bluuebunny/crossref_metadata_2025_split huggingface dataset:
Electronic Structures of Purine Bases Studied by Electrochemical-ESR Techniques. Spin Distribution in Purine Anion Radical
Authors: Ohya-Nishiguchi Hiroaki , Shimizu Yasunori , Hirota Noboru , Watanabe Kohji 
Published: July 2006

Abstract
We have investigated the ESR spectrum of anion radical of purine generated electrochemically using a helical electrode cell for low-temperature ESR measurements. The assignment of the hfcc was made with the aid of partial deuteration and MO calculations. The most notable observation is that about 45% of the spin density is localized at position 6. This correlates well with the preferential hydrogenation at this position. The McLachlan method reproduces the observed spin distribution well with βN9C⁄βCC=1.0 which indicates that the bonding between the nitrogen at 9 and carbons at 4 and 8 have large double bond characters. The INDO-MO calculations based on the two molecular geometries for 9H-purine also agree well with the experimental data. Finally the effect of tautomerism of purine on the spectrum is discussed.
Organonickel(II) Complexes Containing Carbon-bonded Heterocycles as a Ligand
Authors: Isobe Kiyoshi , Nakamura Yukio , Kawaguchi Shinichi 
Published: July 2006

Abstract
Oxidative addition reactions of 2- and 3-chloropyridines and of 2-chloropyrazine to tetrakis(triphenylphosphine)nickel(0) occurred in toluene at ambient temperature to afford dinuclear nickel(II) complexes containing carbon-bonded heterocycles as a ligand. They are quite stable and the bridging chloride was readily substituted by other halides and pseudohalides preserving the dinuclear structure. 8-Chloroquinoline yielded a mononuclear complex as an exception. These novel organonickel(II) complexes were characterized by analytical and molecular weight data together with IR, 1H NMR, and 13C NMR spectra. Di-μ-chloro-bis(2-pyridyl)bis(triphenylphosphine)dinickel(II) was found to be an excellent catalyst for selective cross coupling of 2-chloropyridine with methylmagnesium bromide.
Vibrational Distribution of HF Produced by Mercury Photosensitized Decomposition of Fluoroethylenes
Authors: Watanabe Hajime , Horiguchi Hiroyuki , Tsuchiya Soji 
Published: July 2006

Abstract
Distributions of vibrationally excited HF produced by Hg-photosensitized reactions of fluoroethylenes are determined by means of the IR emission measurement of HF fundamentals. The distributions are almost of Boltzmann type with temperatures of 11400, 13700, 7200, 5700, 5700, and 2200 K for respective parent molecules of CH2=CHF, CH3CF=CH2, CH2=CF2, cis-, trans-CHF=CHF, and CHF=CF2. The fractions of vibrational energy of HF† among the energies available for distribution in various degrees-of-freedom of product molecules are 19, 23, 11, 7.6, 7.6, and 1.7% for the above molecules, respectively. The statistical calculation results in much less energy disposal in HF vibration in the decompositions of CH2=CHF, CH3CF=CH2, and CH2=CF2, while the distributions of HFt in CHF=GHF and CHF=CF2 are closer to those predicted by the statistical calculation. The deactivation rate of HF† in CH2=CHF is about three times larger than that in CH2=CF2, and the latter values resemble those in HF.
In Situ Measurement of Electrode Surface Change by Photoacoustic Spectroscopy
Authors: Masuda Hideki , Fujishima Akira , Honda Kenichi 
Published: July 2006

Abstract
Photoacoustic spectroscopy (PAS) was used for the study of electrode-electrolyte interfaces in situ. The design of the PAS cell and the experimental procedure are given. The change in absorption at the interface during electrochemical reaction at Au electrodes, as measured by PAS technique, is described.
Polymer Effects under Pressure. IV. The Hydrolysis of Phenyl Esters Catalyzed by α-Chymotrypsin up to 2000 bar
Authors: Taniguchi Yoshihiro , Suzuki Keizo 
Published: July 2006

