bluuebunny/crossref_metadata_2025_split huggingface dataset:
A Novel Catalyst System, Antimony(V) Chloride-Lithium Perchlorate (SbCl5-LiClO4), in the Friedel-Crafts Acylation Reaction
Authors: Mukaiyama Teruaki , Suzuki Kaoru , Han Jeong Sik , Kobayashi Shu 
Published: May 2006

Abstract
A novel catalyst system consisting of antimony(V) chloride (SbCl5) and lithium perchlorate (LiClO4) effectively promotes the Friedel-Crafts acylation reaction of aromatic compounds with acid anhydrides.
Diastereoselective Addition of Organometallics to α-Keto Esters Bearing chiro-Inositol Derivatives as Chiral Auxiliaries
Authors: Akiyama Takahiko , Nishimoto Hiroyuki , Ishikawa Keiichiro , Ozaki Shoichiro 
Published: May 2006

Abstract
The nucleophilic addition of organometallics to α-keto esters derived from (1l)-1,2:5,6-di-O-cyclohexylidene-3-t-butyldimethylsilyl-chiro-inositol afforded the corresponding α-hydroxy esters of high diastereomeric excess (up to 98% de). Grignard reagents attacked from re-face, while organolithium reagents preferred si-face attack.
Preparation of Pyrazole and Pyrazoline Derivatives by Intramolecular Reaction of Hydrazones
Authors: Shen Jing-Kang , Katayama Hajime 
Published: May 2006

Abstract
Pyrazole and pyrazoline derivatives are prepared by the intramolecular cyclization reaction of a hydrazonyl group with formyl or keto groups in the presence of a Lewis acid.
Electrochemical Synthesis of Soluble Poly(n-alkylphenylene)s
Authors: Shimura Tadashi , Funaki Hiroshi , Nishihara Hiroshi , Aramaki Kunitsugu , Ohsawa Toshiyuki , Yoshino Katsumi 
Published: May 2006

Abstract
Electrochemical oxidation of n-alkylbenzenes (alkyl = butyl, hexyl, octyl, and dodecyl) in 0.1 mol dm−3 n-Bu4NBF4-nitromethane with a catalytic amount of NiCl2[P(allyl)2Ph]2 affords poly(n-alkylphenylene)s soluble in common organic solvents. n-Alkylbenzene with a longer alkyl chain gives a soluble polymer with higher molecular weight, more positive oxidation potential and larger band gap.
Catalytic Dehydrochlorination of 1,1,2-Trichloroethane(TCE) into 1,1-Dichloroethene(DCE) over Cesium Nitrate Supported on Silica Gel
Authors: Mochida Isao , Yasumoto Yoshinori , Fujitsu Hiroshi , Kojima Yasuhiro 
Published: May 2006

Abstract
Catalytic activity of silica gel-supported cesium salts was examined for the dehydrochlorination of TCE into DCE by recovering hydrogen chloride. Among the salts, CsNO3 showed the best activity, although it was converted into CsCl during the reaction. High dispersion of CsNO3 on silica gel may be a major reason of the high activity.
Synthesis and Characteristics of Novel Transition Metal Complexes with High Superoxide Dismutase Activity
Authors: Mori Yutaka , Sato Masaru , Iida Takeaki 
Published: May 2006

Abstract
Several N,N,N′,N′-Tetrakis(2-pyridylmethyl)ethylenediamine (TPEN) analogues were synthesized and the superoxide dismutase (SOD) activities of their Fe(II), Co(III), Mn(II), and Ni(II) complexes were investigated. The results indicated that N,N,N′,N′-tetrakis(2-pyridylmethyl)-(±)-trans-1′,2′-cyclohexanediamine (TPCN) and Fe(II) formed [Fe(II)3(TPCN)2] complex. The [Fe(II)3(TPCN)2] complex was found to increase the SOD activity and exhibited longer stability than that of [Fe(II)TPEN]2+ in aqueous solution.
Synthesis and Chromogenic Properties of New Water-Soluble Glycosylated Porphines
Authors: Kohata Katsunori , Yamaguchi Yuichi , Higashio Hisao , Odashima Tsugikatsu , Ishii Hajime 
Published: May 2006

