acetone
Authors: Coh Byoung-Youl , Hur Jin Mok , Lee Ho-In
Published: September 2003

2wt% Ni-CaO catalyst prepared by sol-gel process showed 70-80% acetone conversion and 60% MIBK selectivity at 200 °C of reaction temperature. The incorporated Ni influenced CaCO3, catalyst intermediate, to readily decompose into CaO, active basic component, and CO2 at even 500 °C. Meanwhile, Co or Pd did not influence CaCO3 decomposition at the same temperature of 500 °C and showed no catalytic activity. That is, Ni played a role as promoter for catalyst activation as well as active site of hydrogenation.
External Magnetic Field Effect on the Photoinduced Magnetization in a Cobalt Iron Cyanide
Authors: Einaga Yasuaki , Ohkoshi Shin-ichi , Sato Osamu , Fujishima Akira , Hashimoto Kazuhito
Published: September 2003

We studied the external magnetic field effects on the photoinduced magnetization of a cobalt iron cyanide, K0.4Co1.3[Fe(CN)6]·5H2O. Photoinduced magnetization value was increased ca. 20 % at maximum under the magnetic field of 50000 G at 5 K. In addition, in the ferrimagnetic region (T < Tc = 26 K), the external magnetic field accelerated the rate of photoinduced spin generation. Those data suggest that external magnetic field increases magnetic interaction between the excited state and spin clusters.
Construction of a Homooxacalix[3]arene-based Dimeric Capsule Cross-linked by a Pd(II)-pyridine Interaction
Authors: Ikeda Atsushi , Yoshimura Makoto , Tani Fumio , Naruta Yoshinori , Shinkai Seiji
Published: September 2003

Homooxacalix[3]arenes bearing 4-pyridyl groups at the 7,15,23-positions formed a dimeric complex with Pd(II). Only when the homooxacalix[3]arene was preorganized to a cone conformation, a dimeric molecular capsule with D3h symmetry was yielded. Mass spectral studies established that CD2Cl2 is included in this cavity.
X-Ray Structure of Hexakis(2,3,6-tri-O-acetyl)-α-cyclodextrin
Authors: Harata Kazuaki
Published: September 2003

Crystal structure of hexakis(2,3,6-tri-O-acetyl)-α-cyclodextrin was determined by the X-ray method. The molecule with twofold crystallographic symmetry has a cavity with the shape of a rectangular box. Both ends of the cavity are closed by acetyl groups and a water molecules is included in the molecular cage.
How Does Senkou-hanabi Fire in 10T Magnetic Field?
Authors: Nakabayashi Seiichiro , Aogaki Ryoichi , Iguchi Umefumi , Nawa Masayoshi
Published: September 2003

The magnetic field effect to a traditional Japanese firework; Senkou-hanabi, was investigated by using a superconducting magnet. The lifetime of burning Senkou-hanabi was changed by the magnetic volume force induced by the gradient magnetic field.
A Mild and Facile Reduction of Azides to Amines by N,N-Dimethylhydrazine and Catalytic Ferric Chloride
Authors: Kamal Ahmed , Reddy B S Narayan
Published: September 2003

Reaction of a variety of azido compounds with N,N-dimethylhydrazine in the presence of a catalytic amount of ferric chloride hexahydrate in methanol results in excellent yields of the corresponding amino compounds. This reductive system is compatible with a wide assortment of functional groups and has also been extended towards the synthesis of pyrrolo[2,1-c][1,4]benzodiazepine antibiotics.
Two Reaction Paths at Different Temperatures in the Reduction of Nitrogen Monoxide with Hydrogen over Supported Palladium Catalysts
Authors: Ueda Atsushi , Nakao Takayuki , Azuma Masashi , Kobayashi Tetsuhiko
Published: September 2003

Two conversion maxima at 373K and 573K have been found to appear in the NO reduction with H2 over metal oxides supporting Pd, when O2 is present in the stream of reactants. At the lower temperature, NO directly reacts with H2, but primarily produced NO2 on the catalyst can successively react with H2 in preference to the simple combustion of H2 at the higher temperature.
Pertraction of Hydrophobic Organic Solutes with a Hydrophobic Membrane
Authors: Igawa Manabu , Abe Toshiyuki , Okochi Hiroshi
Published: September 2003

Pertraction of hydrophobic organic solutes with a hydrophobic membrane is a continuous separation process, which can be used as a substitute of activated carbon. The permeability was affected by the hydrophobicity of the solute and the dissociation in the receiving phase. The pertraction of a hydrophobic solute against its concentration gradient is also possible under a concentration gradient of hydroxide ion.
Self Assembled Growth of Nano Particulate Porous ZnO Thin Film Modified by 2,9,16,23-Tetrasulfophthalocyanatozinc(II) by One-Step Electrodeposition
Authors: Yoshida Tsukasa , Miyamoto Kenichi , Hibi Naomi , Sugiura Takashi , Minoura Hideki , Schlettwein Derck , Oekermann Torsten , Schneider Gerhard , Wöhrle Dieter
Published: September 2003