Abstract
The rates of the hydrolysis of 2-valeryloxy(C5)- and 2-heptanoyloxy(C7)-benzoic acids catalyzed by α-chymotrypsin (α-CHT) were measured at pressures up to 2000 bar at 30 °C and pH 7.8 in a 0.05 M Tris buffer solution. The apparent Michaelis constant, Kmapp, was estimated to vary from 5.9 to 9.9 mM, and kcat from 11×10−3 to 52×10−3 s−1, for the C5 ester, and Kmapp, from 4.7 to 10 mM, and kcat from 37×10−3 to 200×10−3 s−1, for the C7 ester, between 1 and 2000 bar. From the pressure dependences of Kmapp and kcat, the volume changes accompanying the dissociation of the enzyme–substrate complex and the activation volume for the process of the product formation were calculated to be −6.3±2 and −20±2 cm3/mol for the C5 ester and −9.5±2 and −21±2 cm3/mol for the C7 ester. The effects of the pressure on the hydrolysis of p-nitrophenyl acetate (PNPA) catalyzed by α-CHT have also been measured up to 3000 bar at pH 7.8 in a 0.05 M Tris buffer solution and at 25 °C and 35 °C. The activation volumes were −3 cm3/mol at 25 °C and −4 cm3/mol at 30 °C and 25 °C. These results were discussed on the basis of the X-ray study of the enzyme-substrate complex.
Regio- and Stereoselective Cross-aldol Reactions via Dialkylboryl Triflates
Authors: Inoue Tan , Mukaiyama Teruaki 
Published: July 2006

Abstract
New borylating reagents, (Bu2BOTf and 9-BBNOTf), were prepared in high yields. The triflates reacted with enolizable ketones in the presence of tertiary amines to generate selectively one of the regioisomers of vinyloxyboranes by the choice of the reagents (the dialkylboryl triflates and tertiary amines) under mild reaction conditions. Vinyloxyboranes thus generated showed remarkable reactivity toward aldehydes to give only one regioisomer of the corresponding cross-aldols in good yields. High stereoselectivity was also observed in these reactions.
The Reactions of 2-Phenyl-2H-1-benzopyrans and 2-Phenyl-4H-1-benzopyrans with Lead(IV) Acetate
Authors: Kurosawa Kazu , Yamaguchi Katsutoshi , Nagata Yasuyuki , Ohki Hisatake 
Published: July 2006

Abstract
The reactions of 7-methoxy-2-phenyl-2H-1-benzopyran and 7-methoxy-2-phenyl-4H-1-benzopyran with lead(IV) acetate gave 2-benzoyl-6-methoxybenzofuran and 6-acetoxy-3-methoxy-6-(3-oxo-3-phenyl-1 -propenyl)-2,4-cyclo-hexadien-1-one. The reactions of 7-methoxy-2-(p-methoxy-phenyl)-2H-1-benzopyran and 7-methoxy-2-(p-methoxyphen-yl)-4H-1-benzopyran with lead(IV) acetate also gave the corresponding benzofuran and cyclohexadienone. The reaction pathway is discussed.
The Energy Dependence of Selective Hydrogen Atom Abstraction by H(D) Atoms in the Photolysis of Neopentane–Ethane Mixtures at 77 K
Authors: Miyazaki Tetsuo , Guedes Selma Matheus Loureiro , Fueki Kenji 
Published: July 2006

Abstract
Selective hydrogen-atom-abstraction reaction by an H or D atom has been studied in a neo-C5H12–C2H6 (less than 1 mol%) mixture at 77 K by ESR spectroscopy. The H (or D) atom produced by the photolysis of HI (or DI) reacts with neo-C5H12 and C2H6 to form neo-C5H11 and C2H5 radicals. In order to obtain H atoms with different kinetic energies, the photolysis was performed with different lights of 313, 254, and 229 nm. The selective formation of the C2H5 radical by the reaction of the H (or D) atom with C2H6 becomes more effective with the decrease in the energy of the H (or D) atom. The formation of the neo-C5H11 radical by the reaction of the H (or D) atom with neo-C5H12 becomes more effective with the increase in the energy of the H (or D) atom.
Novel Synthetic Reactions Using Bis(2,2,2-trifluoroethoxy)diorganosulfuranes
Authors: Kitazume Tomoya , Ishikawa Nobuo 
Published: July 2006

Abstract
Alkoxy- or acyloxysulfuranes prepared in situ by the ligand exchange of bis(2,2,2-trifluoroethoxy)diorganosulfuranes with alcohols or carboxylic acids were found to behave as a potential alkylating or acylating reagent for the preparation of unsymmetrical sulfides, ketones, and esters.
The Crystal Structure of Tetra-μ-acetato-diruthenium Chloride
Authors: Togano Tadashi , Mukaida Masao , Nomura Terunosuke 
Published: July 2006

