bluuebunny/crossref_metadata_2025_split huggingface dataset:
Rate Enhancing Effect of Carbon Dioxide in the Reaction of Acetonitrile with Methanol to Acrylonitrile over Magnesium Oxide Catalyst
Authors: Lin Yi Wen , Ishii Makoto , Ueda Wataru , Morikawa Yutaka 
Published: March 2006

Abstract
Carbon dioxide greatly enhanced the formation rate of acrylonitrile in the gas-phase reaction of acetonitrile with methanol over magnesium oxide catalyst. The reaction in the presence of carbon dioxide was accompanied by the reaction of methanol with carbon dioxide to give carbon monoxide and water. An adsorbed carbon dioxide species on the basic surface of magnesium oxide seems to afford an active methanol-derived species for the reaction with acetonitrile.
Preparation of Polyphenol Particles by Dispersion Polymerization Using Enzyme as Catalyst
Authors: Uyama Hiroshi , Kurioka Hideharu , Kobayashi Shiro 
Published: March 2006

Abstract
Peroxidase-catalyzed dispersion polymerization of phenols has been performed in a mixture of 1,4-dioxane and phosphate buffer using a water-soluble polymer as stabilizer to produce relatively monodisperse polyphenol particles in the sub-micron range.
Syntheses of Novel Structurally Constrained (S)-Histidyl-(S)-Histidine Derivatives and Their Copper(II) Complexes
Authors: Kojima Yoshitane , Watanabe Masaaki , Seki Yoshio , Yamato Kazuhiro , Miyake Hiroyuki 
Published: March 2006

Abstract
A novel chelating reagent, N,N′-ethylene-bridged (S)-histidyl-(S)-histidine methyl ester, has been synthesized by a one-step reaction of a Schiff-base of (S)-histidine methyl ester with aqueous glyoxal and sodium cyanoborohydride. Cu(II) complexes of its derivatives also have been synthesized and characterized.
A New Mode of Fluoride-Ion Exchange Reactions between Tetracoordinate Silane and Pentacoordinate Fluorosilicate
Authors: Kira Mitsuo , Hoshi Takashi , Sakurai Hideki 
Published: March 2006

Abstract
Intramolecular fluoride-ion donor-acceptor systems such as [p- and m-(difluorophenylsilyl)phenyl]trifluorophenylsilicates showed a new mode of fluoride-ion exchange reactions in solution, for which a concerted bimolecular exchange mechanism through cyclophane-like transition states was proposed on the basis of a dynamic 13C NMR analysis of rates and activation parameters.
Alkylation of Phosphate Group of Nucleotides via Tributylstannyl Phosphate Derivatives
Authors: Ayukawa Hiroshi , Ohuchi Shokichi , Ishikawa Masahide , Hata Tsujiaki 
Published: March 2006

Abstract
Alkylation reaction of phosphates via tributylstannyl salt was applied to dinucleotide derivatives. Some alkyl groups were successfully introduced into the internucleotidic phosphate by use of alkyl bromides in the presence of tetraethylammonium bromide. In case of thymidylyl(3′-5′)thymidine, the phosphate moiety was alkylated selectively.
The Formation of Higher Linear Phosphates during Degradation Reactions of Di-, Tri- and Tetraphosphates in the Presence of Aluminum(III) Ion
Authors: Kura Genichiro , Ninomiya Junko 
Published: March 2006

Abstract
Linear phosphates which contain one more P atom in their molecules than the parent phosphates were found in the degradation products of the parent di-, tri- and tetraphosphate under the presence of aluminum(III) ions. These side reactions occurred only during the cleavage reactions of the linear polyphosphates.
Mg-Promoted Reductive Cross Coupling of Carbonyl Compounds with Trimethylsilyl Chloride
Authors: Ishino Yoshio , Maekawa Hirofumi , Takeuchi Hiroshi , Sukata Kazuaki , Nishiguchi Ikuzo 
Published: March 2006

Abstract
Mg-promoted cross-coupling of aromatic carbonyl compounds with trimethylsilyl chloride (TMSCl) in DMF at room temperature brought about reductive carbon-silicon bond formation to give the corresponding α-trimethylsilylalkyl trimethylsilyl ethers selectively in good yields. The reaction may be initiated through electron transfer from Mg metal to the carbonyl compounds.
Synthesis and Lithium Ion-Selectivity of 2-Phenylcyclohexano-and 2,3-Diphenylcyclohexano-14-crown-4 Derivatives
Authors: Kobiro Kazuya , Kaji Mayumi , Tsuzuki Sachiko , Tobe Yoshito , Tuchiya Yuko , Naemura Koichiro , Suzuki Koji 
Published: March 2006