A cathodic electrolysis in an aqueous mixture of Zn(NO3)2 and water soluble phthalocyanine, 2,9,16,23-tetrasulfophthalocyanatozinc(II)(TSPcZn), allows self organization of ZnO crystal growth and adsorption of the dye molecules. This process results in the formation of transparent and homogeneously blue thin film consisting of nano-particulate porous ZnO modified by TSPcZn.
Synthesis and Properties of Bis(5-alkoxytropolonato) Metallomesogens
Authors: Mori Akira , Takemoto Manabu , Mori Ryoji , Takeshita Hitoshi , Ujiie Seiji , Vill Volkmar
Published: September 2003

Bis(5-alkoxytropolonato)copper(II) complexes showed mesogenic properties. The corresponding zinc(II) complexes were not mesogenic although they have lower melting points than the copper complexes. The longer alkyl chains enhanced the appearance of highly ordered smectic phases and secondary alkyl chains reduced mesogenic properties.
Preparation and Conformational Properties of 1,8-Bridged Fluorenophanes
Authors: Tsuge Akihiko , Araki Tadashi , Noguchi Yuji , Yasutake Mikio , Moriguchi Tetsuji , Sakata Kazunori
Published: September 2003

Novel 1,8-bridged fluorenophanes consisting of benzene, benzoquinone, or naphthalene ring have been prepared. Their conformational properties are clarified by the NMR spectra and the X-ray analysis, especially in terms of a shielding effect on 9-protons of the fluorene unit. The dynamic structure was also examined by the variable-temperature NMR spectroscopy.
Synthesis and Photophysical Behavior of Porphyrins with Two C60 Units
Authors: Higashida Suguru , Imahori Hiroshi , Kaneda Takahiro , Sakata Yoshiteru
Published: September 2003

Two C60 units were covalently linked to 5,10-(cis-) or 5,15-(trans-) positions at a meso-tetraphenylporphyrin via pyrolidine spacers. 1H NMR, UV-visible absorption, and fluorescence spectroscopy showed that there is a considerable interaction among the chromophores in cis-isomers due to the close proximity of the two C60 moieties.
Synthesis of Dihydropyrroles and Tetrahydropyridines by the Intramolecular Cyclization of O-Methylsulfonyloximes Having an Active Methine Group
Authors: Uchiyama Katsuya , Yoshida Masayuki , Hayashi Yujiro , Narasaka Koichi
Published: September 2003

3,4-Dihydro-2H-pyrroles and 2,3,4,5-tetrahydropyridines are prepared from (E)-O-methylsulfonyloximes having an active methine group at γ- and δ-positions, respectively, by the treatment with DBU.
Photoionization Threshold of Perylene on Water Surface as Measured by Synchrotron Radiation
Authors: Inoue Takanori , Sasaki Shin-ya , Tokeshi Manabu , Ogawa Teiichiro
Published: September 2003

Photoionization efficiency of perylene on water surface was measured in the 165-260 nm region by synchrotron radiation. The photoionization threshold was determined to be 5.9 eV and agreed well with that determined in the laser two-photon ionization. This finding indicates that the water surface is more hydrophobic than its bulk.
Exfoliation of Layered Oxovanadium Phosphate VOPO4·2H2O in Tetrahydrofuran through Intercalation of 4-Butylaniline
Authors: Nakato Teruyuki , Furumi Yoko , Okuhara Toshio
Published: September 2003

VOPO4 intercalated with 4-butylaniline was exfoliated in THF to form a homogeneous solution, thereby yielding delaminated sheets. The exfoliated oxide layers were reassembled into a thin film morphologically much differed from the intercalation compound.
Preparation of New Poly(phenylene vinylene) Type Polymers by Ni-promoted Polycondensation and Their Photoluminescent Properties
Authors: Yamamoto Takakazu , Xu Yuqing , Koinuma Hideomi
Published: September 2003

Poly(p-phenylene vinylene) type polymers having biphenyl-4,4′-diyl units have been prepared by organometallic polycondensation. They are photoluminescent and electrochemically active, and are considered to take a stacked and liquid crystalline structure depending on the substituent.
A New Practical and Convenient Access to the Synthesis of N,N-Dialkyl-3,3,3-trifluoropropanamides
Authors: Yamanaka Hiroki , Mantani Toshiya , Shiomi Keisuke , Ishihara Takashi
Published: September 2003

