bluuebunny/crossref_metadata_2025_split huggingface dataset:
Selective Oxidative Coupling of p-Cresol Producing an ortho-ortho Direct-linked Dimer
Authors: Asakura Kouichi , Honda Eitoshi , Osanai Shuichi 
Published: March 2006

Abstract
The oxidative coupling reactions of p-cresol were carried out in its aqueous solution using FeCl3 as the oxidizing agent. In a highly concentrated p-cresol solution, the oxidative dimeric compound readily precipitated as oil droplets and was prevented from further oxidation to the trimeric compound. The formation of an ortho-ortho linkage has become superior to that of the ortho-para linkage in a more concentrated solution.
Stereospecific Deuteration of Chelated 2,2′-Thiodiacetate(tda) in [Co(dien)(tda)]+ (dien = diethylenetriamine) Observed in the Acidic D2O Solutions
Authors: Yonemura Toshiaki , Kawai Shoji , Ama Tomoharu , Kawaguchi Hiroshi , Yasui Takaji 
Published: March 2006

Abstract
Stereospecific deuteration rates of 2,2′-thiodiacetate (tda) in s-fac- and u-fac-[Co(dien)(tda)]+ were measured at 70.2 °C in D2O (pD range 4.4 – 6.4). The observed rate constants (k′) were proportional to the [OD−]. The large k′/[OD−] value (ca. 3.8 × 106) shows that the protons on the chelated -SCH2COO− ring are much more active than those on the chelated -NHCH2COO− ring.
Narrowing Size Distribution of CdS Nanocrystals by Size Selective Photocorrosion
Authors: Matsumoto Hajime , Sakata Takao , Mori Hirotaro , Yoneyama Hiroshi 
Published: March 2006

Abstract
Sequential irradiation with monochromatic light of 500, 480, 460, 430 nm of CdS nanocrystals (Q-CdS), whose average diameter was 4.9 nm with the standard deviation of 2.0 nm, steadily narrowed the size distribution to finally give a Q-CdS colloid having an absorption spectrum characteristic of highly monodispersed Q-CdS and an absorption onset of 430 nm.
Sodium Ion Photometry in Aqueous Media by a Dibenzo-16-crown-5 Chromoionophore
Authors: Hayashita Takashi , Kunogi Kenji , Takagi Makoto , Lee Jong Chan , Bartsch Richard A 
Published: March 2006

Abstract
A new chromoionophore sym-(decyl)(2-hydroxy-5-nitrobenzyloxy)dibenzo-16-crown-5 (1) is found to selectively respond to Na+ with a detection limit of 10−3 M (1 M = 1 mol dm−3) and no interference from K+ up to 0.05 M for detection of 10.0 mM Na+ in aqueous 1,4-dioxane solution.
Formation of a Vinylcarbene Complex of Chiral [Bis(4-isopropyloxazolin-2-yl)pyridine]-dichlororuthenium(II) from 3,3-Diphenylcyclopropene
Authors: Nishiyama Hisao , Park Soon-Bong , Itoh Kenji 
Published: March 2006

Abstract
A chiral vinylcarbene complex, (pybox)RuCl2(=CH-CH=CPh2) 3, [pybox = 2,6-Bis(4(S)-isopropyloxazolin-2-yl)pyridine], was obtained by reaction of (pybox)RuCl2(C2H4) 1 and 3,3-diphenylcyclopropene 2 at 60 °C for 4h. Asymmetric transfer of the vinylcarbene moiety from 3 to styrene was realized to give the corresponding trans- and cis-vinylcyclopropanes 7 and 8 in 74% yield with 53% ee and 56% ee, respectively.
Synthesis, Crystal Structure and Spectroscopic Properties of Singly Bridged Dinuclear Platinum(II) Complex: [Pt2(terpyridine)2(μ-N,N-diethyldithiocarbamato)](PF6)3
Authors: Akiba Masaharu , Umakoshi Keisuke , Sasaki Yoichi 
Published: March 2006

