bluuebunny/crossref_metadata_2025_split huggingface dataset:
Molecular Structures of Adducts of Benzoyl Isothiocyanate and Hydrazones Determined by the X-Ray Diffraction Method
Authors: Fukutani Yasuhide , Tsukihara Kumiko , Okuda Yukio , Fukuyama Keiichi , Katsube Yukiteru , Yamamoto Iwao , Gotoh Haruo 
Published: July 2006

Abstract
X-Ray diffraction analysis was used to establish the molecular structures of some adducts of benzoyl isothiocyanate with hydrazones: benzaldehyde 4-benzoyl-2-phenylthiosemicarbazone (1), 2-benzoylimino-3,5-diphenyl-2,3-dihydro-1,3,4-thiadiazole (2), and 5-benzoylimino-2,2-dimethyl-4-phenyl-1,3,4-thiadiazolidine (3). In adducts 2 and 3, a strong intramolecular interaction between sulfur and carbonyl oxygen atoms has been found. The S…O distance is 2.56 Å for 2 and 2.76 Å for 3, and the oxygen atom lies approximately in the plane defined by the sulfur atom and the two carbon atoms bonded to the sulfur atom. The absence of a characteristic absorption due to a carbonyl group in the IR spectra of 2 and 3 reflects the intramolecular interaction. The crystal of 1 is triclinic, space group P\barl, with a=12.041, b=8.414, c=11.298 Å, α=116.13, β=103.39, γ=103.27°; that of 2 is monoclinic, space group P21/c, with a=20.842, b=3.977, c=21.120 Å, β=103.55°; and that of 3 is monoclinic, space group P21 with a=12.559, b=6.910, c=10.283 Å, β=115.46°. The structure has been refined by the block-diagonal least-squares method to R=0.089 with 2508 reflections for 1, to R=0.088 with 1872 reflections for 2, and to R=0.098 with 1031 reflections for 3.
Crystal Structures of Mixed Ligand Copper(II) Complexes Containing l-Amino Acids. I. l-Asparaginato-l-histidinato-copper(II) and Its Hydrate
Authors: Ono Taizo , Shimanouchi Hirotaka , Sasada Yoshio , Sakurai Takeshi , Yamauchi Osamu , Nakahara Akitsugu 
Published: July 2006

Abstract
Two copper complexes containing l-histidine and l-asparagine crystallize from aqueous solution at pH 7.0. Both crystals are monoclinic, space group P21. l-Asparaginato-l-histidinatocopper(II): a=10.913(3), b=12.911(4), c=10.206(3) Å, β=113.83(2)°, Z=4. l-Asparaginato-l-histidinatoaquacopper(II) trihydrate: a=12.654(4), b=11.623(4), c=5.931(2) Å, β=100.47(3)°, Z=2. In both structures, four coordinating atoms in an approximately planar arrangement around copper are the α-amino and imidazole δ-nitrogen atoms of l-histidine and α-amino nitrogen and α-carboxyl oxygen of l-asparagine. The fifth coordination site is occupied by the α-carboxyl oxygen of l-histidine. Difference between the two complex crystals is found at the sixth coordination site; a water molecule is coordinated in the hydrated crystal to complete a distorted octahedral environment, while in the anhydrous crystal this site is unoccupied so that the geometry of the complex is square-pyramidal.
Calculations of the Solvent Effects on Some Nitrogen Chemical Shifts
Authors: Ando Isao , Jallali-Heravi M , Kondo Masahiro , Watanabe Shosuke , Webb G A 
Published: July 2006

Abstract
Nitrogen screening constants are calculated by the sum-over-states method using INDO/S parameters and by the finite perturbation procedure employing INDO parameters. The solvaton model is employed to describe changes in nuclear screening as a function of the dielectric constant of the medium. The calculated variations of nitrogen screening are in reasonable agreement with the available experimental data. The effects on screening of hydrogen bonding are included in the sum-over-states calculations by means of dimer models.
The Halomercury(II)-assisted Aquation of the Bromopenta-cyanocobaltate(III) Anions
Authors: Iida Masayasu , Yamatera Hideo 
Published: July 2006