N,N-Dialkyl-3,3,3-trifluoropropanamides were readily synthesized in good to excellent yields through N,N-dialkyl(3,3,3-trifluoro-1-propynyl)amines, which were generated by the reaction of N,N-dialkyl(2,2,3,3,3-pentafluoropropyl)- or -(2,3,3,3-tetrafluoro-1-propenlyl)amines with lithium diisopropylamide in the presence or absence of N,N′-dimethylpropyleneurea at room temperature or 0 °C.
New Twin-Type Troponoid Liquid Crystals with a Smectic C Phase
Authors: Mori Akira , Takemoto Manabu , Vill Volkmar
Published: September 2003

Twin-type troponoid liquid crystals show a monotropic smectic C phase while the corresponding benzenoids are non-mesogenic. The corresponding troponoid monomers, show a monotropic smectic A phase, could form a head-to-tail alignment. In the twins, molecules have to shift to form a head-to-tail alignment since the dipole moment of the two tropolone parts directs oppositely.
New Inorganic-Organic Hybrid Li+ Ion Conducting Polymer Electrolytes
Authors: Fujinami Tatsuo , Sugie Kazuhiro , Mori Kenji , Mehta Mary Anne
Published: September 2003

A new series of inorganic-organic hybrid polymer electrolytes containing the aluminate structure were prepared. Incorporation of stronger Lewis acid sites into the polymer in the region of the aluminate bond was effective for enhancing ionic conductivity. The materials were shown to be single Li+ ion conductors.
Copper as an Effective Additive for Enhancement of Catalytic Activity of Cs2.5H1.5PVMo11O40 for Selective Oxidation of Lower Alkanes
Authors: Mizuno Noritaka , Han Wonchull , Kudo Tetsuichi
Published: September 2003

Copper was found to be an effective additive to increase the yield of the selective oxidation products likely due to the promotion of the reoxidation of the catalyst.
Chlorinative Cleavage of Digermoxanes Initiated by Photo-induced Electron Transfer
Authors: Mochida Kunio , Takekuma Kakumasa , Watanabe Hideaki , Murata Shigeo
Published: September 2003

Irradiation of digermoxanes(R3GeOGeR3) in CCl4-CH3CN in the presence of 1,2-dicyanonaphthalene (DCN) afforded chlorogermanes, digermyperoxides, and hexachloroethane. Fluorescence of DCN was quenched by R3GeOGeR3 with a rate of 109 M−1s−1 order. A mechanism of free-radical chlorination involving R3GeOGeR3 cation radicals is proposed.
A New Water-Soluble Host Molecule Derived from Thiacalixarene
Authors: Iki Nobuhiko , Fujimoto Toyohisa , Miyano Sotaro
Published: September 2003

A new water soluble host molecule, thiacalix[4]arenetetrasulfonate(TCAS), was obtained by direct sulfonation of p-tert-butylthiacalix[4]arene. TCAS showed size- and shape-selectivity to bind small chlorinated organic molecules in its hydrophobic cavity by a 1:1 or 1:2 manner in aqueous solution.
Evaluation of Avidin-Biotin Binding Using a Biotin Labeled with Daunomycin by Photoacoustic Spectrometry
Authors: Sugawara Kazuharu , Yamaguchi Yuuki , Nago Masaharu , Futamata Masami , Hoshi Suwaru , Akatsuka Kunihiko
Published: September 2003

A method of evaluation for avidin-biotin binding using photoacoustic spectrometry (PAS) was developed. Biotin labeled with daunomycin was prepared. The avidin-biotin binding between avidin and the labeled biotin (LB) makes avidin colored. This is because the part of daunomycin is taken in biotin sites of avidin. Therefore, the concentration of avidin could be estimated based on measurement of the LB with avidin by PAS.
Cross-correlation TOF Method by Pseudorandom Pulse Discharge
Authors: Kawaguchi Hisashi , Ohoyama Hiroshi , Kasai Toshio
Published: September 2003

A new cross-correlation time-of-flight (CC-TOF) method for pulsed metastable atom beam is demonstrated. In this method, we modulate the grid voltage for the metastable atom formation with pseudorandom pulse sequence instead of mechanical chopping. The TOF spectrum convoluted from the observed CC-TOF spectrum is found to nicely reproduce the conventional TOF spectrum, indicating useful applicability of the new method.
Self-Coextraction of Sodium Ions with Calix[4]arene Tetracarboxylate
Authors: Ohto Keisuke , Ishibashi Hideaki , Inoue Katsutoshi
Published: September 2003

Solvent extraction of sodium ions with p-t-octylcalix[4]arene tetracarboxylate from an aqueous solution containing sodium ions (0.1 mol dm−3) into chloroform was investigated. It was found that two sodium ions are simultaneously extracted by a single molecule of the extractant and that extraction of the second sodium ion is facilitated by the complexation of the first with the calix[4]arene derivative. The extraction behavior of sodium ions strongly supports the coextraction mechanism of sodium and another metal ion with calix[4]arene tetracarboxylate.
Electrochemistry of a Fullerene/Ammonium Lipid Composite Film on an Electrode in Water. Generation of C603−
Authors: Nakashima Naotoshi , Kuriyama Takuto , Tokunaga Takeshi , Murakami Hiroto , Sagara Takamasa
Published: September 2003