Abstract
Singly bridged dinuclear platinum(II) complex, [Pt2(trpy)2(μ-dtc)](PF6)3 (trpy = 2,2′:6′,2″-terpyridine, dtc = N,N-diethyldithiocarbamate), was synthesized and structurally characterized. The compound is luminescent in the glassy solution of propylene carbonate.
Chain Compounds Formed by the Reaction of Copper(II) Carboxylate [Cu2(O2CR)4] (R = C(CH3)3, CCl3) and Bridging Ligand L (L = Pyrazine, 4,4′-Bipyridine, and 1,4-Diazabicyclo[2.2.2]octane)
Authors: Mikuriya Masahiro , Nukada Ryoji , Morishita Hiroaki , Handa Makoto 
Published: March 2006

Abstract
Reaction of copper(II) carboxylates, Cu2(O2CR)4 (R = C(CH3)3 and CCl3) with bridging ligands, L (L = pyrazine (pyz), 4,4′-bipyridine (4,4′-bpy), and 1,4-diazabicyclo[2.2.2]octane (dabco)) gave compounds, [Cu2(O2CC(CH3)3)4L]n (L = pyz (1), 4,4′-bpy (2), and dabco (3)), [Cu2(O2CCCl3)4L2]·nH2O (L = pyz; n = 1 (4), L = 4,4′-bpy; n = 1 (5), and L = dabco; n = 3 (6)), and [Cu4(OCH3)4(O2CCCl3)4(CH3OH)2(pyz)]n·2nCH3OH (7). The X-ray structure analyses of 1 and 7 show chain structures where the carboxylate dimer units or the cubane tetranuclear units are linked by the pyrazine molecules.
Selenienoquinonoid-Extended Analogues of TTF, EDT-TTF, and BEDT-TTF. New Donors and Their Conductive Complexes
Authors: Takahashi Kazuko , Tomitani Kensuke , Ise Toshihiro , Shirahata Takashi 
Published: March 2006

Abstract
2,5-Bis(1,3-dithiol-2-ylidene)-2,5-dihydroselenophene (BDTS) and its ethylenedithio (EDT-BDTS) and bis(ethylenedithio) (BEDT-BDTS) derivatives, novel extended donors with a central selenium atom, have been synthesized by convenient methods. Of these, EDT-BDTS and BEDT-BDTS having outer chalcogen atoms afforded highly conducting molecular complexes with TCNQ (σ = 13 Scm−1 on a compressed pellet).
Synthesis of a New Chitin Derivative, (1-Carboxyethyl)chitosan
Authors: Shigemasa Yoshihiro , Ishida Atsushi , Sashiwa Hitoshi , Saimoto Hiroyuki , Okamoto Yoshiharu , Minami Saburo , Matsuhashi Akira 
Published: March 2006

Abstract
A new chitin derivative, (1-carboxyethyl)chitosan, was synthesized from chitin and chitosan by the reaction with 2-chloropropionic acid, and its activation effect on canine polymorphonuclear cells (PMNs) was evaluated. The degree of substitution was increased by the repetition of the reaction, but the simultaneous N-deacetylation proceeded. N-Selective 1-carboxyethylation of chitosan was achieved by reductive N-alkylation with 2-oxopropionic acid and NaBH4.
Preferential Coordination of Mercury(II) Chloride to Ethereal Oxygens over Sulfurs in 23-Di-cyanomethylene-5,8,11,14,17-pentaoxa-2,20-dithiabicyclo[19.4.1]hexacosa-1(26),21,24-triene and 20-Dicyanomethylene-5,8,11,14,-tetraoxa-2,17-dithiabicyclo[16.4.1]tricosa-1(23),18,21-triene
Authors: Kubo Kanji , Mori Akira , Kato Nobuo , Takeshita Hitoshi 
Published: March 2006

