bluuebunny/crossref_metadata_2025_split huggingface dataset:
Studies on Metal Chelates of 8-Hydroxy-5-quinolyl Ketone Oxime, O-Carbamoyl and O-Thiocarbamoyl Derivatives as Bactericides
Authors: Khalil Z H , Abdel-Hafez A A , Yanni A S , Moharam A M 
Published: July 2006

Abstract
The reaction of 5-acetyl-8-quinolinol (1) and corresponding chalcone derivatives 2a–f with hydroxylamine hydrochloride in boiling pyridine gave the corresponding oximes 3 and 4a–f respectively in almost quantitative yields. Further interaction of 3 and 4a–e with phenyl isocyanate and/or thiocyanate the corresponding carbamate and/or thiocarbamate (5a,b) and (6a–e, 7a–e) were achieved. Metal chelates of 1, 3, and 4e,f with bivalent metal cations like Fe(II), Cu(II), and Zn(II) have been synthesized and characterized by elemental and IR-spectral analysis. The synthesized compounds were biologically screened to study the structure activity relationship, (SAR) and the effect of complexation and type of metal cation on the potency of the more biologically active compounds.
Terpenoids. XI. Mayurone Oxide
Authors: Nagahama Shizuo , Fuchinoue Takafumi , Tazaki Masato 
Published: July 2006

Abstract
Epoxidation of mayurone 7 gave mayurone oxide 21 in good yield. Grignard methylation of 21 gave epoxy alcohols, 17 and 22. Thujopsadiene monoepoxide 23 was synthesized from 21 by Wittig reaction. Oxide 21 and 23 were found in the autoxidation product of 1. Oxide 21 was found in the autoxidation product of 2, 3, and 6.
Selective Nuclear Halogenation of Polymethylbenzenes with Alumina-Supported Copper(II) Halides
Authors: Kodomari Mitsuo , Satoh Hiroaki , Yoshitomi Suehiko 
Published: July 2006

Abstract
The halogenation of polymethylbenzenes with alumina-supported copper(II) halides under heterogeneous conditions in nonpolar solvents gave nuclear-halogenated compounds selectively in high yields; no side-chain-halogenated compounds were formed.
Racemization of Optically Active Cysteine via Formation of 2,2-Dimethyl-4-thiazolidinecarboxylic Acid
Authors: Shiraiwa Tadashi , Kataoka Kazuo , Sakata Shinji , Kurokawa Hidemoto 
Published: July 2006

Abstract
Optically active cysteine (Cys) was racemized via formation of (RS)-2,2-dimethyl-4-thiazolidinecarboxylic acid ((RS)-DMT) by refluxing in the presence of acetone in 10-fold molar amount in acetic acid. The formed (RS)-DMT was hydrolyzed by adding water to the reaction mixture to give (RS)-Cys in 95–97% yield.
Oxygen Evolution by Means of Water Oxidation Catalyzed by Mononuclear Ruthenium–Ammine Complexes
Authors: Kaneko Masao , Ramaraj Ramasamy , Kira Akira 
Published: July 2006

Abstract
Water oxidation was achieved catalytically by the use of mononuclear ruthenium–ammine complexes and using Ce(IV) as an oxidant. Cyclic voltammetric studies of the mononuclear ruthenium–ammine complexes [Ru(NH3)5Cl]2+ and [Ru(NH3)5(H2O)]3+, have been carried out using Basal Plane Pyrolytic Graphite (BPG) coated with poly(p-styrenesulfonate), Nafion, or Kaolin clay. The electrochemical properties of these ruthenium–ammine complexes show that they can be used as two-electron oxidants for water oxidation. It has also been found that these complexes oxidize water to evolve oxygen in the presence of excess Ce(IV) under homogeneous as well as heterogeneous conditions. The oxygen evolution by means of water oxidation was confirmed by using the H218O isotope in the reaction medium. The water oxidation process was found to be dependent on the ionic strength of the medium. Higher acidic conditions gave higher O2 yields. Heterogeneous catalysis with the Ru complex adsorbed in Kaolin clay was as effective as the homogeneous one. The water oxidation reaction catalyzed by ruthenium–ammine complexes was also discussed.
Measurements of the Polarized ATR Spectra for Adsorbed Dye Layers by Using a Stack of Thin Glass Plates
Authors: Kobayashi Michio , Tokunaga Hitoshi , Okubo Jun , Hoshi Toshihiko , Tanizaki Yoshie 
Published: July 2006