Abstract
We synthesized two kinds of new water-soluble glycosylated porphines, 5,10,15,20-tetrakis[4′-(β-d-glucopyranosyl)phenyl]porphine and 5,10,15,20-tetrakis[3′-(β-d-glucopyranosyl)phenyl]porphine, and investigated their chromogenic properties and reactivities with copper(II) ion.
Gas Phase Basicities of α-Trimethylsilylstyrenes. Intrinsic Effect of α-Trimethylsilyl Group on the Stability of Carbenium Ions
Authors: Mishima Masaaki , Ariga Toshifumi , Tsuno Yuho , Ikenaga Kazutoshi , Kikukawa Kiyoshi 
Published: May 2006

Abstract
Gas phase basicities of α-trimethylsilylstyrenes have been determined by measuring proton transfer equilibrium constants. Basicity of α-trimethylsilylstyrene was found to be comparable to that of α-alkylstyrene, suggesting that α-trimethylsilyl group as well as α-alkyl group stabilizes a carbenium ion.
Migration of Acetoxy Group from Tetracoordinated Tellurium Compound, 12,12-Diacetoxy-5H,7H-dibenzo[b,g][1,5]tellurathiocin, Induced by Transannular Te-S Interaction
Authors: Fujihara Hisashi , Takaguchi Yutaka , Furukawa Naomichi 
Published: May 2006

Abstract
The reaction of 12-oxo-5H,7H-dibenzo[b,g][1,5]tellurathiocin with acetic anhydride afforded a 12,12-diacetoxy-substituted tellurane (3). Heating of the benzene solution of 3 gave a remote α-acetoxylated sulfide and the parent 5H,7H-dibenzo[b,g][1,5]tellurathiocin.
A Novel Metathesis Catalyst Consisting of Non-transition Elements. The Metathesis of Alkenes over Tetramethyltin/Dehydroxylated Alumina
Authors: Ahn Ho-Geun , Yamamoto Kei , Nakamura Ryuichi , Niiyama Hiroo 
Published: May 2006

Abstract
Sn(CH3)4/Al2O3 prepared by the deposition of Sn(CH3)4 to alumina which was previously dehydroxylated by heating at 773–1223 K was found to be an active catalyst for the metathesis of alkenes. The catalytic activity greatly depended on the pretreatment temperature of the alumina and the amount of Sn(CH3)4 deposited.
First Observation of a Thermal Contraction-Type Phase Transition in A-T Isobars of Monolayers at the Air/Water Interface with Temperature Increase
Authors: Kato Teiji , Akiyama Hideyuki , Yoshida Masaaki 
Published: May 2006

Abstract
A-T isobars of octadecylurea monolayers were measured. This is the first direct observation that the monolayers exhibited a first-order phase transition accompanying discontinuous molecular area contraction with increasing temperature. This may be due to the “fusion” of a hydrogen bonded bulky structure of urea head groups in the monolayers at the water surface.
Lactonization of ω-Hydroxy Esters over Hydrous Zirconium(IV) Oxide
Authors: Kuno Hideyuki , Shibagaki Makoto , Takahashi Kyoko , Honda Ichiro , Matsushita Hajime 
Published: May 2006

Abstract
The lactonization of ω-hydroxy esters was carried out by catalysis with hydrous zirconium(IV) oxide. In the flow reaction system, ω-hydroxy esters were efficiently converted to give the corresponding lactones. In particular, it is noteworthy that heptanolide is obtained in good yield. In addition, it is possible to produce a large quantity of lactones in this catalyst system.
Use of Sodium Nitrite Auxiliary Electrode for Solid Electrolyte Sensor to Detect Nitrogen Oxides
Authors: Yao Sheng , Shimizu Youichi , Miura Norio , Yamazoe Noboru 
Published: May 2006