Abstract
23-Dicyanomethylene-5,8,11,14,17-pentaoxa-2,20-dithiabicyclo[19.4.1]hexacosa-1(26),21,24-triene and HgCl2 formed a 1:1-complex in which Hg(II) was surrounded by only the five donor oxygens in a pentagonal bipyramidal coordination; the two sulfurs in the crown ring were free from the coordination. Analogously, in the HgCl2 complex of a lower homologue, 20-dicyanomethylene-5,8,11,14-tetraoxa-2,17-dithiabicyclo[16.4.1]tricosa-1(23),18,21-triene, four oxygen and one sulfur atoms were involved in the complexation, but one sulfur atom was free.
Preparation of a 1,8-Anthracene-linked Manganese(IV) Porphyrin Dimer and Its Reduction with H2O2. The O2 Evolution Stage by the Reduction of the Mn(IV)2 Complex Is Not a Rate-determining Step in the Catalytic Disproportionation of H2O2
Authors: Sasayama Masa-aki , Naruta Yoshinori 
Published: March 2006

Abstract
The reduction rate of 1,8-anthracene-linked Mn(IV) porphyrin dimer with H2O2 was photometrically determined. This process is 6.5 times faster than that of the overall O2-evolution rate in the catalytic disproportionation of H2O2 with the Mn(III) porphyrin dimer and the formation of the corresponding Mn(IV)2 complex is the rate-determining step in this catalytic reaction.
Infrared Chemiluminescence Study of Excited CO2 Produced by Molecular-Beam CO Oxidation on Pt(111)
Authors: Uetsuka Hiroshi , Watanabe Koji , Kunimori Kimio 
Published: March 2006

Abstract
The infrared emission spectra of CO2 molecules produced by CO oxidation on Pt(111) single crystal surface have for the first time been measured by molecular-beam/infrared chemiluminescence technique. The CO2 molecules were vibrationally excited (especially, antisymmetric stretch mode) compared with those desorbed from a polycrystalline Pt foil. This is the first information on the internal energy distribution from the steady state surface reaction on a well-defined single crystal surface.
Ferromagnetism in Organic Radical Crystal of 4-(p-Chlorobenzylideneamino)-2,2,6,6-tetramethylpiperidin-1-oxyl
Authors: Nogami Takashi , Ishida Takayuki , Tsuboi Hidenori , Yoshikawa Hajime , Yamamoto Hajime , Yasui Masanori , Iwasaki Fujiko , Iwamura Hiizu , Takeda Naoya , Ishikawa Masayasu 
Published: March 2006

Abstract
The magnetic measurements of the polycrystalline sample of the title radical exhibited a ferromagnetic phase transition at about 0.4 K. The relationship between the magnetic properties and crystal structures for derivatives possessing H, Br, or Ph in place of Cl is discussed. A possible mechanism of the ferromagnetic couplings was proposed.
A New Class of Stable Enol Based on the 2,2,6,6-Tetramethylheptane-3,5-diol Framework
Authors: Salter Matthew M , Suzuki Ichiro , Yamamoto Yoshinori 
Published: March 2006

Abstract
The enol content of 3-[(p-trifluoromethylphenyl)oxy]-2,2,6,6-tetramethyl-5-heptyl 3-oxobutanoate 3c in CDCl3 at room temperature is about 98%, although that of ordinary 3-oxobutanoates such as ethyl acetoacetate is around 10%.
Photoelectrochemical Responses of Gold Electrodes Co-modified with Sulfur-Containing Ruthenium Tris(2,2′-bipyridine) and Viologen Derivatives
Authors: Yamada Sunao , Kohrogi Hidehiro , Matsuo Taku 
Published: March 2006

Abstract
Gold electrodes co-modified with a sulfur-containing ruthenium tris(2,2′-bipyridine) homologue (RuS) and/or a viologen derivative (SC3V), and hexadecylmercaptane (C16SH) were prepared. In the presence of triethanolamine, the RuS-SC3V-C16SH modified electrode gave a larger anodic photocurrent than the RuS-C16SH modified one. The photocurrent was ascribed to RuS-sensitized redox cycles with SC3V as the mediator.
Novel Ferroelectric Liquid Crystals Derived from Trifluoromethylated Pyranoses Showing Very Large Spontaneous Polarization
Authors: Itoh Keizou , Takeda Mitsunori , Namekawa Masaaki , Nayuki Shinichi , Murayama Yoshinobu , Yamazaki Takashi , Kitazume Tomoya 
Published: March 2006