Abstract
Polarized ATR spectra have been measured for the dye layers adsorbed on stacked, thin glass plates. For the adsorbed Crystal Violet (CV) layer, the metachromasy band in the || polarized ATR spectrum is blue-shifted and intensified in comparison with that in the ⊥ polarized ATR spectrum. This is in marked contrast to the observation for the adsorbed Methylene Blue (MB) layer that the || polarized ATR spectrum is similar in shape and position to the ⊥ polarized ATR spectrum. The blue shift and the enhancement of the metachromasy band in the || polarized ATR spectrum for the adsorbed CV layer is ascribed to an optical property characteristic of the adsorbed CV layer; the adsorbed CV layer exhibits an extra electronic transition band located at the high-energy side of the metachromasy band and polarized normal to the glass plane. Two possible explanations for the occurrence of this extra band are presented.
Structure and Optical Properties of a Thermochromic Schiff Base. Thermally Induced Intramolecular Proton Transfer in the N,N′-Bis(salicylidene)-p-phenylenediamine Crystals
Authors: Hoshino Naomi , Inabe Tamotsu , Mitani Tadaoki , Maruyama Yusei 
Published: July 2006

Abstract
A thermochromic derivative of salicylideneaniline, N,N′-bis(salicylidene)-p-phenylenediamine (BSP), has been prepared and subjected to structural and optical studies in the crystalline state. An X-ray crystallographic analysis has shown that the molecules are planar and are stacked in a parallel fashion to form one-dimensional columns. The interplanar spacing has been found to be quite short, suggesting the existence of an intermolecular charge-transfer interaction. The molecule contains fairly short O–H··· N hydrogen bonds, the strength of which is manifested in an OH stretching absorption band in the infrared region, showing considerable broadening and a low-frequency shift. The BSP crystals are remarkably thermochromic, and visible absorption and emission spectral changes with temperature have been interpreted in terms of an intramolecular proton transfer from the hydroxyl oxygen to imine nitrogen through the O–H··· N hydrogen bond. The emission spectra have also been examined under high pressures.
Charge Transfer Complexes Based on the Twin-TCNQ-Type Acceptor 11,11,12,12,13,13,14,14-Octacyano-1,4:5,8-anthradiquinotetramethane (OCNAQ)
Authors: Inabe Tamotsu , Mitsuhashi Tsutomu , Maruyama Yusei 
Published: July 2006

Abstract
Charge transfer complexes of OCNAQ with pyrene, PT (phenothiazine), TMTTF (tetramethyltetrathiafulvalene), TTF (5,6 : 11,12-bis(epidithio)naphthacene), and TTF (tetrathiafulvalene) have been prepared. The pyrene and PT complexes are electrically insulating and the ground state is neutral. In most of the other complexes OCNAQ is fully charged. One of the TTT complexes, (TTT)2OCNAQ(DMF), where DMF is N,N-dimethylformamide, has been found to show metallic conductivity. A structural study has revealed that short S···N contacts exist between TTT and OCNAQ, in addition to one-dimensional TTT stacks. This transverse interaction has been demonstrated by the small anisotropy of the conductivity. The 2 : 1 TTF complex is also metallic down to 43 K, at which point a metal-to-insulator transition occurs. A structure analysis and thermoelectric power data suggest that the charge conduction in this crystal takes place not only through the TTF stacks but also through a two-dimensional network of the OCNAQ molecules.
Reactivities of Stable Rotamers. XXIV. Formation of Isomeric Ketones by Cydization of Rotameric 3-Methyl-3-(1,2,3,4-tetrahalo-9-triptycyl)butanoyl Chloride and Barriers to Isomerization of the Ketones
Authors: Oki Michinori , Tanuma Toshihiro , Tanaka Yasuhiro , Yamamoto Gaku 
Published: July 2006

