bluuebunny/crossref_metadata_2025_split huggingface dataset:
Phosphorescence Spectra of [Cr(NH3)6][Co(CN)6] and [Cr(NH3)6][CdCl5]. Splitting of Their 0–0 Bands
Authors: Yamamoto Yusuke 
Published: July 2006

Abstract
High resolution 2E→4A2 phosphorescence spectra of [Cr(NH3)6][Co(CN)6] and [Cr(NH3)6][CdCl5] were measured. The 0–0 bands split into two components separated by 3.7 and 3.4 cm−1 for [Cr(NH3)6][Co(CN)6] and [Cr(NH3)6][CdCl5], respectively. The same spacings were also resolved in the ν8 bands. The splitting in both cases is assigned as that of the 2E phosphorescent electronic level.
Spin-Probe Study of Aqueous Soap and Polysoap Solutions
Authors: Aizawa Masayuki , Komatsu Tsuyoshi , Nakagawa Tsurutaro 
Published: July 2006

Abstract
Poly(2-vinylpyridine) partially quaternized with 1-dodecylbromide, a “polysoap,” sodium dodecyl sulfate (SDS), and dodecylpyridinium bromide (DPBr) in their micellar solutions were investigated by the spin-probe technique. It was found that the alkyl side chains in polysoap micelles associate more rigidly than in low-molecular surfactant micelles. This fact is attributed to the surface active groups covalently connected to long polymer chains in the polysoap molecule. By a recently developed method, the rotational correlation times of 2,2,6,6-tetramethyl-4-benzoyloxypiperidin-1-oxyl radical in SDS and DPBr micelles were found to be 5.9×10−10 and 3.5×10−10 s/rad, respectively. From the values of the isotropic hyperfine splitting constants, it was estimated that the DPBr micelle solubilizes the probe molecule at a more inner site of the hydrophobic portion than does the SDS micelle.
“Molecular Orbital Analysis” of Naphthalene Derivatives. An Application of Configuration Analysis to the Assignment of Photoelectron Spectra
Authors: Fujii Tsuneo , Suzuki Satoshi 
Published: July 2006

Abstract
Molecular orbital analysis, which is an application of configuration analysis proposed by Baba et al., has been applied to the interpretation of the photoelectron spectra of substituted naphthalenes, with particular attention paid to the dependence of the spectra on the position of substitution and on the character of the substituents. The results of MO calculations based on the Pariser-Parr-Pople method have been analyzed in terms of the π-MO’s of naphthalene and the π-AO or π-MO’s of a substituent. The results of the molecular orbital analysis for naphthalene derivatives with an electron-donating group are compared with the results for those with an electron-accepting group.
A Selectivity Study on Liquid Anion Exchange Membranes
Authors: Yoshida Nobuo , Ishibashi Nobuhiko 
Published: July 2006

Abstract
The selectivity of liquid anion exchange membranes consisting of a perchlorate, thiocyanate, or iodide salt of Crystal Violet dissolved in nitrobenzene was studied by measuring membrane potentials. In bi-ionic systems the selectivity coefficient was observed to vary with the concentrations of aqueous solutions and of the ion exchanger in the membrane. This was attributed mainly to the ionic composition at the membrane-solution interface differing from that in the bulk solution. However, when the concentration of the aqueous solutions was sufficiently high in comparison with that of the ion exchanger, a selectivity coefficient intrinsic to a pair of counter ions was obtained. This selectivity coefficient was also applicable to mixed electrolyte systems and was shown to be consistent with the Conti-Eisenman theory on the relation between the selectivity coefficient and ionic parameters.
Electronic States of the Picric Acid Complexes with 1-Methylnicotinamide, Tryptamine, Dl-Tryptophan, and Serotonin
Authors: Tanaka Masashi 
Published: July 2006