Abstract
An Na+-conductor (NASICON)-based solid electrolyte device fitted with an NaNO2 auxiliary electrode showed excellent sensing characteristics to NO and NO2 in air. The electromotive force, EMF, followed the Nernst’s equation for 1–800 ppm NO and 0.1–200 ppm NO2 at temperatures of 150–240 °C, the Nernst’s slopes indicating one-electron reduction for both gases.
Stereocontrolled 1,4-Asymmetric Reduction of Cyclic Hemiketals. Synthesis of Both anti and syn-1,4-Diols, and Their Transformations into trans-and cis-2,5-Disubstituted Tetrahydrofurans
Authors: Chikashita Hidenori , Fukushima Takashi , Uemura Hiromitsu , Itoh Kazuyoshi 
Published: May 2006

Abstract
Reduction of dithioacetal-functionalized cyclic hemiketals with LiAlH4 in THF and NaBH4 in ethanol gave the corresponding anti- and syn-1,4-diols with excellent Stereoselectivity, respectively. The anti- and syn-1,4-diols were easily transformed into trans- and cis-2,5-disubstituted tetrahydrofurans with complete stereospecificity by the one-step cyclodehydration with p-TsCl in pyridine, respectively.
One-pot Synthesis of α,α-Dichloroketones from Alkynes Using the N,N-Dimethylformamide/HCl/Potassium Monoperoxysulfate System
Authors: Kim Kye Kwang , Kim Jae Nyoung , Kim Kyoung Mahn , Kim Hyoung Rae , Ryu Eung K 
Published: May 2006

Abstract
The reaction of alkynes with N,N-dimethylformamide (DMF)/HCl/potassium monoperoxysulfate (Oxone, Aldrich) afforded the corresponding α,α-dichloroketones in good yields.
Pulse Radiolysis-Laser Flash Photolysis Studies of Diphenyl Sulfide in Liquid Halocarbons
Authors: Sumiyoshi Takashi , Sakai Hiromichi , Kawasaki Masahiro , Katayama Meiseki 
Published: May 2006

Abstract
The combined pulse radiolysis-laser flash photolysis method has established that the excited state of diphenyl sulfide/chlorine atom complexes readily undergoes intermolecular hydrogen abstraction, while the excited state of diphenyl sulfide/bromine complexes is de-excited without any reactions.
Solid-State Sensor for Sulfur Oxides Based on Stabilized Zirconia and Metal Sulphate
Authors: Yan Yongtie , Shimizu Youichi , Miura Norio , Yamazoe Noboru 
Published: May 2006

Abstract
Electrochemical cells using MgO-stabilized zirconia tube coated with metal sulphates were found to exhibit fairly good sensing properties to 20–200 ppm SO2 in air at 650–800 °C. With various sulphates such as Li2SO4 and Na2SO4, EMF responses to SO2 followed Nernst’s equations for a 2-electron reduction of SO2. With Li2SO4-CaSO4 (6:4 in molar ratio), 90% response- and 90% recovery-times were 12 s and 2.5 min, respectively, for 130 ppm SO2 at 800 °C.
Electrochemical Synthesis of a Tricyclo[5.4.0.01,5]undec-9-en-8,11-dione and Its Conversion to a Triqinane-type Compound
Authors: Maki Shojiro , Kosemura Seiji , Yamamura Shosuke , Kawano Shigeki , Ohba Shigeru 
Published: May 2006

Abstract
9-Methoxy-6β-(3′,4′-dimethoxyphenyl)-2β,5α-dimethyltricyclo[5.4.0.01,5]undec-9-en-8,11-dione has been synthesized by using electrochemical oxidation of the corresponding phenol and then readily converted into a triquinane-type compound in 8 steps.
Enzymatic Preparation of Glycerol-related Chiral Pool Possessing tert-Alkoxy Group
Authors: Watanabe Naoyuki , Sugai Takeshi , Ohta Hiromichi 
Published: May 2006