We describe for the first time the finding that C60 embedded in a cast film of triple-chain ammonium lipid, tridodecylmethylammonium bromide, on an electrode shows three-consecutive one-electron transfer processes leading to C603− in aqueous solution.
Highly Stereoselective Synthesis of 1,2-trans-Glycosides Using p-Chlorobenzylated Glycosyl Carbonate as Glycosyl Donor
Authors: Mukaiyama Teruaki , Miyazaki Kazuo , Uchiro Hiromi
Published: September 2003

A new and efficient method for catalytic stereoselective synthesis of 1,2-trans-glycosides was successfully established by use of 2,3,4,6-tetra-O-p-chlorobenzyl-β-D-glucopyranosyl phenyl carbonate as a stable and easily-available glycosyl donor. Several β-D-glucopyranosides were prepared in good yields with high stereoselectivities.
SiO2 Catalyzed Henry Reaction: Microwave Assisted Preparation of 2-Nitroalkanols in Dry Media
Authors: Kumar H M Sampath , Reddy B V Subba , Yadav J S
Published: September 2003

Nitroalkanes undergo rapid addition to aromatic aldehydes (Henry reaction) on the surface of activated SiO2, when irradiated with microwave, to afford 2-nitroalkanols in moderate to high yields.
Photo-thermally Induced Phase Transition in Vanadyl Phthalocyanine Thin Film
Authors: Amao Yutaka , Sato Osamu , Fujishima Akira , Hashimoto Kazuhito
Published: September 2003

A vanadyl phthalocyanine (VOPc) film (Phase I) on a mica substrate was prepared and photoinduced phase transition of VOPc was tried. Changes in absorption spectra show that Phase I structure is converted to Phase II structure by the irradiation with He-Ne laser. The surface structural changes of VOPc were also observed by using atomic force microscopy (AFM). Experimental results suggest that the phase transition was induced by photo-thermal processes.
Evidence for Ionic Intermediates in Fluorination of Alkenes with N–F Type of Reagents
Authors: Zupan Marko , Škulj Primoz , Stavber Stojan
Published: September 2003

2-Exo-acetamido-7-syn-fluoro norbornane and 2-exo-acetamido-7-anti-fluoro norbornane were formed in the room temperature reaction of bicyclo[2.2.1]heptene in acetonitrile with N–F type reagents [1-chloromethyl-4-fluoro-1,4-diazoniabicyclo[2.2.2]octane bis(tetrafluoroborate) (F–TEDA), 1-fluoro-4-hydroxy-1,4-diazoniabicyclo[2.2.2]octane bis(tetrafluoroborate) (NFTh) and 2,6-dichloro-1-fluoropyridinium triphlate (FPD–T)]. Such Meerwein-Wagner rearrangement and hydride shift indicated the formation of fluoro carbonium ions.
The First Direct Detection of Rapid Migration of Acidic Protons between Heteropolyanions in H3PW12O40·nH2O (n < 6) by 31P NMR
Authors: Uchida Sayaka , Inumaru Kei , Dereppe Jean M , Misono Makoto
Published: September 2003

The dynamic behavior of the acidic protons in a hydrated pseudoliquid phase of H3PW12O40·nH2O (n < 6) was analyzed by means of 31P magic-angle spinning (MAS) NMR. With this method the “isolated” acidic protons on heteropolyanions were distinguished from protons in H3O+ and H5O2+. At 173 K, as evidenced by four 31P MAS NMR peaks, these “isolated” protons were distributed among polyanions so that heteropolyanions directly bonding to 0, 1, 2, and 3 isolated acidic protons(s) coexist. At 298 K, these peaks coalesced, directly demonstrating for the first time the rapid migration of the isolated protons between heteropolyanions.
Syntheses of 4,5-Dihydroselenophenes by Using TiCl4 and Zn
Authors: Koketsu Mamoru , Miyajima Yasutaka , Ishihara Hideharu
Published: September 2003

Se-3-oxoalkyl-selenocarboxlates on treatment with TiCl4 and Zn afforded 4,5-dihydroselenophenes in moderate yields.
Formation of Copper Phthalocyanine Films by Electrophoretic Deposition
Authors: Sato Naoki , Saji Tetsuo
Published: September 2003

A copper phthalocyanine (1) film was formed on an indiumtin oxide (ITO) electrode with a short deposition time by electrophoretic deposition using a 2-butanone dispersion containing 1 and a small amount of iodine. A spectroscopic study showed that the crystalline form of 1 is maintained throughout the film formation processes.