Abstract
The aquation of the bromopentacyanocobaltate(III) ion was carried out in the presence of several kinds of hard acids or halomercury(II) complexes. The hard acids(H+, Na+, and Mg2+) had small effects, while the addition of mercury(II) halides significantly accelerated the aquation. The effect of mercury(II) halides was attributed to the monohalomercury(II) cations, which were formed in a small amount by the dissociation of the dihalomercury(II) complexes. The effect of the dihalomercury(II) complexes was also studied in the presence of an excess of sodium halide. The rate constant for halomercury(II)-assisted aquation was expressed by:
k obsd=k0+k1[HgX+]+k2[HgX2], X−=Cl−,Br−.
The values of k1 and k2 obtained (k1=1.6×104 mol−1 dm3 s−1, k2=1.0 mol−1 dm3 s−1, for X−=Cl−; k1=2.0×104 mol−1 dm3 s−1, k2=1.6×10−1 mol−1 dm3 s−1, for X−=Br−) were compared with the stability constants for the mercury(II) complexes formed by the combination with Br−.
The Isolation of 227Ac from 231Pa and the Gamma-ray Spectra of 231Pa, 227Th, and 223Fr
Authors: Mitsugashira Toshiaki , Yamana Hajimu , Suzuki Shin 
Published: July 2006

Abstract
A method for the isolation of 227Ac and its daughter nuclides from 231Pa was established. The γ-ray spectra of 231Pa, 227Th, and 223Fr were investigated, and the γ-ray tables of these nuclides were presented. A decay scheme of 223Fr was corrected so as to explain these γ-ray data.
Region of Formation of Iron(III) Hydrogen Orthophosphate and Structural Changes in Humid Atmospheres
Authors: Tsuhako Mitsutomo , Oyama Chinuyo , Matsuo Tsuneo , Motooka Itaru , Kobayashi Masamitsu 
Published: July 2006

Abstract
The conditions of formation of the A and B forms of Fe(H2PO4)3 by the reaction of Fe2O3 and H3PO4 have been established, and the thermal changes and structural changes in humid atmospheres investigated. 1) The A and B forms of Fe(H2PO4)3 were readily formed by secondary heat treatment at 150 °C and 125 °C, respectively. 2) The forms of Fe(H2PO4)3 were largely dependent on the heating rate in the primary heat treatment, i.e., at a mean heating rate less than 7 °C/min the A form predominated, whereas above 60 °C/min the B form predominated. A heating rate between 7 and 60 °C/min gave a mixture of the A and B forms. 3) A close relationship between the water content of the primary product and yields of the A and B forms of Fe(H2PO4)3 was found, i.e., only the B form was obtained when the water content of the primary product was less than 7%, while the A form was readily formed when the water content was greater than 11%. 4) Heating the primary product under various degrees of humidity enabled the formation of Fe(H2PO4)3 to be investigated. The effect of heating atmosphere was small except under vacuum. 5) The structural changes of the A and B forms of Fe(H2PO4)3 under several humid atmospheres are summarized as follows:
(Remark: Graphics omitted.)
Solvation of Anions in Solvent Mixtures as Deduced from the Rates of the Finkelstein Reaction
Authors: Kondo Yasuhiko , Nishikata Akira , Yoshioka Akiteru , Tokura Niichiro 
Published: July 2006

Abstract
The Finkelstein reaction has been studied in five dipolar aprotic–dipolar aprotic solvent mixtures and one protic-dipolar aprotic solvent mixture. The theoretical equations for the rate constant as a function of solvent composition derived previously have been reformulated in terms of the solvent exchange model on the solvation site, taking into account the two main features of solvation: the number of the solvation sites on the solvent molecule and the equilibrium constant for the solvent exchange process. The results obtained previously, together with present results, are comprehensively discussed and the solvent mixtures are classified into four groups from the viewpoint of solute-solvent interaction in the region near the ion, using derived theoretical equations.
Effect of Complexation by Crown Ethers on Anisochrony of Diastereotopic Groups in NMR Spectra
Authors: Ando Nobuharu , Yamamoto Yukio , Oda Jun’ichi , Inouye Yuzo 
Published: July 2006