Abstract
Cis- and trans-2-phenylcyclohexano-14-crown-4 and cis- and trans-2,3-diphenylcyclohexano-14-crown-4 were prepared and their ion selectivity was determined by means of extraction of alkali metal picrates, stability constants, and ion-selective electrodes. Cis diphenyl derivative exhibits the highest lithium ion-selectivity of the four ionophores examined, which is as high as that of decalino-14-crown-4, one of the best Li+-selective ionophores.
Rhodium and Ruthenium Complexes with Optically Active Chelate Cyclopentadienyl-Phosphine Bidentate Ligands
Authors: Kataoka Yasutaka , Saito Yoshinori , Nagata Koji , Kitamura Kenichi , Shibahara Atsushi , Tani Kazuhide 
Published: March 2006

Abstract
The first optically active cyclopentadienyl-phosphine bidentate ligands ([Cp-P]H ligands) in which a diphenylphosphino group and a cyclopentadienyl or an indenyl group are connected by an L-threitol derivative or an (S,S)-trans-1,2-dimethylenecyclo-pentane group have been prepared. The rhodium and ruthenium complexes of their anions have been prepared and characterized.
ESR of the Trianion and Anion Radicals of Benzo[g][1,2,5]thiadiazolo[3,4-b]-quinoxaline-5,10-dione and Its Selenium Analogue
Authors: Hirayama Masatoshi , Terasaka Toshitaka , Itasaka Manabu , Suzuki Takanori , Yamashita Yoshiro , Miyashi Tsutomu 
Published: March 2006

Abstract
The anion and trianion radicals of title compounds were generated by electrolysis in acetonitrile at room temperature and their ESR spectra were measured, which can be identified on the basis of π-MO calculations of hfsc’s.
Preparation of Transparent TiO2 Thin Film Photocatalyst and Its Photocatalytic Activity
Authors: Negishi Nobuaki , Iyoda Tomokazu , Hashimoto Kazuhito , Fujishima Akira 
Published: March 2006

Abstract
Transparent TiO2 thin films with high photocatalytic activity were prepared on glass substrates via the sol-gel method from tetraisopropyl titanium ethanol solution containing polyethylene glycol and diethylene glycol. Transparency of these TiO2 thin films was 80% in the visible region. Photocatalytic activity of the TiO2 thin films was studied using the decomposition of gaseous acetaldehyde. We found that the quantum yield with those films was similar to that with one of the most photoactive commercial TiO2 powders, Degussa P-25.
Design and Synthesis of Artificial Siderophores: Lysine-based Triscatecholate Ligands as a Model for Enterobactin
Authors: Akiyama Masayasu , Ikeda Tsuyoshi 
Published: March 2006

Abstract
An enantiomeric pair of triscatecholate ligands have been prepared as a model for siderophore enterobactin, using protected derivatives of l- or d-lysine, 1,2-diaminoethane and 2,3-dihydroxybenzoic acid. The ligands have greater chemical stability and higher water solubility than enterobactin, and form chiral complexes with iron(III), as enterobactin does.
Cleavage of Co-C Bond in a Cobaltathiirane by Hydrogen Chloride and Reformation of Co-C Bond by Tetrabutylammonium Fluoride
Authors: Kajitani Masatsugu , Kawakita Fumiko , Chikuma Eri , Sakurada Masami , Akiyama Takeo , Sugimori Akira 
Published: March 2006

Abstract
The cobaltadithiolene complex, (η5-cyclopentadienyl)(1-methoxycarbonyl-1,2-ethenedithiolato)cobalt(III) (1a) reacts with trimethylsilyldiazomethane by formal addition of Me3SiCH to the Co-S bond to afford a cobaltathiirane (2a). Addition of hydrogen chloride to 2a causes the cleavage of the Co-C bond to give chloro(η5-cyclopentadienyl)[[1-(trimethylsilyl)methylthio-κS]-1-methoxycarbonylethene-2-thiolato-κS]cobalt(III)(4a). By the reaction with tetrabutylammonium fluoride in THF, 4a undergoes loss of Cl and Me3Si to afford (η5-cyclopentadienyl)[(methylene-κC-thio-κS)-1-methoxycarbonylethene-2-thiolato-κS]cobalt(III)(2c).
Selective Cyclotrimerization of Acetylenes via Tantalum-Alkyne Complexes
Authors: Takai Kazuhiko , Yamada Masashi , Utimoto Kiitiro 
Published: March 2006