Abstract
The crystal structure of Ru2(OCOCH3)4Cl has been determined from visually estimated Cu Kα data. The crystal is composed of the dinuclear, carboxylato-bridged species Ru2(OCOCH3)4+ and the bridging chloride anions. The molecular structure is almost identical with that of the analogous butyrato complex, but the chloridebridged chains run parallel with the c axis only.
Studies on the Solvent Extraction of Metal Perchlorates. II. Extraction of Alkali Metal Perchlorates with Trioctylphosphine Oxide
Authors: Kusakabe Satoshi , Sekine Tatsuya 
Published: July 2006

Abstract
Solvent extraction of alkali metal ions in 1 mol dm−3 sodium perchlorate ionic media with trioctylphosphine oxide (TOPO) in hexane was measured. The extraction improved in the order Li(I)&gt;Na(I)&gt;K(I)&gt;Rb(I)&gt;Cs(I). This was explained in terms of the higher ability of solvation with TOPO of the smaller ions. The chemical form of the extracted species was M(TOPO)n+(ClO4)−, where n is three for Li(I), Na(I), and K(I) and three and four for Rb(I) and Cs(I).
Thermochromism of Metal Chelates with Triphenylmethane Complexons in Aqueous Solutions. III. Copper(II)–Methylthymol Blue and –Methylxylenol Blue Systems
Authors: Nakada Shoji , Yamada Mutsuo , Ito Tasuku , Fujimoto Masatoshi 
Published: July 2006

Abstract
Reversible thermochromisms of copper(II) complexes with 3,3′-bis[bis(carboxymethyl)aminomethyl]thymol-sulfonphthalein (Methylthymol Blue; MTB) and 3,3′-bis[bis(carboxymethyl)aminomethyl]-p-xylenolsulfonphthalein (Methylxylenol Blue; MXB) were studied in aqueous solutions. The thermochromisms of these complexes were primarily ascribed to the temperature-dependence of the protolytic equilibria between a complex species AH having an uncoordinated free phenolic hydroxyl group and a complex species A having a coordinated phenolate group: AH\ightleftarrowsA+H. The equilibrium constants K of the reactions at 25 °C were determined to be p(K/mol dm−3)=4.66 for Cu(II)–MTB and 4.78 for Cu(II)–MXB. The thermodynamic parameters ΔH and ΔS for the reactions were calculated to be 26±2 kJ mol−1 and −6±3 J K−1 mol−1 (298 K) for both complexes, respectively. The rate constants of the proton dissociation of the phenolic hydroxyl group in the complexes AH were estimated to be 1.6×105 and 1.8×105 s−1 for Cu(II)–MTB and Cu(II)–MXB, respectively. The thermodynamic and kinetic data are discussed in terms of the effects of the substituents in the ligand molecules on the thermochromism.
Preparation and Properties of Nitrosyl Complexes of Molybdenum
Authors: Tatsumi Takashi , Sekizawa Kazuhiko , Tominaga Hiroo 
Published: July 2006

Abstract
Reactions of some dpe(dpe=Ph2PCH2CH2PPh2) complexes of molybdenum with nitrosyl hexafluorophosphate (NOPF6) have been investigated. The reaction of MoH4(dpe)2 with NOPF6 in benzene-methanol affords two types of complexes, a protonated species, trans-[MoF(HNO)(dpe)2]PF6 (1a) and a non-protonated species, trans-MoF(NO)(dpe)2·1/2C6H6. From the nitroxyl complex 1a, a series of nitrosyl complexes has been obtained. Some nitrosyl complexes exhibit cis-trans isomerism. Reactions of the nitrosyl complexes with protonic acids afford the corresponding nitroxyl complexes or the anion substitution products. Cationic nitrosyl complexes are obtained by the reactions of Mo(CO)L(dpe)2 (L=N2 or C2H4) and Mo(C2H4)2(dpe)2 with NOPF6. Attempts were also made to prepare nitrosyl complexes of molybdenum by use of other nitrosylating agents.
The Sensitized Photooxidation of Methoxycycloheptatrienes. The Synthesis of α-, β-, and γ-Tropolones
Authors: Yagihara Morio , Kitahara Yoshio , Asao Toyonobu 
Published: July 2006