Abstract
Several kinds of enzymes catalyzed the enantioselective hydrolysis of 2-substituted glycerol 1,3-diacetates to afford optically active monoacetates of 50–73%e.e. under ordinary conditions (phosphate buffer, pH 7, 30 °C). After examining the effect of co-solvents, the hydrolysis of 2-trimethylsilylethoxymethoxyglycerol 1,3-diacetate using lipase LP was improved to afford the monoacetate of 87%e.e. with definite absolute configuration in 50% aqueous DMF at 3 °C.
An Approach to Anthracycline Synthetic Intermediate from Novel Glycerol-related Chiral Pool
Authors: Watanabe Naoyuki , Ohta Hiromichi 
Published: May 2006

Abstract
A key-intermediate of synthetic anthracycline, (+)-(1S,2S)-1,3-dihydroxy-3,3′-O-isopropiridene-3-(hydroxymethyl)-5,8-dimethoxy-1,2,3,4-tetrahydronaphthalene was synthesized from optically active 2-substituted glycerol monoacetate which was prepared via enantioselective enzymatic hydrolysis of a prochiral 2-substituted glycerol derivative.
Lipophilic Cyclic Hexapeptide for Calcium Ion-Selective-Electrode
Authors: Nishino Norikazu , Shiroishi Takanobu , Muraoka Taito , Fujimoto Tsutomu 
Published: May 2006

Abstract
The cyclic hexapeptides containing artificial and lipophilic amino acid, α-aminomyristic acid were designed. The poly(vinyl chloride) (PVC) membrane electrode based on a cyclic hexapeptide exhibited high calcium ion selectivity over sodium and potassium ions.
Direct Catalytic Transformation of Olefins into α-Hydroxy Ketones with Hydrogen Peroxide Catalyzed by Peroxotungstophosphate
Authors: Sakata Yasuyuki , Katayama Yuji , Ishii Yasutaka 
Published: May 2006

Abstract
Aliphatic olefins were directly converted into α-hydroxy ketones with acidic aqueous hydrogen peroxide in the presence of catalytic amount of peroxotungstophosphate (PCWP) under the biphasic system using chloroform as a solvent. The acidic medium was necessary to open the resulting epoxide to vic-diol which was subsequently oxidized to α-hydroxy ketones.
Preparation of Sterically Congested 1,9-Disubstituted Dibenzoselenophenes by Ligand Coupling Reactions and Formation of New Dithia and Diselena Dications on Chemical and Electrochemical Oxidations
Authors: Furukawa Naomichi , Ishikawa Yasuhiro , Kimura Takeshi , Ogawa Satoshi 
Published: May 2006

Abstract
Sterically congested 1,9-bis(phenylthio)dibenzoselenophene (4a) and 1,9-bis(phenylseleno)dibenzoselenophene (4b) were prepared. New dithia dication and diselena dication were generated from 4a and 4b, respectively, in coned sulfuric acid.
Small Difference in Cation Stability in Controlling the Formation of Hydrocarbon Salt or Covalent Hydrocarbon
Authors: Miyabo Atsushi , Takeuchi Ken’ichi , Komatsu Koichi , Kitagawa Toshikazu 
Published: May 2006

Abstract
The reaction of sterically comparable cations, 3-(p-methylphenyl)- and 3-phenyl-1,2-dicyclopropylcyclopropenylium ions with highly stable Kuhn’s anion (C67H39−) gives a hydrocarbon salt and a covalent hydrocarbon, respectively, suggesting that a slight difference in cation stability differentiates the formation of either product.
Total Synthesis of Antibiotic (−)-Oudemansin X Utilizing l-Quebrachitol as a Chiral Pool
Authors: Chida Noritaka , Yamada Ken , Ogawa Seiichiro 
Published: May 2006

Abstract
The stereoselective conversion of naturally occurring optically active cyclitol, l-quebrachitol (2), into antifungal (E)-β-methoxyacrylate, oudemansin X is described. This synthesis fully confirmed the proposed absolute configuration of the antibiotic and revealed the usefulness of 2 as a versatile chiral pool.
Photochemical Behavior of Chlorocarbonylbis(triphenylphosphine)rhodium(I), ClRh(CO)P2 (P = PPh3). Laser Flash Photolysis with Infrared Detection
Authors: Oishi Shigero , Kawashima Takeshi 
Published: May 2006