Abstract
The polarized reflection spectra of the crystals of the picric acid complexes with 1-methylnicotinamide, tryptamine, Dl-tryptophan and serotonin have been measured from 15000 to 40000 cm−1 and the molar extinction coefficient of these crystals has been obtained by the Kramers-Kronig transformation. Furthermore, the theoretical calculation of the electronic states of these complexes has been made and compared with the experimental results. This analysis shows that the appearance of the new band in the region of 20000 cm−1 is the origin of the reddish color of the crystals of tryptamine picrate, Dl-tryptophan picrate, and serotonin picrate; the new band can be assigned to the charge-transfer band from the picrate anion to the indole nucleus.
Synthesis and Properties of Cobalt(II), Nickel(II), and Copper(II) Complexes with Acetaldehyde Oxime and Benzaldehyde Oxime
Authors: Tanaka Hideaki , Kuma Hiro , Yamada Shoichiro 
Published: July 2006

Abstract
Cobalt(II), nickel(II), and copper(II) complexes with acetaldehyde oxime and benzaldehyde oxime have been prepared and characterized by vibrational and electronic spectroscopy, magnetism, and other methods. The cobalt(II) and nickel(II) complexes isolated are of the general formulae: (A) MX2(oxime)4 (X=Cl, Br, I, NO3, NCS and CH3COO); (B) M(NCS)2(oxime)2; (C) MSO4 (oxime)3·3H2O. They are all six-coordinate, and the complexes (B) are probably multinuclear. Copper(II) forms complexes of the formulae: (A) CuX2(oxime)4 (X=Cl, Br), (B) CuX2(oxime)2 (X=Cl, Br, NCS); (C) CuSO4(oxime)H4·H2O. Possible structures for these copper(II) complexes are also discussed. Acetaldehyde oxime and benzaldehyde oxime are unidentates in all these complexes, being coordinated through their nitrogen atom.
A New Type of Iminocarbonylaton of Diols, Mercaptoalkanol, and Dithiol via Their Dibutylstannyl Derivatives
Authors: Sakai Shizuyoshi , Niimi Hiroji , Kobayashi Yoshihiro , Ishii Yoshio 
Published: July 2006

Abstract
Reactions of phenyl isothiocyanate with cyclic and acyclic dibutylstannyl dialkoxides derived from several alcohols, such as 1,2- and 1,3-diols and methanol, afforded quantitatively phenyliminocarbonate derivatives with the elimination of dibutylstannyl sulfide. Cyclic organostannyl sulfides, such as 2,2-dibutyl-1,3,2-oxathiastannolane and -dithiastannolane, reacted with phenyl or alkyl isothiocyanate to give 2-imino-oxathiolane (10) and -dithiolane (14), respectively. At higher reaction temperatures, rearrengment and decomposition of products 10 and 14 occurred.
Stereoselective Monoalkylation of α-Halocyclopropyllithiums. A Versatile Method for the Synthesis of α-Alkylcyclopropyl Acetates and Alkylidenecyclopropanes
Authors: Kitatani Katuzi , Hiyama Tamejiro , Nozaki Hitosi 
Published: July 2006

Abstract
The title carbenoids (7 and 8) prepared by the action of butyllithium on dihalocyclopropanes are smoothly methylated with methyl iodide. The product ratio of cis-methylated product (3)/trans-methylated one (4) (or endo-methylated product (5)/exo-methylated one (6) is found to depend on the aging period of the carbenoids; thermodynamic equilibration gives almost 3 or 5. This procedure has been extended to general alkylation by utilizing HMPA co-solvent. The resulting α-alkylated cyclopropyl halides are converted into allylic acetates or cyclopropyl acetates upon acetolysis and also into alkylidenecyclopropanes upon base treatment. The protonolysis of 8 gives trans- or exo-bromocyclopropanes stereoselectively.
Pressure Effect of the Nondispersive Infrared Gas Analyser
Authors: Yonezawa Tsutomu , Niki Eiji 
Published: July 2006

Abstract
Based on the Elsasser model, a formula for the mean absorption applicable to the pressure effect of the nondispersive infrared gas analyser has been derived. The formula is generalized by removing the assumption in the Elsasser model that the total absorption coefficient, the half width and the spectral distance are constant.
The Synthesis of the (Diacetylmethyl)tropylium Ion and Its Transformation to the 3-Acetyl-2-methylfurotropylium Ion
Authors: Komatsu Koichi , Tanaka Satoshi , Saito Seiki , Okamoto Kunio 
Published: July 2006