Abstract
Novel ferroelectric liquid crystals with a trifluoromethylated pyranose were synthesized and their mesomorphic properties were investigated. These compounds exhibited a chiral smectic C phase and showed very large spontaneous polarization over 700 nC·cm−2. Relationships between molecular structures and physical properties were discussed.
Reduction of Imines to Amines through Use of the Cp2MoH2 and Protonic Acid System
Authors: Minato Makoto , Fujiwara Yutaka , Ito Takashi 
Published: March 2006

Abstract
Imines are conveniently reduced to the corresponding amines by molybdenum dihydride Cp2MoH2 under mild conditions in good yields. In the presence of a ketone only an imine was reduced and the ketone was recovered quantitatively.
Correlation between Detrapped Valence States and Molecular Packing of Mixed-Valence Dinuclear Iron(II,III) Complexes of a Septadentate Polypyridine Ligand
Authors: Maeda Yonezo , Kawano Kota , Takashima Yoshimasa 
Published: March 2006

Abstract
Dinuclear iron(II,III) complexes with dicarboxylic acid [Fe2L(B)] (BF4)2 were prepared, where HL represents 2,6-bis[di(2-pyridylmethyl)aminomethyl]-4-methyl-phenol, H2B is dicarboxylic acid (HOOC(CH2)nCOOH). Rapid electron interexchange between iron(II) and iron(III) are observed for the complexes with n = 6 or n = 12.
Aniline-Hydroxylase Activity of Myoglobin by Coupling with a Membrane-Bound Electron Transport System
Authors: Hamachi Itaru , Fujita Akio , Kunitake Toyoki 
Published: March 2006

Abstract
Aniline-hydroxylase activity of myoglobin (Mb) can be induced by a rationally assembled semi-artificial multienzyme system of NADH - FMN - Mb on a synthetic bilayer membrane.
Synthesis and Structure of Hexacoordinate Organosilicon Compounds Having Tropolonato Ligands
Authors: Kira Mitsuo , Zhang Luo Cheng , Kabuto Chizuko , Sakurai Hideki 
Published: March 2006

Abstract
R2SiT2 type of compounds (R = alkyl, aryl, OMe; T = tropolonato) have been found to hold rather exceptionally hexacoordinate dialkyl- and diarylsilicon geometry with two bidentate tropolonato ligands both in the solid state and in solution. A facile intramolecular stereoisomerization of these neutral hexacoordinate silicon compounds was observed by temperature dependent NMR spectroscopy in solution.
Formation and Characterization of Pz3Cu(II) - Fe(III) Porphyrin Complex as a Structural Model of Cytochrome c Oxidase
Authors: Sasaki Takao , Naruta Yoshinori 
Published: March 2006

Abstract
Porphyrins with tripyrazolyl ligand (Pz3) can form a heteronuclear complex to take advantage of the difference of the coordination strength between two ligands. We synthesized an iron(III) porphyrin-copper(II) complex, which was characterized by means of UV-vis, ESR and MS spectroscopies in comparison with the parent iron(III) porphyrin.
Lanthanide Complexes with High Stability and Efficiency for the Hydrolysis of a Ribonucleotide Dimer
Authors: Yashiro Morio , Ishikubo Akira , Takarada Tohru , Komiyama Makoto 
Published: March 2006

Abstract
Lanthanide complexes with N,N,N′,N′-tetrakis[(2-pyridyl)methyl]ethylenediamine (TPEN) efficiently hydrolyze a ribonucleotide dimer, ApA, at 35 °C, pH = 7.2. The activity of La3+-TPEN is greater than that of free La3+ ion. The Ln3+-TPEN complexes are sufficiently stable in neutral aqueous solutions (the formation constants are in the range log K/mol−1 dm3 = 3.9 - 6.2). These complexes are promising for the active site of artificial ribonucleases.
Ultrasonic Effects on Electroorganic Processes. Electroreduction of Benzaldehydes on Ultrasound-vibrating Electrodes
Authors: Atobe Mahito , Nonaka Tsutomu 
Published: March 2006