Abstract
Laser flash photolysis of ClRh(CO)P2 with monitoring infrared region gave definite evidence of photoelimination of CO, rather than P. ClRhP2 generated reacts with the remaining ClRh(CO)P2 to give a transient binuclear rhodium carbonyl, which regenerates ClRh(CO)P2 via the reaction with CO.
A Novel Photo-Induced Patterned Film Formation of Organic Pigments Using Tris(2,2′-bipyridine)ruthenium(II) and Surfactant with Ferrocenyl Moiety
Authors: Mizuno Hironobu , Hoshino Katsuyoshi , Hanna Jun-ichi , Kokado Hiroshi 
Published: May 2006

Abstract
When an acidic aqueous dispersion of an organic pigment containing a ferrocene attached surfactant, a ruthenium(II) photocatalyst, and a sacrificial agent, was illuminated with light of wavelength 450 nm through a photo-masked indium tin oxide (ITO)-coated glass substrate, photo-induced reaction occurred and it deposited pigment layers not onto the illuminated region, but onto the unilluminated area of the substrate.
Synthesis and Characterization of a Calixarene Analog Locked in the Cone Conformation
Authors: Okada Yukihiro , Ishii Fuyuhiko , Kasai Yoshinori , Nishimura Jun 
Published: May 2006

Abstract
A cone-formed calix[4]arene analog (2) was prepared in 89% yield from dihydroxy[2.5]metacyclophane as a building block. A rigidified calixarene analog having ethyl acetate units showed the remarkable selectivity in alkali metal ion extraction. Cyclophane 2 can easily be chiral by changing one, two, or three OH groups to some other achiral functional groups.
Preparation and Electrochemical Properties of the Green Ytterbium(III) and Lutetium(III) Sandwich Complexes of Octabutoxy-Substituted Phthalocyanine
Authors: Takahashi Kazuhiro , Tomita Yasuhiro , Hada Yasuhiro , Tsubota Keiji , Handa Makoto , Kasuga Kuninobu , Sogabe Kunihisa , Tokii Tadashi 
Published: May 2006

Abstract
The Yb(III) and Lu(III) sandwich complexes of 2,3,9,10,16,17,23,24-octabutoxyphthalocyanine (H2obPc) were prepared and characterized. Those electrochemical properties in CH2Cl2 were studied by means of cyclic voltammetry and absorption spectra in 320–1600 nm region monitored during controlled-potential electrolysis.
An Expedient Synthesis of α,β-Unsaturated Ketones Using Nitroalkenes and Sulfones
Authors: Awen Bahlul Z , Miyashita Masaaki , Shiratani Tomonori , Yoshikoshi Akira , Irie Hiroshi 
Published: May 2006

Abstract
A facile synthesis of various substituted α,β-unsaturated ketones utilizing nitroalkenes and sulfones are described, in which conjugate addition of sulfonyl carbanions to nitroalkenes, ozonolysis or acid treatment of the resulting lithium nitronates, and subsequent elimination of sulfinic acid from keto sulfones by DBU are involved.
Novel Synthesis of Indoles via Palladium-Catalyzed Reductive N-Heterocyclization of o-Nitrostyrene Derivatives
Authors: Akazome Motohiro , Kondo Teruyuki , Watanabe Yoshihisa 
Published: May 2006

Abstract
Indole derivatives were readily prepared from the reductive N-heterocyclization of o-nitrostyrene derivatives in the presence of a catalytic amount of PdCl2(PPh3)2–SnCl2 under carbon monoxide pressure (20 kg/cm2) at 100 °C for 16 h. With o-nitrostilbene, 2-phenylindole was obtained in 75% yield.
Partial Oxidation of Toluene to Benzaldehyde and Benzyl Alcohol by Applying an H2-O2 Fuel Cell System
Authors: Otsuka Kiyoshi , Ishizuka Kiyokazu , Yamanaka Ichiro 
Published: May 2006