Abstract
The intramolecularly hydrogen-bonded cation, the (diacetylmethyl)tropylium ion (3), has been synthesized. The deprotonation of 3 does not afford 8,8-diacetylheptafulvene, but does give the intramolecularly cyclized cycloheptatriene derivative, which can be transformed to the peripheral ten-π-electron cation, 5; 5 is characterized by means of 13C NMR spectroscopy.
Addition Reaction of Copper(I) Methyltrialkylborates with Ethyl Propiolate. Stereospecific Synthesis of (E)-α,β-Unsaturated Acid Esters
Authors: Yamada Kinji , Miyaura Norio , Itoh Mitsuomi , Suzuki Akira 
Published: July 2006

Abstract
The reaction between ethyl propiolate and copper(I) methyltrialkylborates was found to give the corresponding addition products which are converted by hydrolysis into the α,β-unsaturated acid esters in relatively good yields. The α,β-unsaturated esters thus obtained are selectively E-isomers.
Electron-Capture Reaction of Halogenated Benzenes in MTHF Glass at 77 K
Authors: Shimokawa Toshinari , Sawai Takeshi 
Published: July 2006

Abstract
The relative electron-capture efficiency of a number of halogenated benzenes was determined by means of competition with biphenyl as a reference material in glassy MTHF at 77 K. It was observed that the efficiency increased as the number of chlorine-atom substitutions on the benzene ring increased. Similar results were obtained for brominated benzenes. An excellent linear correlation is found between the logarithm of the efficiency and the polarographic reduction potential of a series of chlorinated benzenes. Moreover, a semilog plot of the efficiency vs. electron affinity of monohalogenated benzenes is apparently linear. The mechanisms of the electron-capture reaction are also discussed.
Synthesis and PMR Study of Mixed Ligand Cobalt(III) Complexes with Aliphatic α-Hydroxyimino Ketone and Pyridine
Authors: Tanaka Minoru , Ryu Ryonte , Masuda Isao , Shono Toshiyuki 
Published: July 2006

Abstract
Cobalt(III) complexes with a series of aliphatic α-hydroxyimino ketone (moH) and pyridine (py) were obtained as fine crystals. The aliphatic α-hydroxyimino ketones used are R–C(=O)–C(=NOH)–R′ where R=CH3 or C2H5 and R′=CH3, C2H5, i-C3H7, n-C3H7 or COCH3. These complexes are formulated as [Co(mo)2(py)2]ClO4. The PMR spectral investigation shows that the proton resonances of the alkyl group bound to the hydroxyimino group are shifted toward higher fields upon complex formation. This unusual upfield shift is accounted for by consideration of the specific configuration and ring-current of the pyridine in the complex.
12,13-Epoxy-C-nor-D-homosteroids. IV. The Reaction of 11-Oxygenated 17α-Acetyl-12α,13α-epoxyetiojervanes with Boron Trifluoride Etherate
Authors: Murai Akio , Sasamori Hiroshi , Masamune Tadashi 
Published: July 2006

Abstract
The titled compounds were treated with boron trifluoride etherate in benzene at room temperature, 11α-Hydroxy-12α,13α-epoxide (1) underwent rapid cleavage of the epoxy ring at both C13 and C12 to give 11α-hydroxy-13β-fluoro-12α-alcohol (2), 13α-hydroxy-12β-11-ketone (3), 17-deacetyl-Δ12-11-ketone (4), and an acetophenone derivative (5) in comparative yields. The same acid treatment of 11α-acetoxy-12α,13α-epoxide (1a) yielded 11α-acetoxy-13β-fluoro-12α-alcohol (2a) as a single isolable product, while that of 11-unsubstituted 12α,13α-epoxide (16) afforded 12β-fluoro-13α-alcohol (17) besides 5, a major product. Evidently, compounds 2a and 17 are products formed by the epoxy ring opening at C13 and C12 respectively. Interestingly, compounds 2 and 2a, when treated with bases, produced a rearranged 13α-pregnane derivative (12) via 11α, 12α-dihydroxy-Δ13(17)-20-ketone (10), in good yields. On the other hand, the epoxy cleavage of 11-oxo-12α,13α-epoxide (13) led to predominant formation of rearranged products, bicyclo[3.3.1]nonane-2,9-dione and hydrooxepin derivatives (14 and 15). It is emphasized that the epoxy cleavage reactions proceeded more slowly and took place at C13 rather than at C12 with increase of electronegativity of the 11-substituents.
The Reactions of 1,3-Indandiones and 1,3(2H)-Phenalenediones with Lead Tetraacetate
Authors: Ezoe Keiichi , Kurosawa Kazu 
Published: July 2006