Abstract
Rotational isomers of 3-methyl-3-(1,2,3,4-tetrahalo-9-triptycyl)butanoic acid, where the halo is either fluoro or chloro have been prepared. Cyclization of their acid chlorides afforded ap- and sc-ketones from ap- and sc-isomers, respectively. The barriers to isomerization were 29.9 and 26.8 kcal mol−1 at 363 K, for the fluoro and the chloro ketones, respectively, for the ap→±sc process. The equilibrium constants (sc/ap) at 363 K were 2.34 and 18.5 for the fluoro and the chloro compounds respectively. The barriers to isomerization and the relative stabilities of the isomeric ketones were discussed based on the MMP2(NONPLANAR) calculation results and the steric congestion in the ground state.
New Ferroelectric Liquid Crystal Materials: (+)-4-(2-Methylbutoxycarbonyl)phenyl 4-(5-Alkyl-1,3-dioxan-2-yl)benzoate
Authors: Haramoto Yuichiro , Kawashima Katumasa , Kamogawa Hiroyoshi 
Published: July 2006

Abstract
(+)-4-(2-Methylbutoxycarbonyl)phenyl 4-(5-alkyl-1,3-dioxan-2-yl)benzoate (12), (+)-4-(2-methylbutoxy)-phenyl 4-(5-alkyl-1,3-dioxan-2-yl)benzoate (11) and the corresponding 1,3-oxathiane (13, 14) and 1,3-dithiane compounds (15, 16) were synthesized. The mesomorphic behaviors of these compounds were measured. Compounds 12 exhibited the ferroelectric liquid-crystal behavior (R=n-C11H23: −4 SmC* 94 °C), while the corresponding 1,3-oxathiane (13, 14) and 1,3-dithiane compounds (15, 16) did not exhibit such behavior. Therefore, 1,3-dioxane compounds are more favorable for transition of SmA to SmC* than the 1,3-oxathiane or 1,3-dithiane analogs.
Synthesis of Fluorescent Amino Acids and Peptides with 2-Aminopyridine at the Carboxyl or Amino Terminus
Authors: Mega Tomohiro , Hamazume Yasuki , Ikenaka Tokuji 
Published: July 2006

Abstract
N-(2-Pyridyl) derivatives of glycine (1), Dl-alanine (2), Dl-valine (3), and Dl-norleucine (4) were synthesized as fluorescence labeled amino acids. These amino acids were used for the synthesis of N-terminal fluorescencelabeled peptides. N-(2-Pyridyl)-1,2-ethanediamine (7) was synthesized and used for the C-terminal labeling of amino acids and peptides. With these amino acid derivatives, some peptides labeled with 2-aminopyridine were synthesized and their spectroscopic characteristics were examined.
Preparation and Properties of Inclusion Compounds of η3-Allylpalladium Complexes with Cyclodextrins
Authors: Harada Akira , Takeuchi Mizutomo , Takahashi Shigetoshi 
Published: July 2006