Abstract
Ultrasound-vibrators (stepped horns) themselves were used as cathodes for electroreduction of benzaldehydes. Current efficiency for the reduction and selectivity for the corresponding hydrodimeric products (HD) were increased with increase in ultrasound-oscillating power.
Silylative Dimerization of Aromatic Aldehydes Catalyzed by a Thiolate-Bridged Diruthenium Complex
Authors: Shimada Hitoshi , Qü Jing-Ping , Matsuzaka Hiroyuki , Ishii Youichi , Hidai Masanobu 
Published: March 2006

Abstract
A cationic thiolate-bridged diruthenium complex [Cp*RuCl-(μ2-SPri)2RuCp*][OTf] (Cp* = η5-C5Me5, OTf = OSO2CF3) was found to be an efficient catalyst for the reaction of aromatic aldehydes with hydrosilanes in acetonitrile to give 1,2-diaryl-1,2-disiloxyethanes as the major products.
Catalytic Addition of Aromatic C–H Bonds to Acetylenes
Authors: Kakiuchi Fumitoshi , Yamamoto Yoshimi , Chatani Naoto , Murai Shinji 
Published: March 2006

Abstract
The reaction of α-tetralone with various internal acetylenes can be catalyzed by Ru(H)2(CO)(PPh3)3 and gives 1:1 addition products. Symmetrically substituted dialkyl- and diarylacetylenes gave an E/Z mixture of 1:1 coupling products in good yields. 1-Phenyl-1-butyne afforded all four possible regio- and stereoisomers. 1-Trimethylsilyl-1-propyne gave only E-isomer with C–C bond formation exclusively at the carbon atom substituted with the silyl group. Other internal acetylenes having a trimethylsilyl group also proceeded regioselectively although mixtures of stereoisomers were obtained.
Synthesis and Properties of New Liquid Crystals Containing Trifluoromethylamino Group
Authors: Kanie Kiyoshi , Mizuno Katsuya , Kuroboshi Manabu , Takehara Sadao , Hiyama Tamejiro 
Published: March 2006

Abstract
Liquid crystalline compounds containing trifluoromethylamino group were conveniently prepared and shown to exhibit mainly smectic phase in a wide range of temperatures. Their properties as a component of nematic liquid crystals are discussed.
An Effective Method to Incorporate Phosphorus Atoms into the Secondary Carbons of Pyranosides
Authors: Shi Ji-Cheng , Hong Mao-Chun , Wu Da-Xu , Liu Qiu-Tian , Kang Bei-Sheng 
Published: March 2006

Abstract
Two new chiral phosphines, methyl 3-deoxy-3-(diphenylphosphino)-4,6-O-benzylidene-α-d-altropyranoside (3) and methyl 2-deoxy-2-(diphenylphosphino)-4,6-O-benzylidene-α-d-altropyranoside (4), have been prepared in high yields from d-glucose via regioselective and stereospecific ring-opening of epoxides. 3 and 4 have been characterized by 1H, 13C, 31P NMR and MS spectra. Crystal structure of 3 has been determined by the single-crystal X-ray diffraction analysis.
Strikingly Selective Ionophoric Properties of Rigid Cyclophanes Having a Small Number of Ligating Sites
Authors: Inokuma Seiichi , Gao Shu-Ren , Nishimura Jun 
Published: March 2006

Abstract
Ionophores 4 and 5 having two acetate groups and two pyridyl groups, respectively, on the aromatic rings as well as oligo(oxyethylene) linked compounds 7a-c were prepared by Williamson ether synthesis between the corresponding halides or ditosylates and dihydroxycyclophane, which was prepared by Birch reduction of the three-bridged dimethoxycyclophane, followed by cleavage of the methoxyl groups. On the liquid-liquid extraction, 4 and 5 showed high affinities toward K+ ion and Ag+ ion, respectively. Compounds 7b and c effectively extracted large alkali metal cations.
Photochromic Reaction of a Diarylethene in Langmuir-Blodgett Films
Authors: Abe Shigeaki , Sugai Akio , Yamazaki Iwao , Irie Masahiro 
Published: March 2006