Abstract
The reaction of 1,3-indandione with lead tetraacetate gave phthalic anhydride and 2,2-diacetoxy-1,3-indandione. The reaction of 2,2-dihydroxy-1,3-indandione gave phthalic anhydride. The reactions of 1,3(2H)-phenalenedione and 2,3-dihydroxy-1-phenalenone yielded acenaphthenequinone and 1,8-naphthalenedicarboxylic anhydride. The reactions of acenaphthenequinone and 2,2-dihydroxy-1,3-phenalenedione gave 1,8-naphthalenedicarboxylic anhydride with higher yields. The reactions of [2-14C]-labeled compounds showed that the middle carbon atom was lost.
The Volumetric Behavior of Nitrobenzene in Electron Donating Solvents
Authors: Fried Vojtech , P. Miller Lewis , Wachter Howard N 
Published: July 2006

Abstract
The excess volumes of 18 binary solutions containing nitrobenzene as a weak electron acceptor and various mono- and polysubstituted aromatic donors were evaluated at 25 °C. The partial molal volume of nitrobenzene in these solvents was also evaluated. There is no quantitative correlation between the volumetric behavior of the solutions and the electron donor acceptor abilities of the solution constituents. The results, however, clearly prove that isomers of higher cohesive energy affect the volumetric behavior of solutions less than their lower cohesive energy counterparts. An attempt is made to interpret this observation in terms of the steric effect and the cohesive energy of donors.
Synthesis and Spectra of 3-Benzyl(or p-tolyl)-5-methyl-2-(substituted benzothiazol-2′-ylimino)-4-thiazolidones
Authors: Shyam Radhey , Tiwari I C 
Published: July 2006

Abstract
Some 3-benzyl(or p-tolyl)-5-methyl-2-(substituted benzothiazol-2′-ylimino)-4-thiazolidones were prepared. Their structures and the purity of the compounds were corroborated by their analytical and spectral data. Screening tests on these compounds showed the 4-chloro and 6-bromo analogues to be the most active as CNS depressants, muscle relaxants and anticonvulsants.
cis-2-Pentenyl Moiety from 5,6-Dihydro-2H-thiopyran. A Convenient Synthesis of cis-Jasmone
Authors: Torii Sigeru , Tanaka Hideo , Tomotaki Yoshihisa 
Published: July 2006

Abstract
A method for the synthesis of cis-jasmone from 5,6-dihydro-2H-thiopyran is described. Formation of cis-2-pentenyl moiety was achieved by reductive desulfurization of the 2H-thiopyran derivative obtained by the alkylation of 5,6-dihydro-2H-thiopyran with epichlorohydrin.
Metal Phosphinylides and Phosphinothioylides. VII. The Structure of [Ph2PX]M (X=O, S) in Solution and Their Disproportionation
Authors: Goda Koshiro , Gomi Hideyuki , Yoshifuji Masaaki , Inamoto Naoki 
Published: July 2006

Abstract
The species [Ph2PO]M in THF were found to exist as Ph2P–O–M by 31P-NMR, and [Ph2PS]MgCl as Ph2P–S–MgCl by Raman spectrum. The species [Ph2PS]M undergo easy disproportionation by heating.
An ESR Study of the 4,4′-Difluorobiphenyl Cation Radical
Authors: Nemoto Fujito , Ishizu Kazuhiko , Shimoda Fumio 
Published: July 2006