Abstract
Inclusion compounds of di-μ-chloro-bis(η-allyl)dipalladium and its analogues with cyclodextrins (CDs; α-CD, β-CD, and γ-CD) were prepared. One-to-one inclusion compounds were obtained in high yields by the treatment of β- and γ-cyclodextrin with di-μ-chloro-bis(η-allyl)dipalladium and its analogues. The formation of inclusion compounds is selective. β-CD formed inclusion compounds with di-μ-chloro-bis[1-3-η-(2-methylallyl)]dipalladium in high yield, but it did not form any inclusion compounds with di-μ-chloro-bis(1-3-η-2-butenyl)dipalladium. γ-CD formed inclusion compounds with all the η3-allylpalladium complexes tested in high yields. α-CD did not form inclusion compounds with any η3-allylpalladium complexes tested. The thermogravimetric measurements show that η3-allylpalladium complexes are stabilized when they are included in the CD cavity. The inclusion compounds were characterized by 1H NMR, IR, UV, and circular dichroism spectra.
The Redox Reaction by Ferrocene Derivatives Introduced to a Crown Ether in a Liquid Membrane System
Authors: Ozeki Eiichi , Kimura Shunsaku , Imanishi Yukio 
Published: July 2006

Abstract
In an organic liquid membrane system, 4′-(ferrocenylcarbonylamino)benzo-18-crown-6 (FCC) dissolved in a dichloromethane membrane was found to reduce hexacyanoferrate(III) ions in the aqueous phase to hexacyanoferrate(II) ions at a rate dependent on the type of metal ion coexisting in the aqueous phase, and bound to the benzo-18-crown-6 unit of FCC.
Studies on Coupling Reaction of 1-Naphthol. XI. Effect of Additives on the Dissociation Equilibrium of 4-(4-Nitrophenylazo)-1-naphthol in Pyridine
Authors: Kishimoto Satoshi , Okushi Tsuneo , Hirashima Tsuneaki 
Published: July 2006

Abstract
The dissociation of 4-(4-nitrophenylazo)-1-naphthol (azo dye) in pyridine was found to be accelerated by the addition of small amounts of quaternary ammonium compounds, R4N+X−. The apparent equilibrium constant of the azo dye was influenced enormously by the species of X−, but was little affected by the structures of R. The effect increased as the X− became more basic, ClO4−&lt;I−&lt;BF4−&lt;Br−&lt;HSO4&lt;Cl−, in proportion to the ability of X− to bind with protons formed by dissociated azo dye. The basicity of the X−, pKc, was correlated linearly with the variation of the equilibrium constant, owing to the addition of R4N+X−, δpKa. The dissociation of the azo dye in pyridine–water mixtures was also accelerated upon increasing the amount of water (0–10 vol%), correlating with an increase in the basicity of the solution.
Synthetic Photochemistry. XLV. Photoconversion of 2-Methylenehomobarrelenes to 9-Methylenebarbaralanes
Authors: Tian Guan Rong , Sugiyama Shigeru , Mori Akira , Takeshita Hitoshi 
Published: July 2006

Abstract
The photolysis of 4-methoxycarbonyl-2-oxatricyclo[6.2.2.01,5]dodeca-4,6,9,11-tetraen-3-one derivatives yielded 9-methylenebarbaralanes along with 5-methylenetricyclo[4.3.0.02,9]nonadiene and 1-methyleneindan derivatives. From the benzophenone-sensitization experiments, 9-methylenebarbaralane and 5-methylenetricyclo[4.3.0.02,9]nonadiene were formed via a triplet excited state, but 1-methyleneindan was formed via a singlet excited state.
Efficiency of Azodyes in Retarding the Dissolution of Aluminium in Hydrochloric Acid
Authors: Fouda Abd El-Aziz El-Sayed , Abu-El-Nader Hamed , Moussa Mahmoud Nor El-Din , Shehata Ibrahim 
Published: July 2006