Abstract
Tantalum-alkyne complexes prepared from internal acetylenes and low-valent tantalum (TaCl5 and Zn) in DME and benzene react with terminal diynes in the presence of THF and pyridine to give tetrasubstituted benzene derivatives in good to excellent yields.
Relative Configuration of a Marine Toxin Polycavernoside-A
Authors: Fujiwara Kenshu , Amano Seiji , Murai Akio 
Published: March 2006

Abstract
Combination of the sugar and tetrahydropyran parts of polycavernoside-A, which has been isolated as one of toxic principles from the red alga Polycavernosa tsudai, revealed the whole relative configuration of the compound from the spectral data.
Quadrupolar [14](meta-para)2Heterophanes and [14]metaHeterophanes Containing Stable 3,5-Bis[1-methyl-4(3)-pyridiniomethyl]-1,2,4-triazolate Building Block
Authors: Alcalde Ermitas , Gisbert Maria , Pérez-García Lluïsa 
Published: March 2006

Abstract
Access to novel quadrupolar [14] (meta-para)2azolophane with a 3,5-bis[1-methyl-4-pyridiniomethyl]-1,2,4-triazolate subunit reveals that the structural features conferred by the heterophane architecture lead to molecules that are stable to oxidation, in contrast with their building block. The stability of [14]metaazolophanes is consistent with the betainic subunits.
Synthesis, Structure, and Magnetic Properties of Dinuclear Copper(II) Complexes with Novel Triple Carboxylato-Bridging Linkages
Authors: Matsushima Hideaki , Koikawa Masayuki , Nakashima Michio , Tokii Tadashi 
Published: March 2006

Abstract
Novel triply carboxylato-bridged dinuclear copper(II) complexes, [Cu2(Ph2CHCOO)3(L)2]BF4, where L is bpy or phen, have been prepared. X-Ray structural analyses have revealed that each complex consists of a dicopper(II) core with unusual bridging geometries (syn-syn and μ2,η1 carboxylato-modes) reflected the versatility of carboxylates as bridging ligands. Magnetic susceptibility measurements for the present complexes show a weak antiferromagnetic coupling.
A Facile Preparation of Cesium Tellurocarboxylates. The First X-Ray Structural Analysis of a Tellurocarboxylic Acid Alkali Metal Salt
Authors: Kawahara Yasuyuki , Kato Shinzi , Kanda Takahiro , Murai Toshiaki 
Published: March 2006

Abstract
Crystalline cesium tellurocarboxylates have been isolated from the reaction of O-trimethylsilyl tellurocarboxylates with cesium fluoride and characterized by X-ray crystallographic analysis which showed a C–Te single bond (2.107 Å) and the possibility of localization of the negative charge on the Te atom.
Oxidative Esterification of Primary Alcohols by NaBrO3/NaHSO3 Reagent in Aqueous Medium
Authors: Takase Kiyoshi , Masuda Haruyoshi , Kai Osamu , Nishiyama Yutaka , Sakaguchi Satoshi , Ishii Yasutaka 
Published: March 2006

Abstract
NaBrO3 combined with NaHSO3 was found to be an efficent reagent for the oxidative esterification of primary alcohols. Thus, a variety of esters was prepared from primary alcohols, aldehydes, and acetals in aqueous medium under mild conditions. Treatment of α,ω-diols with NaBrO3/NaHSO3 reagent afforded the corresponding lactones and/or dicarboxylic acids in fair yields.
Implicit Role of Hydrogen Peroxide on Phytoalexin Production in Higher Plants
Authors: Murai Akio , Sato Kaoru , Hasegawa Toshio 
Published: March 2006

Abstract
Sweet potato, kidney bean, and sugar beet, when infected with Fusarium roseum, Fusarium solani, and Rhizoctonia solani, respectively, generated H2O2 which then elicited accumulation of the phytoalexins in the respective cases. The three intact plant tissues, only when treated with H2O2, induced phytoalexin production, respectively.
Important Role of Tetrahydrofuran Ring in Activation of Hydrogen Peroxide in the Presence of Binuclear Iron(III) Complexes with Linear μ-Oxo Bridge
Authors: Nishida Yuzo , Okuno Takashi , Ito Sayo , Harada Akihiko , Ohba Shigeru , Matsushima Hideaki , Tokii Tadashi 
Published: March 2006