Abstract
The ESR spectra of the 4,4′-difluorobiphenyl cation show resolved second-order splittings and a marked line-broadening attributable to the modulation of the 19F anisotropic hyperfine interactions by the tumbling motion. This dipolar broadening is mainly observed for the lines associated with the triplet state (I=1) of the two equivalent 19F nuclei. When the temperature is lowered, the wings of the triplet due to the two 19F and the downfield second-order components become broad and finally disappear. The dipolar contributions to the line widths are calculated as a function of the correlation time for the molecular motion, τ2. Furthermore, the ESR observation of the 13C hyperfine structures is carried out, and the spin densities on each ring carbon and the fluorine atoms are experimentally determined. From the spin densities thus determined, the parameters in the equation
a_F=Q_CF^Fρ_C^π+Q_F(FC)^Fρ_F^π,
in which the 19F hyperfine coupling constant is correlated to the π spin densities on the fluorine atom and the adjacent carbon atom, are estimated to be QCFF=39 and QF(FC)F=324 G.
Radiation-induced Phase Transformations in NdNb1−xVxO4
Authors: Kenjo Tadao , Yajima Seishi 
Published: July 2006

Abstract
When NdNb1−xVxO4 compounds were exposed to a fast neutron dose of 6.6×1018 nvt, their monoclinictetragonal transition temperatures were lowered; particularly the transition temperature for the compound with x=0.3 was lowered to a temperature below room temperature. The lowering of the transition temperatures was greater for samples containing more V5+ ions. Although the present work does not fully reveal why neutronirradiation lowers the transition temperature, it does show that neither the internal stress due to radiation damage nor the change in valency state of Nb5+ or Nd3+ lowers the transition temperature.
A Study of Catalysis by Metal Phosphates. IV. The Alkylation of Phenol with Methanol over Metal Phosphate Catalysts
Authors: Nozaki Fumio , Kimura Isao 
Published: July 2006

Abstract
The catalytic methylation in the vapor phase over various metal phosphates has been investigated using a conventional flow reactor at temperatures ranging from 350 to 500 °C under atmospheric pressure. The Ca3(PO4)2 catalyst was excellent in both its activity and its selectivity for ortho-methylation, giving predominantly o-cresol and 2,6-xylenol, whereas the BPO4 or CaHPO4 catalyst simultaneously promoted the formation of anisole. The activity of Ca3(PO4)2 was significantly higher than that of the CaO or MgO catalyst. The influences of the reaction temperature, the contact time, and the calcination temperature of the catalyst upon the conversion of phenol, and the yields of the products were investigated in detail over the Ca3(PO4)2 catalyst. The activities and the selectivities of various catalysts were discussed in connection with their acid-base properties. The mechanism of the participation of both the acidic and basic sites in the methylation was also discussed.
Photoemission from Anthracene and Compounds Containing Anthracene-ring Systems
Authors: Hino Shojun , Hirooka Tomohiko , Inokuchi Hiroo 
Published: July 2006

Abstract
The Photoemission from the organic compounds containing anthracene rings—anthracene, 9-methyl-anthracene, 9,10-dichloroanthracene and 9,9′-bianthryl—was measured. The photoelectron energetic responses of all these compounds were nearly the same. The resemblance of the photoelectron energy distribution curves and the spectral dependence of the quantum yield revealed the coincidence of the electronic structures of these compounds in a solid. The comparison between solid- and gas-phase photoelectron spectra showed that the optical excitation process is the most characteristic one in photoemission phenomena.
The Microwave Spectrum of Dichlorodifluoromethane
Authors: Takeo Harutoshi , Matsumura Chi 
Published: July 2006

Abstract
The microwave spectra of three isotopic species of dichlorodifluoromethane have been observed, and the following rotational constants have been obtained:
& A=4118.90 MHz, B=2638.70 MHz, C=2233.72 MHz for ^12C^35Cl_2F_2
& A=4092.07 MHz, B=2582.30 MHz, C=2185.54 MHz for ^12C^35Cl^37ClF_2
& A=4115.73 MHz, B=2638.95 MHz, C=2232.86 MHz for ^13C^35Cl_2F_2.
The bond lengths and angles determined from them are r(C–Cl)=1.744 Å, r(C–F)=1.345 Å, ∠Cl–C–Cl=112°33′, and ∠F–C–F=106°14′. The nuclear quadrupole coupling constants in the C-Cl bond axis system are χzz=−82.7 MHz and ηbond=0.06.
V-51 and Mn-55 NMR Studies of Metal Carbonyls
Authors: Nakano Taku 
Published: July 2006