Abstract
The inhibition of the corrosion of aluminium in hydrochloric acid solution by some 4-(m-Substituted phenylazo)pyrazoles has been studied by three different techniques. The inhibitor efficiency calculated from the three techniques are in good agreement. The corrosion rate is a function of temperature, concentration, and nature of the inhibitor. The inhibitors appear to function through general adsorption following the Langmuir adsorption isotherm. Thermodynamic parameters for adsorption of inhibitors have been calculated and discussed.
1,1′-Bis(selenocyanatomercurio)ferrocene as Ligand towards M(NCS)2 [M=Co(II), Ni(II), and Zn(II)]
Authors: Singh Pashupati Prasad , Singh Divya , Singh Narendra Bahadur 
Published: July 2006

Abstract
A comparative study of the behaviors of 1,1′-bis(selenocyanatomercurio)ferrocene (FBMS) with those of its thiocyanate analog (FBMT), has been made. Various physicochemical studies indicate that the Lewis acids and the adducts formed by FBMS are less stable than those of FBMT. The Dq values of FBMS adducts are higher, but the β values are lower. The matching constant values of FBMT complexes are higher than their corresponding FBMS complexes. The structures of Lewis acids and the adducts are similar in both the cases.
Solvent and Reversed-Phase Extraction Chromatographic Separation of Niobium, Zirconium, and Hafnium with Aliquat 336
Authors: Das Nitya Ranjan , Chattopadhyay Putul 
Published: July 2006

Abstract
Aliquat 336 has been employed as an effective anionic extractant for the radiochemical separation of niobium, zirconium, and hafnium in mixtures using solvent extraction and reversed phase extraction chromatography (RPEC). In solvent extraction, niobium and zirconium are extracted with reagent solutions in the respective concentration ranges &lt;0.001–0.04 mol dm−3 and 0.5 mol dm−3 leaving hafnium in the aqueous phase. In RPEC, niobium and zirconium are extracted by the reagent impregnated column and hafnium is completely eluted with water. Zirconium and niobium subsequently are eluted successively with 0.5 mol dm−3 HNO3 and 1 mol dm−3 HF solutions. Distribution studies indicate that the extracted species for niobium and zirconium are respectively mono- and dinegative in charge. The extent of separation and the purity of the separated species were verified by means of gamma-ray spectrometry.
Organophosphorus Analogues and Derivatives of the Natural l-Amino Carboxylic Acids and Pep tides. IV. A PhosphaC-Peptide Analogue of Plumbemycin A
Authors: Natchev Ivan A 
Published: July 2006

Abstract
A condensation of 1,2-azaphosphorine 1 and the dipeptide 2 to the entirely protected phosphaC-tripeptide 3 was carried out by the DCC method. A high selectivity was achieved in the enzyme-catalyzed hydrolysis of the ethoxycarbonyl groups with alkaline mesintericopeptidase to 4 and of the peptide bond Ala–Asp with α-chymotrypsin to 5, which in acid-catalyzed hydrolysis releases the norvaline 6. Antitumor activity of the phosphaC-peptides 4 and 5 was found.
Crystal Structure of K4[H2P2Mo5O21]·2H2O
Authors: Ozeki Tomoji , Ichida Hikaru , Miyamae Hiroshi , Sasaki Yukiyoshi 
Published: July 2006

Abstract
K4[H2P2Mo5O21]·2H2O crystallizes in monoclinic system, P21/a with a=13.648(4), b=15.591(7), c=10.889(4) Å, β=94.21(2)°, U=2311(1) Å3, Z=4. It contains a discrete pentamolybdodiphosphite anion, [H2P2MO5O21]4−, which has, approximately, a C2v symmetry. Its framework is the same as those found in the pentamolybdodiphosphate and the pentamolybdodiphosphonate anions. The P–O and Mo–O distances are 1.49–1.55 and 1.69–2.46 Å, respectively.
Hexacarbonylmolybdenum-Induced N–N Bond Cleavage of Pyrazoles. Conversion of 1-Acylpyrazoles to Pyrimidines
Authors: Nitta Makoto , Hamamatsu Tatsuo , Miyano Hiroyuki 
Published: July 2006