Abstract
The sensitized photooxidation of 7-methoxycycloheptatriene (7-methoxytropilidene) afforded [4+2] cycloadduct (2), tropone, benzaldehyde and their 2-methoxy derivatives. Thermal isomerization of 2 followed by the treatment with alumina yielded 4-methoxytropone. The photooxidation of 1-methoxytropilidene gave 4-hydroxytropone and o-methoxybenzaldehyde, and the photooxidation of 3-methoxytropilidene followed by the treatment with triethylamine afforded 3-methoxytropone, tropone, and o-methoxybenzaldehyde. Characterization of the products and the mechanisms of the reactions are discussed.
The Temperature Dependence of Carbon-13 Chemical Shifts of Retinal Isomers and Their Related Compounds
Authors: Hanafusa Yoshito , Toda Masakazu , Inoue Yoshio , Chûjô Riichiro 
Published: July 2006

Abstract
The temperature dependence of carbon-13 chemical shifts has been studied for retinal isomers, N-all-trans-retinylidenebutylamine(all-trans-NRB) and N-all-trans-retinylidenebutylammonium chloride (all-trans-NRB·HCl). The change in the chemical shift was discussed in terms of the temperature dependences of the polarizability and conformation of the polyene-chain. In 11-cis-retinal, the coplanarity between the two parts of polyene-chain separated by the cis bond increases with a lowering of the temperature. The equilibrium between 12-s-cis and 12-s-trans conformers in 11-cis-retinal was studied and it was shown the latter conformer is preferable at low temperatures. In all-trans-NRB and all-trans-NRB·HCl, the temperature dependences of the chemical shifts are similar to those in all-trans-retinal. The extents of the chemical shift changes are in the following order: NRB·HCl&lt;NRB&lt;retinal. This trend can be correlated with the order of the red shifts of the absorption spectra.
Additivity Parameters for Anodic Peak Potentials in [2.2]Metacyclophanes and Tetrahydropyrene Formation
Authors: Torizuka Koichi , Sato Takeo 
Published: July 2006

Abstract
The first anodic peak potentials Epa(O1) for sixteen [2.2]metacyclophanes were surveyed in order to correlate the peak potential with the number and position of the alkyl groups. The analysis of the data gives the additivity parameters, which call for cathodic shifts of 0.14 and 0.035 V per methyl group for R2 or R5 (5- or 13-position) and for substitution at the rest of the positions respectively. The controlled-potential electrolysis of the representative metacyclophanes gave excellent yields of the corresponding tetrahydropyrenes.
Hydrates of Organic Compounds. V. The Clathrate Hydration of Alcohols
Authors: Nakayama Haruo , Hashimoto Masayuki 
Published: July 2006

Abstract
A new method for examining the ability of a given substance to form a hydrate with the same structure as that of a reference substance has been established. By using this method, for a series of alcohols ranging from methyl alcohol to pentyl alcohol, including their isomers, the ability to form a clathrate hydrate of either Structure I or Structure II has been investigated. It has been found that: (1) methyl alcohol has the ability to form both Structure I and II hydrates; (2) ethyl alcohol has the ability to form a Structure II hydrate; (3) all C3-alcohols (propyl, isopropyl, allyl, and propargyl alcohol) can actually form Structure II hydrates with relatively high (around −10 °C) incongruent melting points, and (4) among the C4- and C5-alcohols, only t-butyl alcohol has the ability to form a Structure II hydrate. However, it is uncertain for methyl and ethyl alcohols whether they actually can form such hydrates even in the absence of a reference substance. These results strongly suggest that the size and/or shape limitation plays an important role in the formation of alcohol hydrates with a gas-hydrate structure, just as has been found for the formation of ether and ketone hydrates.
The Raman Spectra of Cobalt(III) Complexes. I. Differentiation between cis and trans Isomers of Bis(ethylenediamine)cobalt(III) Complexes
Authors: Kanamori Kan , Kawai Kiyoyasu 
Published: July 2006

Abstract
The Raman spectra of bis(ethylenediamine)cobalt(III) complexes have been studied with a view toward differentiating between the cis and trans configurations. It is shown that a correlation can be made between the configurations of the complexes and the intensity of the band due to the chelate-ring-deformation vibration, δ(cycle). Thus, trans isomers exhibit a strong and sharp band near 270 cm−1 due to this mode, while cis isomers exhibit no intense band at this frequency.
Branched-chain Sugars. XX. Kinetic Studies on the Epimerization of 1,2 : 5,6-Di-O-isopropylidene-3-C-nitromethyl-α-d-allofuranose
Authors: Sato Ken-ichi , Koga Kenji , Hashimoto Hironobu , Yoshimura Juji 
Published: July 2006