Abstract
Photochemical properties of a diarylethene with a thiophene and a benzothiophene ring in Langmuir-Blodgett (LB) films have been examined. The diarylethene, which exhibited a highly effective photochromism in fluid solution, was found to show a similar photochromism in LB films. The quantum yields of coloring and breaching reactions have been determined to be 0.27 and 0.10, respectively.
Ultra-highly Active Titanium(IV) Oxide Photocatalyst Prepared by Hydrothermal Crystallization from Titanium(IV) Alkoxide in Organic Solvents
Authors: Kominami Hiroshi , Matsuura Takeshi , Iwai Kunihiro , Ohtani Bunsho , Nishimoto Sei-ichi , Kera Yoshiya 
Published: March 2006

Abstract
Microcrystalline titanium(IV) oxide (TiO2) powders having high surface area and high crystallinity were synthesized by high-temperature hydrolysis of titanium(IV) alkoxide in organic media. They were platinized and then used for photocatalytic dehydrogenation of 2-propanol in aqueous solution. The TiO2 catalysts exhibited much higher production rates of hydrogen and acetone than representative active TiO2 catalysts (P-25).
Stereochemical Feature of Palladium(II)-Catalyzed Claisen Rearrangement
Authors: Sugiura Masaharu , Nakai Takeshi 
Published: March 2006

Abstract
The title rearrangements of the geometrical isomers of crotyl enol ethers are shown to exhibit the identical anti diastereoselection, in contrast to the high stereospecificity observed in the thermal rearrangements. These outcomes are discussed on mechanistic grounds.
High Catalytic Activity of Ion-Exchanged Nickel on Carboxymethylated Wood Char in Methanation of Carbon Monoxide
Authors: Suzuki Tsutomu , Imizu Yuzo , Satoh Yoshinobu , Ozaki Sunao 
Published: March 2006

Abstract
Catalytic behavior of ion-exchanged nickel on carboxymethylated wood char in methanation of carbon monoxide was examined at 300–500 °C. Its activity was higher than those of nickel/activated carbon and nickel/Y-zeolite. The result demonstrated that carboxymethylation of wood is an effective modification for high dispersion of metallic nickel particles on the char.
A New Method for the Preparation of A- and D-Rings of Phycocyanobilin Using Mucochloric Acid as a Starting Material
Authors: Ngwe Hla , Nakayama Eriko , Higashi Taijiroh , Kinoshita Hideki , Inomata Katsuhiko 
Published: March 2006

Abstract
Diethyl 4-ethyl-1,5-dihydro-3-methyl-5-oxo-2H-pyrrol-2-ylphosphonate and 2-ethylidene-3-methyl-1-thiosuccinimide as D-and A-rings of phycocyanobilin dimethyl ester could be synthesized by using commercially available mucochloric acid as a starting material in good yields.
Synthesis and Properties of Dimeric Antiferroelectric Liquid Crystals
Authors: Suzuki Yoshiichi , Isozaki Tadaaki , Kusumoto Tetsuo , Hiyama Tamejiro 
Published: March 2006

Abstract
Dimeric liquid crystals of general structure [(S)-n-CmH2m+1O-C6H4C6H4COOC6H4COOCH(CF3)]2(CH2)n (m = 8, 10; n = 7, 9, 11) prepared from (S)-(trifluoromethyl)oxirane exhibited stable antiferroelectric chiral smectic C phase and were shown to be good dopants for antiferroelectric liquid crystals.
Stereoselective Construction of Oxetane by Titanium(IV) Chloride Promoted [2+2] Cycloaddition of Allylsilane to α-Keto Esters
Authors: Akiyama Takahiko , Kirino Mikio 
Published: March 2006