Abstract
Binuclear μ-monooxo bridged iron(III) complex with tripodal-like ligand containing tetrahydrofuran ring exhibits much higher activity for alkane hydroxylation reaction in the presence of hydrogen peroxide than that of pyridine analogue; origin for high activity of the former complex was developed.
Effect of Polyaniline-coated Surface on the Formation of Multicellular Spheroids of Hepatocytes
Authors: Kawase Masaya , Michibayashi Nobuyasu , Yoshimura Yuriko , Yamada Chikaomi , Sumiyoshi Nobuaki , Yagi Kiyohito , Mizoguchi Tadashi 
Published: March 2006

Abstract
Polyaniline was formed on indium tin oxide coated glass by electrochemical method. On the polyaniline surface, hepatocytes from adult rat rapidly formed multicellular spheroids for 2 days, and showed high amount production of albumin. It is shown that polyaniline is suitable for hepatocytes culture.
Photochromism of Single Crystalline Diarylethenes
Authors: Irie Masahiro , Uchida Kingo , Eriguchi Takeshi , Tsuzuki Hirohisa 
Published: March 2006

Abstract
1,2-Bis(2,4-dimethy-3-thienyl)perfluorocyclopentene was found to undergo a reversible photochromic reaction in a single crystalline phase with rotation of the thiophene rings. Both the open-ring colorless and the photogenerated red isomers were thermally stable even at 100 °C. Coloration/decoloration cycles could be repeated more than 100 times without destruction of the crystal shape. Regular alignment of the photogenerated colored isomers in the crystal was evidenced by the absorption measurement under linearly polarized light.
Solubilization of a Brown Coal in a Solvent Mixture of Methanol and a Non-polar Solvent at Room Temperature
Authors: Miura Kouichi , Mae Kazuhiro , Maki Taisuke , Araki Jun 
Published: March 2006

Abstract
A new method was developed for solubilizing a brown coal in a conventionally used solvent at room temperature. The coal pretreated with hydrogen peroxide in liquid phase at 60 °C for 2 h was extracted by solvent mixtures of methanol and a non-polar solvent by the conventional method. In the solvent consisting of methanol and 1-methyl-naphthalene (0.54:0.46 volumetric ratio), surprisingly, 84 wt% of the pretreated coal were extracted.
Microelectrode-Detected Electron Spin Resonance (MEDESR) Signals of Free Radicals in Electrolyte Solutions
Authors: Yokoyama Hidekatsu , Satoh Toshiyuki , Ohya-Nishiguchi Hiroaki , Kamada Hitoshi , Kasai Nahoko , Matsue Tomokazu 
Published: March 2006

Abstract
The ESR spectra of stable free radical in solution have first been detected through potential change between two electrodes inserted in the solution. The working electrode (φ 50 μm) was biased by a constant current source under microwave irradiation and modulated magnetic field. The AC component of the potential on resonance was preamplified and detected by a lock-in amplifier. The sensitivity of this method, 5 × 106 spins/G, is 103 higher than those of conventional ESR spectrometers.
Molecular Imprinting of Theophylline in Acrylonitrile-acrylic Acid Copolymer Membrane
Authors: Kobayashi Takaomi , Wang Hong Ying , Fujii Nobuyuki 
Published: March 2006

Abstract
Molecular size of Theophylline was imprinted in ultrafiltration membrane of poly(acrylonitrile-co-acrylic acid), when the membrane was prepared by phase inversion method. Evidence was presented by the permeation experiments that the Theophylline solute binds more strongly to the imprinted membrane.
Synthesis and Photochemical Properties of the Orthogonal Porphyrin Triad Composed of Free-Base and Phosphorus(V) Porphyrins
Authors: Susumu Kimihiro , Segawa Hiroshi , Shimidzu Takeo 
Published: March 2006

Abstract
A novel triad molecule composed of three porphyrins was synthesized by the use of the axial substitution of phosphorus(V) porphyrin. Photochemical properties of the triad suggest that the photoinduced electron transfer was accomplished.
Decomposition of Methane over Ni/SiO2 Catalysts with Membrane Reactor for the Production of Hydrogen
Authors: Ishihara Tatsumi , Miyashita Yumi , Iseda Hiroshi , Takita Yusaku 
Published: March 2006