Abstract
A study was made on the kinetics of the epimerization of 1,2: 5,6-di-O-isopropylidene-3-C-nitromethyl-α-d-allofuranose in nitromethane to its 3-epimer in the presence of a small amount of sodium methoxide. The activation energy was found to be 75±8 kJ/mol, the intermediate in epimerization being 1,2: 5,6-di-O-isopropylidene-α-d-ribo-hexofuranos-3-ulose with use of the labelled compound.
Functionalization of trans-Decalm. IV. A Stereoselective Synthesis of dl-β-Costol, dl-Arctiol, and the Related Eudesmane Type Sesquiterpenes
Authors: Torii Sigeru , Inokuchi Tsutomu 
Published: July 2006

Abstract
The efficient synthetic procedures to dl-β-costol (1a), dl-arctiol (2), and the related eudesmane type sesquiterpenes are described. trans-8,8-Ethylenedioxy-4aβ-methyldecalin-2α-ol (6a), prepared from trans-1,1-ethylenedioxy-4aβ-methyl-Δ6,7-octalin by epoxidation and subsequent reduction of the epoxy ring, was converted into 1a as follows: (1) deacetalization of 6a followed with mesylation, giving 2α-methylsulfonyloxy-4aβ-methyldecalin-8-one (7b), (2) condensation of 7b with methyl sodiomalonate and subsequent Wittig reaction with methylenetriphenylphosphorane affording dimethyl (trans-4aβ-methyl-1-methylene-7β-decalinyl)malonate (9), (3) reduction of sodium salt of 9 with NaAl(OCH2CH2OMe)2H2. Oxidation of 1a with PCC gave dl-β-costsd. dl-Arctiol (2), structurally related to 1a, was prepared from trans-5,5-ethylenedioxy-8aβ-methyldecalin-2-one. Introduction of two equatorial substituents, such as hydroxyl and 1-hydroxy-1-methylethyl groups at the C-2 and C-3 carbons of 2, was carried out as follows: (1) methoxycarbonylation followed by methylation of the sodium salt of keto ester with MeLi, (2) subsequent reduction with lithium in liquid NH3, giving trans-5,5-ethylenedioxy-3β-(1-hydroxy-1-methylethyl)-8aβ-methyldecalin-2α-ol (14), and (3) deacetalization of 14 followed by the reaction with methylenetriphenylphosphorane. dl-Eudesma-4(14),7(11)-dien-8-one was also prepared from 2 by oxidation with PCC followed by dehydration and subsequent isomerization of double bond.
Production of Furan by Vapor-phase Oxidation of Crotonaldehyde Using Heteropoly Compounds as Catalysts
Authors: Ai Mamoru , Tsai Tian-hsi , Ozaki Atsumu 
Published: July 2006

Abstract
The synthesis of furan by direct vapor-phase oxidation of crotonaldehyde has been studied. It was found that heteropoly compounds such as 12-molybdophosphoric acid are more effective than the mixed oxide (MoO3–P2O5, P/Mo=1/12) as catalyst for furan formation, and that the cesium salt of 12-molybdophosphoric acid with a Cs/Mo atomic ratio of 1/12 is more effective than the 12-molybdophosphoric acid catalyst. The rate of furan formation increases with increase in steam concentration in the feed, but is nearly independent of oxygen and crotonaldehyde concentrations. The yield of furan increases by decreasing the crotonaldehyde concentration, attaining 60 mol% at a concentration of 0.17 vol% in the feed. The conversion of crotonaldehyde at maximum yield is 90–95%.
Relationship between Chemical Selectivity and Melting Points of Reacting Molecules
Authors: Endo Tadashi , Takeda Yukiko , Orii Toyohiko , Kuwahara Akio , Ohta Masahiro , Sakai Miyuki , Okada Reiko , Hashimoto Masao 
Published: July 2006

Abstract
A relationship has been found to exist between the selectivity (the ratio of an unsymmetrical disulfide to symmetrical one) in the oxidation of a pair of associating thiols, 1-acyl-3-(2-sulfhydrylethyl)urea (1) and 1-(p-N,N-dimethylaminophenyl)-3-(sulfhydrylacetyl)urea, and the melting point of 1 in cases where 1 belongs to a homologous series.
Reaction between Aluminium Trichloride and Oxygen in the Vapor Phase and Properties of the Aluminium Oxide Formed
Authors: Shoji Yuichi , Tatsumi Kimikazu , Matsuzaki Ryoko , Saeki Yuzo 
Published: July 2006