Abstract
The metal chemical NMR shifts of metal carbonyls are reported and discussed in relation to the bonding nature characteristic of carbonyl compounds of the M(CO)6- and Mn(CO)5X-types, where M is V or Mn, and X is a halogen or SCN. Theoretically evaluated chemical shift data based upon Ramsey’s expression agree well with those observed for the M(CO)6-type carbonyls. Regarding Mn(CO)5X, the variation of the shifts for halogens is elucidated theoretically and revealed to be dependent upon the π-bonding nature between the metal and the halogen atom.
The Absolute Configuration of the (+)546-β-Oxalato[(6R,8S)-dimethyl-2,5,9,12-tetraazatridecane]cobalt(III) Ion, (+)546-β-[Co(ox)(N,N′-Me2-R,S-2,3″,2-tet)]+
Authors: Yano Shigenobu , Furuhashi Keizo , Yoshikawa Sadao 
Published: July 2006

Abstract
The crystal and molecular structure of (+)546-β-[Co(ox)(N,N′-Me2-R,S-2,3″,2-tet)]+ has been determined from three-dimensional intensity data collected by counter methods. The structure has been refined by least-squares techniques to an R factor of 5.9% for 838 reflections above the background. The red violet crystals are orthorhombic, with a space group of P212121, with Z=4 (Dm=1.501, Dc=1.505 g/cm3), and with cell constants of a=14.175(5), b=18.591(2) and c=7.747(4) Å. The complex ion has the Δ absolute configuration, which was determined by the Bijvoet method. The quadridentate ligand, N,N′-Me2-R,S-2,3″,2-tet), is coordinated to the Co via 4 N atoms in the cis-β configuration, yielding two terminal 5-membered chelate rings with the λ conformation and a central 6-membered ring with a chair conformation (both C–CH3 groups are equatorial). The secondary N atoms have R chirality except for one terminal N atom, the absolute configuration of which is S. The N(S)–CH3 group in the “out-of-plane” 5-membered ring is equatorial, whereas the N(R)–CH3 group in the other ring has an axial disposition.
The Microwave Spectrum of anti-Acetaldehyde Oxime-d
Authors: Ohashi Osamu , Hara Hisao , Noji Keiko , Sakaizumi Takeshi , Onda Masao , Yamaguchi Ichiro 
Published: July 2006

Abstract
The microwave spectrum of anti-acetaldehyde oxime-d was investigated in the frequency region from 9 to 36 GHz. The rotational transition lines widely split into the A and E species due to the tunneling of the methyl group through the low potential barrier hindering the internal rotation. The transition lines belonging to the A species were fitted to the rigid rotor Hamiltonian, and the following effective rotational constants in MHz were obtained: AA=17250, BA=6284.33, and CA=4704.96. All the observed transition frequencies were fitted to the Hamiltonian containing perturbation terms to the fourth order in order to obtain the internal-rotation parameters using the principal axis method. The potential barrier, V3, hindering the internal rotation was determined to be 373 cal mol−1. The dipole moment was determined to be 0.828 D from the Stark effect of the transitions belonging to the A species.
Relaxation Studies of the Adsorption-Desorption Equilibrium of Surfactants on the Gas-Liquid Interface. I. Theoretical Studies
Authors: Sasaki Minoru , Yasunaga Tatsuya , Tatsumoto Nobuhide 
Published: July 2006

Abstract
A general theory for the propagation characteristics of the capillary wave on the gas-liquid interface, where the physicochemical equilibrium exists, is proposed. The theory is developed on the basis of the two-dimensional relaxation theory and the surface thermodynamics. The relaxation parameters in the equations are closely related to the dynamic behavior of the equilibrium. As an example, the theory was applied to the surfactant solution, taking account of the adsorption-desorption and diffusion processes of the surfactant. The derived equations revealed that the adsorption-desorption process plays an important role in the surfactant transfer between the surface and the bulk phase in a concentrated surfactant solution, while the diffusion process plays such a role in a dilute solution.