Abstract
Titanium(IV) chloride mediated [2+2] cycloaddition of allylsilanes, which possess bulky substituents at the silicon, to α-keto esters underwent highly stereoselectively in toluene to afford oxetane derivatives in excellent yields.
A New and Efficient Method for the Selective Reduction of Nitroarenes: Use of Ammonium Sulphate-Sodium Borohydride
Authors: Gohain Sujata , Prajapati Dipak , Sandhu Jagir S 
Published: March 2006

Abstract
Various nitro compounds were selectively and rapidly reduced to their corresponding amino compounds in good yield using ammonium sulphate-sodium borohydride, a novel reduction system.
First Synthesis of Nucleosidyl Phosphorofluoridothioates and a Convenient Synthesis of Nucleosidyl Phosphorofluoridates
Authors: Dabkowski Wojciech , Tworowska Izabela 
Published: March 2006

Abstract
The first synthesis of 3′- or 5′-nucleosidyl phosphorofluoridothioates RO-P(S)(OH)F have been accomplished via nucleosidyl phosphoramidofluoridates RO-P(NPri2)F. An analogous convenient procedure has been employed to prepare 3′- or 5′-nucleosidyl phosphorofluoridates RO-P(O)(OH)F.
Reaction of [Co(η5-Cp)I(S2CNMe2)] with Diazomethane - Formation and Structures of 5-Membered 1,2,4-Cobaltadithiolene by Insertion of Methylene and 4-Membered 1,3-Cobaltathietane Formed by Desulfurization and Insertion of Methylene
Authors: Kajitani Masatsugu , Adachi Sachiyo , Takiuchi Izumi , Nagao Noriharu , Sugiyama Toru , Akiyama Takeo , Sugimori Akira 
Published: March 2006

Abstract
(η5-Cyclopentadienyl)iodo(N,N-dimethyldithiocarbamato)cobalt(III) (1) reacts with diazomethane at 0 °C to give two novel complexes: (η5-cyclopentadienyl)[(dimethylamino)thioxo-κS-methylthiomethanido-κC]iodocobalt(III) having a five-membered 1,2,4-cobaltadithiolene ring and (η5-cyclopentadienyl)(dimethylaminomethylene-κC-thiomethanido-κC)iodocobalt(III) having a four-membered 1,3-cobaltathiethane ring. The former is formed by insertion of methylene into Co-S bond and the latter by insertion of methylene into Co-S bond, accompanied by desulfurization.
Rotationally Fixed 2-Methylbenzimidazole Ligand in Nonplanar Cobalt(III)-Porphyrin Complexes
Authors: Nakamura Mikio , Ikezaki Akira 
Published: March 2006

Abstract
Dynamic 1H and 13C NMR studies have revealed that the 2-methylbenzimidazole ligand in bis(2-methylbenzimidazole)tetraphenylporphyrinatocobalt(III), [Co(tpp)(2-MeBzIm)2]Cl, is fixed relative to the porphyrin ring. Fixation of the ligand was ascribed to the nonplanar nature of the porphyrin ring caused by the severe steric repulsion between the ligand and meso-substituents.
Double-Bridged Tetrathiafulvalenophanes as Novel Electron Donors: Syntheses, Structures, and Properties of Three Structural Isomers
Authors: Takimiya Kazuo , Aso Yoshio , Ogura Fumio , Otsubo Tetsuo 
Published: March 2006

Abstract
Novel three isomeric tetrathiafulvalenophanes, of which the two TTF units are connected with double ethylenedithio spacers, have been synthesized and separated from one another. Their structures were determined by X-ray crystallographic analyses as well as 1H-NMR analyses.
Preparation of Narrow Polydispersity Polycaprolactone Catalyzed by Cationic Zirconocene Complexes
Authors: Mukaiyama Teruaki , Hayakawa Michiya , Oouchi Kunihiro , Mitani Makoto , Yamada Tohru 
Published: March 2006

Abstract
Various cationic zirconocene complexes effectively catalyzed polymerization of ε-caprolactone in a living fashion at ambient temperature to afford polycaprolactone possessing narrow molecular weight distribution (Mw/Mn = 1.06–1.3). The efficiency of the catalyst in the polymerization was enhanced by modifying the structure of cyclopentadienyl ligands.