Abstract
The reaction between gaseous AlCl3 and oxygen occurs at above ca. 400 °C and proceeds appreciably above ca. 800 °C to form Al2O3 and chlorine. The Al2O3 formed is amorphous Al2O3 at 800 °C, γ-Al2O3 containing amorphous Al2O3 at 900 and 950 °C, and γ-Al2O3 at 1000 °C. The phase transition of the Al2O3 formed is discussed.
Mechanistic Interpretations of the Dye-sensitized Formation of Hydrogen Peroxide in an Aqueous Solution
Authors: Usui Yoshiharu , Kobayashi Ei-jurou , Kazami Akira , Sakuma Shinobu 
Published: July 2006

Abstract
Kinetic studies of the photosensitized formation of hydrogen peroxide and hyperoxide ions in a mixed aqueous solution of eosine, oxygen, and EDTA have been attempted on the basis of a switch-over of the primary processes, i.e., the so-called DD, DR, and DO mechanisms. The rate constants for reactions of E+···E− and E+···O2− intermediates with oxygen and EDTA were obtained. The yield of hydrogen peroxide via the DO-initiated mechanism was enhanced as much as one order of magnitude (≈0.012) by the addition of 0.15 mol dm−3 of sodium borate or sodium carbonate. The maximum yield, 0.08, of hydrogen peroxide was obtained in an aerated aqueous solution of 1.0×10−4 mol dm−3 of eosine, 5.0×10−2 mol dm−3 of EDTA, and 8.8×10−2 mol dm−3 of sodium borate.
Formation of Sr2SiO4 and SrSiO3 from Strontium Silicate Hydrate Prepared by the Alkoxy Method
Authors: Yamaguchi Osamu , Ito Yoshifumi , Shimizu Kiyoshi 
Published: July 2006

Abstract
Sr2SiO4 and metastable SrSiO3 were formed directly at low temperatures from 3SrO·2SiO2·3H2O prepared by the alkoxy method. The transformation of metastable into stable SrSiO3 was observed at 900–980 °C. A kinetic study was made on the formation of Sr2SiO4.
Raman Spectra of Cobalt(III) Complexes. II. Nitroammine Series of Cobalt(III) Complexes
Authors: Kanamori Kan , Morikawa Tsutomu , Kawai Kiyoyasu 
Published: July 2006

Abstract
Solid and aqueous Raman spectra of the nitroammine series of cobalt(III) complexes, [Co(NO2)n(NH3)6−n](3−n)+ (n=1–6), have been measured for the region of 1500–100 cm−1. The assignments of the Raman bands due to the skeletal vibrations of the complexes have been made on an empirical basis and compared with those of the infrared bands in the literature.
A Potentiometric Study on Complex Formation of Silver(I) Ion with Glycine and β-Alanine in Aqueous Solution
Authors: Ohtaki Hitoshi , Zama Masayuki , Koyama Hidemi , Ishiguro Shin-ichi 
Published: July 2006

Abstract
The complex formation of silver(I) ion with glycine and β-alanine was studied at 25 °C in an aqueous solution containing 3 mol dm−3 LiClO4 as a constant ionic medium by means of potentiometric titrations. At a relatively low pH region, the AgHL+ complex (L− represents glycinate and β-alaninate ions) was formed, in which the silver ion was coordinated with the carboxyl group of the ligands. At a medium pH range, the AgL and AgL2− complexes were formed. From the formation constants of the complexes, it is suggested that the silver ion within the complexes may be coordinated with the amino group of the ligands and the interaction between the metal ion and the carboxyl group within the complexes is so weak that the interaction does not appreciably stabilize the complexes. At the highest pH region, the hydrolyzed species Ag(OH)L− was formed.
Reaction of Bis(dimethylglyoximato)(pyridine)styrylcobalt(III) Derivatives with Arenesulfenyl Chloride
Authors: Tada Masaru , Shinozaki Hiraku , Miura Kyo 
Published: July 2006

Abstract
cis-Styryl and trans-styryl-type cobaloximes, having a para-substituent on the styrene moiety, give the corresponding cis- and trans-(styrylthio) benzene derivatives in excellent yields by the reaction with 2,4-dinitrobenzenesulfenyl chloride. The substitution proceeds stereospecifically with retention of configuration except for the case of cis(p-cyanostyryl) cobaloxime.