Abstract
The cathode of carbon whisker was active for the oxidation of toluene into benzaldehyde and benzyl alcohol during the H2-O2 fuel cell reaction under short circuit conditions. Synergism of carbon whisker and active carbon was observed. The increase in the concentration of H3PO4 used as an electrolyte improved the selectivity and the oxidation efficiency remarkably.
Biotransformation of Squalene to Optically Active Methylsuccinic Acid and 3-Methyladipic Acid
Authors: Tsubokura Akira , Yoneda Hisashi , Hirayama Takayuki , Kiyota Takashi 
Published: May 2006

Abstract
Squalene was converted to a mixture of (R)-(+)-methylsuccinic acid and (S)-(−)-3-methyladipic acid by Saccharomycopsis lipolytica SQL349 isolated from soil. The enantiomeric excess of each compound was determined to be 99%.
A Versatile Macrocyclic [12]aneN3 for Interconversion of Tetrahedral and Trigonal Bipyramidal Zinc(II) Complexes. Relevance to Four- →← Five-Coordinate Geometries of Zinc(II) in Carbonic Anhydrase
Authors: Kimura Eiichi , Koike Tohru , Shionoya Mitsuhiko , Shiro Motoo 
Published: May 2006

Abstract
X-Ray crystal study of [12]aneN3-ZnII(NCS)2 has revealed a 5-coordinate, trigonal bipyramidal structure with an equatorial ZnII-NCS− bond closer and linear, and an apical ZnII-NCS− bond longer and bent, and the new configuration of [12]aneN3, which is reversed from those known for 4-coordinate, tetrahedral ZnII complexes.
Energy Component Analysis of the Pseudo Jahn-Teller Effect in Pentalene and Heptalene
Authors: Toyota Azumao , Kataoka Masahiro , Koseki Shiro 
Published: May 2006

Abstract
An energy component analysis of the pseudo Jahn-Teller effect from D2h to C2h within the PPP-type HF approximation reveals that the energetic stability for heptalene arises essentially from a lowering of the electron-nuclear attraction energy, while that for pentalene arises entirely from a decrease in the interelectronic repulsion energy.
Catalytic Decomposition of CFC-112 and CFC-113 in the Presence of Ethanol
Authors: Miyatani Daisaku , Shinoda Kiyonori , Nakamura Tadashi , Ohta Minoru , Yasuda Kensei 
Published: May 2006

Abstract
Iron (III) chloride supported on activated charcoal was extremely effective for decomposition of CFC-112 and CFC-113 into CO and CO2 in the presence of ethanol at the the low temperature.
Double-Sided Porphyrinatoiron(II) Bearing Covalently Bound Imidazole. An Efficient Oxygen-Carrier Molecule Composed by 8 Ester Bonds
Authors: Komatsu Teruyuki , Arai Kenji , Nishide Hiroyuki , Tsuchida Eishun 
Published: May 2006

Abstract
Double-sided porphyrinatoiron(II) bearing covalently bound axial imidazole, 5,10,15-tris(2,6-bis(3,3-dimethylbutyryloxy)phenyl)-20-(2-(3,3-dimethylbutyryloxy)-6-(5-imidazolylvaleroyloxy)phenyl)porphyrinatoiron (1b), was synthesized: The substituents of 1b are bound with the porphyrin only through ester bonds. 1b formed a stable O2 adduct reversibly in toluene at 25 °C or with a lipid surfactant under physiological conditions.
An Investigation of the Inherent Chiral Induction Ability of Axially Chiral 1,1′-Binaphthalene Framework in the Prelog’s Atrolactic Acid Synthesis
Authors: Tamai Yasufumi , Nakano Tomoyuki , Miyano Sotaro 
Published: May 2006

Abstract
In the Prelog’s atrolactic acid synthesis using 2′-substituted 1,1′-binaphthalen-2-ols as the chiral auxiliaries, the sense of the diastereoselection could not solely be determined by the helicity of the 1,1′-binaphthalene framework. A revised steric model is proposed to explain the selectivity.
Nitrene-promoted α-Alkoxylation of Amides with Silyl Ethers
Authors: Mitani Michiharu , Watanabe Keiko , Tachizawa Osamu , Koyama Kikuhiko 
Published: May 2006