Abstract
[Mo(CO)6]-induced reactions of 1-acyl-3,5-disubstituted pyrazoles underwent N–N bond cleavage and subsequent cyclocondensation to give pyrimidines as well as deacylation to give 3,5-disubstituted pyrazoles. Under similar conditions, 1,3,5-trisubstituted pyrazoles, which have no electron-withdrawing substituent on N1, gave no product, except for the starting materials.
General Synthesis of 2-, 3-, and 4-Hydroxyalkylphosphonium Salts by the Reaction of Triphenylphosphine with Cyclic Ethers in the Presence of Strong Acids
Authors: Yamamoto (formerly Nakamura) Shin-ichi , Okuma Kentaro , Ohta Hiroshi 
Published: July 2006

Abstract
Cyclic ethers were efficiently converted to the corresponding hydroxyalkylphosphonium salts by the reaction with triphenylphosphine and trifluoromethanesulfonic or trifluoroacetic acid. The reaction of these salts with bases afforded the corresponding phosphonium inner salts which reacted with carbonyl compounds to give homoallylic alcohols.
Withacoagin, a New Withanolide from Withania coagulans Roots
Authors: Neogi Partha , Kawai Masao , Butsugan Yasuo , Mori Yuji , Suzuki Makoto 
Published: July 2006

Abstract
The structure of withacoagin, a new withanolide isolated from Withania coagulans, has been elucidated as (20R,22R)-5α,20-dihydroxy-1-oxowitha-2,6,24-trienolide by spectral analysis and chemical transformation to a known compound. This is the second report of a Δ6-withanolide. Isolation of three known compounds, (20R,22R)-6α,7α-epoxy-5α,20-dihydroxy-1-oxowitha-2,24-dienolide, (20S,22R)-6α,7α-epoxy-5α-hydroxy-1-oxowitha-2,24-dienolide, and withaferin A, are also reported.
Synthesis and a Novel Fragmentation of 6-Alkoxy-5,6-dihydro-4H-1,2-oxazine 2-Oxide
Authors: Tohda Yasuo , Yamawaki Norihiko , Matsui Hiroko , Kawashima Toshihide , Ariga Masahiro , Mori Yutaka 
Published: July 2006

Abstract
An electron-deficient nitro olefin, methyl α,p-dinitrocinnamate, reacts with vinyl ethers to give cyclic nitronic esters, which are stable as compared with those produced by reactions of nitro olefins with enamines. Stability of the cyclic nitronate depends on the properties of the substituents at 4- and 6-positions of the ring. The adducts undergo fragmentation by a catalytic amount of base to β,γ-unsaturated α-hydroxyimino esters.
Autoxidation of Solid Guaiazulene and of the Solution in DMF in the Presence of Base or Acid: A Comparative Study of the Product Distribution
Authors: Takekuma Shin-ichi , Matsubara Yoshiharu , Yamamoto Hiroshi , Nozoe Tetsuo 
Published: July 2006

Abstract
Autoxidation of guaiazulene was examined in detail under the following conditions: in a highly diluted DMF solution, in DMF in the presence of acid or base (at 80–100 °C), and as solid state under sunlight or in the dark (at 25–50 °C). In all cases a wide variety of products were obtained (33 separable compounds altogether), and a comparable study on the distribution of the products under the various reaction conditions was made to establish more precise reaction pathways for the formation of these interesting compounds.
Anomalous Reaction of Arylmalononitriles with Nitric Acid. Para-Directing Nature of Dicyanomethyl Group and a Through-Ring Nitro/aci-Nitro Tautomerism of 4-Nitrophenylmalononitrile
Authors: Suzuki Hitomi , Koide Hideki , Ogawa Takuji 
Published: July 2006