Abstract
Decomposition of CH4 to C and H2 on Ni/SiO2 catalyst was investigated with membrane reactor consisting of 90Pd10Ag alloy tube for the production of H2. Application of membrane reactor was effective for increasing the yield of H2 and consequently, CH4 conversion far exceeded the equilibrium conversion of closed system by using the membrane reactor.
Effect of the Addition of Nitrogen Dioxide on the Gas-Phase Partial Oxidation of Methane with Oxygen under Normal Pressures
Authors: Han Li-Biao , Tsubota Susumu , Haruta Masatake 
Published: March 2006

Abstract
The addition of NO2 to the gas-phase reaction of CH4 with O2 conducted under normal pressures at temperatures of 400∼460 °C enhances the partial oxidation of methane with improved selectivities to organic products.
Syntheses and Crystal Structures of Novel Antimony-Containing Cyclic Polysulfides
Authors: Tokitoh Norihiro , Arai Yoshimitsu , Harada Jun , Okazaki Renji 
Published: March 2006

Abstract
The reaction of a dihydrostibine bearing a 2,4,6-tris[bis(trimethylsilyl)methyl]phenyl (Tbt) group, TbtSbH2, with elemental sulfur resulted in the formation of two kinds of novel Sb-containing cyclic polysulfides, TbtSbS5 and TbtSbS7, together with another type of two cyclic polysulfides having two TbtSb units, 1,3,4,5,2,6-tetrathiadistibane and 1,3,5,2,4-trithiadistibolane derivatives.
Super-Secondary Structure with Amphiphilic β-Strands Probed by Pyrenylalanine
Authors: Ono Shin , Kameda Naoyoshi , Yoshimura Toshiaki , Shimasaki Choichiro , Tsukurimichi Eiichi , Mihara Hisakazu , Nishino Norikazu 
Published: March 2006

Abstract
A peptide composed of two amphiphilic β-strands was designed and synthesized. The circular dichroism and fluorescence spectra of l-1-pyrenylalanine introduced in each segment probed that a super-secondary structure with two β-strands was formed with a left-handed twist and transformed to α-helices by the addition of trifluoroethanol.
Structure and Vibrational Spectra of Trinuclear Metal Cluster Complexes. A Question of Symmetry
Authors: Ohto Akihiro , Tokiwa-Yamamoto Ayako , Abe Masaaki , Ito Tasuku , Sasaki Yoichi , Umakoshi Keisuke , Cannon Roderick D 
Published: March 2006

Abstract
Symmetry of the oxo-centered tri-ruthenium(III) complexes, [Ru3(O)(OOCR)6(L)3]+ (R = CH3, C6H5; L = pyridine, H2O), is discussed on the basis of the shapes of υas(OCO) bands in infra-red spectra, using comparisons between these complexes and related tri-rhodium(III) and mixed-metal Ru(III)2M complexes. It is suggested that the tri-ruthenium(III) complexes have non-threefold symmetry.
Unusual Solvent Effect on Absorption Spectra of Nonplanar Dodecaphenylporphyrin Caused by Hydrogen-Bonding Interactions
Authors: Takeda Jun , Sato Mitsuo 
Published: March 2006

Abstract
UV-vis absorption spectra of nonplanar dodecaphenylporphyrin H2DPP show a strong solvent dependence caused by the hydrogen-bonding interactions of pyrrole NH protons and pyrrolenine nitrogen lone pairs with solvent molecules.
In Situ Observation of Domain Structure in Monolayers of Tetraphenylporphyrin Derivatives Containing Four Fluorocarbon Chains by Brewster Angle Microscope
Authors: Liang Wei , Nakahara Hiroo 
Published: March 2006

Abstract
The morphologies in monolayers of tetraphenylporphyrin derivatives with four fluorocarbon chains have been observed in situ on the water surface by a Brewster angle microscope (BAM). It has been suggested that the homogeneity of the monolayers depends upon the chain length of substituents for the porphyrin derivatives and in the case of the shorter chain the nucleation and the process of growing crystallines in the monolayers can be clearly observed at zero surface pressure or on compression.
Intramolecular T2-Energy Transfer from Anthryl Group Studied by Stepwise Two-Color Two-Photon Excitation: A Cis to Trans Isomerization and a Valence Isomerization
Authors: Okada Keiji , Sakai Hidekazu , Oda Masaji , Kikuchi Koichi 
Published: March 2006