Abstract
Thermolysis of a solution of amides, silyl ethers, and ethyl azidoformate caused the introduction of several alkoxy groups into the positions adjacent to the amide nitrogen.
Hydrogenation of Solid State Carbonates
Authors: Tsuneto Akira , Kudo Akihiko , Saito Nobuhiro , Sakata Tadayoshi 
Published: May 2006

Abstract
NiCO3 and CoCO3 react with hydrogen to produce methane at 200–250 °C without any additional catalysts, and some alkali or alkaline-earth metal carbonates are also hydrogenated at 300–400 °C to form methane using transition metal powders as a catalyst.
The Stability and Reactivity of Dihydroxy Bis(trimethylphosphine)platinum(II)
Authors: Miyamoto T Ken , Suzuki Yoshitsugu , Ichida Hikaru 
Published: May 2006

Abstract
A dihydroxy platinum(II) compound, cis-[Pt(PMe3)2(OH)2]·nH2O (Me = methyl, n = 2–3; 1) has been isolated. The presence of several water molecules is required for the stabilization of the complex. The solution equilibria of 1 with some equivalents of nitric acid has been observed by 31P NMR spectroscopy, as well as the reaction of 1 with aqueous hydrogen peroxide. Leaving 1 in air gives carbonatoplatinum(II), cis-[Pt(PMe3)2(CO3)]·2H2O. The crystal structure determination has revealed that the carbonate anion forms a 4-membered chelate with a platinum atom.
Syntheses and Molecular Recognition Abilities of 6-O-, 2-O-, and 3-O-Dansyl-γ-Cyclodextrins
Authors: Wang Yong , Ikeda Tsukasa , Ueno Akihiko , Toda Fujio 
Published: May 2006

Abstract
6-O-, 2-O-, and 3-O-Dansyl-γ-CD (γ-1, γ-2, and γ-3) were synthesized as fluorescent sensors by the reaction of γ-CD with dansyl chloride under different conditions. They showed remarkably different molecular recognition abilities for various organic compounds. Molecular size and molecular structure of guests are the important factors which govern the sensitivity in these sensor systems.
Molecular Structure of Phenyl[tris(trimethylsilyl)]ethylene Dilithium Complex. An Orthogonal Dianion
Authors: Sekiguchi Akira , Nakanishi Tetsuo , Kabuto Chizuko , Sakurai Hideki 
Published: May 2006

Abstract
Phenyl[tris(trimethylsilyl)]ethylene bis(lithium dimethoxyethane) was prepared as black crystals. The molecular structure determined by the X-ray diffraction method shows several interesting features. One of the lithium atoms is located near the central two carbon atoms, while the other is above the benzene ring and the central C–C bond is twisted by 92°.
Fluorescein Chemiluminescence-Delay Method for the Determination of Ultratrace Amounts of Copper(II)
Authors: Kamidate Tamio , Kuniya Isao , Segawa Tadashi , Watanabe Hiroto 
Published: May 2006

Abstract
A delayed chemiluminescence(CL) was observed in the copper(II)-catalyzed oxidation of cysteamine with oxygen in the presence of fluorescein(FL) and horseradish peroxidase. The delayed CL reaction of FL was applied to the determination of Cu(II). The delay time was correlated linearly with Cu(II) concentration over the range from 5.0 × 10−9 M to 1.0 × 10−6 M.
Carbon-Carbon Bond Formation in Helical Nickel(II) Complex, cis-Bis[2-N-(phenylmethylideneamine)benzenethiolato]nickel(II)
Authors: Kawamoto Tatsuya , Kushi Yoshihiko 
Published: May 2006

Abstract
The reaction of 2-phenylbenzothiazoline with nickel(II) acetate tetrahydrate leads to cis-bis[2-N-(phenylmethylideneamine)benzenethiolato]nickel(II) (1) and two ligands in 1 are joined through a C-C bond to form a complex having two chiral centers (2). The X-ray structural analysis of 2 establishes the bond patterns of the delocalized ligand.