Abstract
Phenylmalononitrile reacts with nitric acid in dichloromethane at room temperature to afford 1,2-bis(4-nitrophenyl)-1,1,2,2-tetracyanoethane as an initial product, which readily suffers oxidative cleavage to give 4-nitrobenzoyl cyanide. Contrary to common understanding, dicyanomethyl group exhibits no meta-directing property. 4-Nitrophenylmalononitrile is found to exist in two stable tautomeric forms, which undergo a facile nitro/aci-nitro interconversion across aromatic ring depending on the nature of solvent employed.
Hydrogen Separation Using LaNi5 Films Deposited on Polymer Membranes
Authors: Sakaguchi Hiroki , Adachi Gin-ya , Shiokawa Jiro 
Published: July 2006

Abstract
Hydrogen separation has been investigated using LaNi5 films deposited by means of a sputtering method on a nickel-coated Teflon or on a nickel-coated polyimide membrane. Separation factors were estimated for an H2(50 mol%)–Ar(50 mol%) gas mixture. The permeation rate of the Ni/LaNi5 multilayered film was found to be larger than that of the Ni film. Hydrogen was concentrated to as high as 97.6 mol% under the best conditions.
The Isomerization of 1-Butene to cis-2-Butene over CaO by Means of the Pulse-Reaction Method
Authors: Arata Kazushi , Hino Makoto , Kobayashi Sakari 
Published: July 2006

Abstract
The title reaction was studied over CaO catalysts which had been prepared by the calcination of Ca(OH)2 in air, followed by heating in a He stream or by thermal decomposition in a He flow. The former catalysts gave high cis/trans ratios (up to 21.6), while the latter ones were higher in activity but showed much lower ratios (ca. 1).
The Crystal and Molecular Structure of 1 : 2 Molecular Complex of 1,4-Diazabicyclo[3.3.3]octane (DABCO) with p-Cresol
Authors: Takama Masaaki , Yasui Masanori , Harada Shigeharu , Kasai Nobutami , Tanaka Koichi , Toda Fumio 
Published: July 2006

Abstract
X-Ray crystal structure analysis of the title compound is described. C6H12N2,2C7H8O, F. W. 328.5, monoclinic, space group C2⁄c, a=18.494(1), b=9.250(1), c=11.414(1) Å, β=103.67(1)°, V=1897.4(3) Å3, Dc=1.150 g cm−3 for Z=4. The DABCO molecule in the crystal is bound to two p-cresol molecules by the strong O–H···N hydrogen bonds, and the crystal is composed of p-cresol···DABCO···p-cresol complex units.
Time-Dependent Metastable Fragmentations. The H2O Loss from Ethyl Acetate Ions
Authors: Arakawa Ryuichi 
Published: July 2006

Abstract
The metastable transitions for CH3COOC2H5+→C4H6O+ +H2O have been measured as a function of the ion lifetime of 0–200 μs by using trapped ion mass spectrometry (TIMS). The experimental data were well explained by tunneling corrections to the prior isomerization rate.
Stereoselective Alkylation of Lithium Enolates Generated from t-Butyl Esters of 4-Alkyl-Substituted 5-Hydroxypentanoic Acids
Authors: Ukaji Yutaka , Narasaka Koichi 
Published: July 2006

Abstract
Alkylation of lithium enolates generated from t-butyl esters of 4-alkyl-substituted 5-hydroxypentanoic acid by treatment with lithium pyrrolidinide in THF–HMPA proceeded stereoselectively to afford the corresponding anti-α-alkylated esters.
The Solubilization Equilibrium of 7-Ethoxycoumarins in Ionic Micelles
Authors: Moriya Tetsuo 
Published: July 2006

Abstract
The solubilization behavior of 7-ethoxycoumarin (7EC) and 7-ethoxy-4-methylcoumarin (7E4MC) in aqueous micellar solutions of sodium dodecyl sulfate (SDS) and hexadecyltrimethylammonium chloride (HDTC) was studied by fluorescence spectroscopy. The equilibrium constants for the binding of the fluorophores into micelles and their fluorescence yields in the micellar phase were determined.