Abstract
Intramolecular energy transfer from the second triplet of anthracene moiety is exemplified in the cis to trans isomerization of methyl maleate and the valence isomerization of norbornadiene to quadricyclane by stepwise two-color two-photon excitation method.
Acid-isomerization of 3,4-Dimethyl-4-homoadamantyl Cation to 3-Ethyl-5-methyl-1-adamantyl Cation. A Unique Method for Construction of an Adamantyl Framework Having Two Alkyl Groups on the Bridgehead Positions
Authors: Okazaki Takao , Kitagawa Toshikazu , Takeuchi Ken’ichi 
Published: March 2006

Abstract
Ionization of 3,4-dimethyl-4-homoadamantanol with FSO3H/SbF5 in SO2ClF irreversibly afforded the 3-ethyl-5-methyl-1-adamantyl cation (9) at −30 °C, which was directly observed by 13C NMR. Trapping of 9 with methanol gave the corresponding methyl ether in 71% yield, suggesting that the acid-isomerization of 3,4-dialkyl-4-homoadamantanols may be conveniently used for preparation of 1,3-dialkyladamantane derivatives.
A Remarkable Difference in the Reactivity between cis- and trans-Silylplatinum Complexes toword Insertion of Acetylene
Authors: Hikida Toshihiko , Onitsuka Kiyotaka , Sonogashira Kenkichi , Hayashi Tamio , Ozawa Fumiyuki 
Published: March 2006

Abstract
Reaction of cis-PtMe(SiPh3)(PMe2Ph)2 (1) with phenylacetylene in benzene readily proceeds at room temperature to give the acetylene-insertion product cis-PtMe{C(Ph)=CH(SiPh3)}(PMe2Ph)2, while trans-PtMe(SiPh3)(PMe2Ph)2 (2), which is the geometrical isomer of 1, is inactive toward acetylene-insertion. A mechanism of insertion involving a five-coordinate intermediate is proposed to account for the marked difference in the reactivity between the cis and trans isomers.
First Conversion of a Square-planar [Ni(aet)2] to an Octahedral [Ni(aet)2L] by Forming S-Bridged Structure with Pt(II) (aet = 2-Aminoethanethiolate; L = (H2O)2 or 2,2′-Bipyridine)
Authors: Konno Takumi , Yoshinari Yukie , Okamoto Ken-ichi 
Published: March 2006

Abstract
The reaction of [Ni(aet)2] (aet = 2-aminoethanethiolate) with [PtCl2(bpy)] (bpy = 2,2′-bipyridine) in water led to the geometrical conversion of NiII from square-planar to octahedral, giving a novel S-bridged PtIINiII complex, [Pt(bpy){Ni(aet)2(H2O)2}]2+ (1). 1 readily reacted with bpy in water to produce [Pt(bpy){Ni(aet)2(bpy)}]2+ (2), of which structure was determined by X-ray crystallography.
Photochemical Polymerization of Oligothiophenes
Authors: Fujitsuka Mamoru , Sato Tadatake , Segawa Hiroshi , Shimidzu Takeo 
Published: March 2006

Abstract
Photochemical polymerization of oligothiophenes was investigated from steady-state and laser-flash photolysis. Photo-irradiation to bithiophene or terthiophene solutions containing p-dinitrobenzene or CCl4 gave their α-linked polymers. It was concluded that the coupling reaction of oligothienyl radicals formed through the photoinduced electron transfer from the excited oligothiophenes to the electron acceptor resulted in a formation of polymeric products.
Buffer Effects on the Ring Opening of Cyclic Sulfinate Esters as Evidence for the Hypervalent Intermediate
Authors: Okuyama Tadashi 
Published: March 2006

Abstract
Ring opening of dibenzo-1,2-oxathiin 2-oxide (1a) and 3,4-dihydro-1,2-benzoxathiin 2-oxide (1b) is accelerated by buffer bases while that of 3H-2,1-benzoxathiole 1-oxide (1d) is essentially independent of buffer concentrations in tertiary amine buffers or decelerated in some buffers. These results are taken as evidence for the hypervalent intermediate of this reaction.
Novel Hg2+-Ionophores Based on N-Hydroxylamide Derivatives as a Sensory Molecule for an Ion-Selective Electrode
Authors: Siswanta Dwi , Kin Masanori , Hisamoto Hideaki , Suzuki Koji 
Published: March 2006

Abstract
Several N-hydroxylamide derivatives were developed, exhibiting high selectivity for Hg2+, which are useful as sensory molecules for a potentiometric ion sensor.