Abstract
Anisochrony of geminal methyls in alkylamines bearing a chiral center in the molecule is affected by complexation with crown ethers, which amplify the chemical shift non-equivalence in NMR. The resolved signal of gem-methyls in valine methyl ester were unequivocally assigned to pro-R and pro-S methyl groups respectively.
Phenanthro[4,5-bcd]furan Derivatives. V. The Cyclization of (Dibenzofuran-1-yl)acetic Acid Derivatives
Authors: Horaguchi Takaaki , Abe Teishiro 
Published: July 2006

Abstract
The cyclization of (6-methoxy-1,2,3,4-tetrahydrodibenzofuran-1-yl)acetic acid (3b) and (6-methoxy-1,2,3,4,4a,9b-hexahydrodibenzofuran-1-yl)acetic acid (5) to the corresponding phenanthro[4,5-bcd]furans have been examined. The cyclization of 3b was difficult, while that of 5 was easy. The difficult cyclization of 3b has been attributed to strains in the reaction intermediate.
A Convenient Method for the Preparation of 4-(3-Halogenatedphenyl)-and 4-(3,5-Dihalogenatedphenyl)-4-oxobiityric Acids
Authors: Jojima Teruomi , Takeshiba Hideo , Kinoto Takao 
Published: July 2006

Abstract
Various 4-(3-halogenatedphenyl)- and 4-(3,5-dihalogenatedphenyl)-4-oxobutyric acids were synthesized by the nuclear halogenation of the corresponding 4-aryl-4-oxobutyric acids in the presence of an excess of aluminum chloride. In most of these reactions, consecutive succinoylation and halogenation of the aromatic compounds were carried out in one pot operation.
The Polymerization of β-Propiolactone by Calcined Synthetic Hydrotalcite
Authors: Nakatsuka Takuo , Kawasaki Hitoshi , Yamashita Shinzo , Kohjiya Shinzo 
Published: July 2006

Abstract
The calcination of synthetic hydrotalcites of different compositions gave aluminium magnesium double oxides with strong basic sites and a high catalytic activity towards the polymerization of β-propiolactone. The strong basic sites were determined and compared with the apparent polymerization rates, suggesting that the strong basic sites are active sites towards the reaction.
On the Phase Transitions in Ammonium Hexafluoroaluminate(III)
Authors: Moriya Keiichi , Matsuo Takasuke , Suga Hiroshi , Seki Syûzô 
Published: July 2006

Abstract
The heat capacities of (NH4)3[AlF6] were measured between 11 and 300 K with an adiabatic calorimeter. Two anomalies were found at (193.0±0.3) K and (220.79±0.05) K. The enthalpy and entropy of the phase transitions are (790±150) J mol−1 and (4.2±0.8) J K−1 mol−1 for the former, and (4030±150) J mol−1 and (18.5±0.7) J K−1 mol−1 for the latter, respectively. The total anomalous entropy, (22.7±1.5) J K−1 mol−1, is in agreement with R In 16=23.05 J K−1 mol−1 predicted by a model involving orientational disorder of the hexafluoroaluminate(III) and the ammonium ions. Discontinuities in fluorine T1 and T1ρ at 221 K by pulse NMR measurement also support this model. The potential barrier height of the hindered rotation of the NH4+ ion was estimated to be 7 kJ mol−1 from the heat capacity data. The intermediate phase undercooled and coexisted with the low temperature phase in a limited range of temperature. The upper phase transition is of the first order but the anomalous heat capacity follows the Landau theory of the phase transitions of the second kind. The high symmetry of the crystal structure of the present crystal at room temperatures in comparison with that of the alkali cryolites was discussed in terms of the hydrogen bonding, molecular disorder and packing consideration.
Molecular Structure of Trimethylphosphine-boron Trichloride by Gas Electron Diffraction
Authors: Iijima Kinya , Shibata Shuzo 
Published: July 2006

Abstract
The molecular structure of trimethylphosphine-boron trichloride (CH3)3P·BCl3 has been determined from gas electron-diffraction data. The structure parameters and uncertainties are rg(P–B)=1.941(16) Å, rg(B–Cl)=1.851(7) Å, rg(C–P)=1.800(4) Å, rg(C–H)=1.099(5) Å, rg(Cl…Cl)=3.022(5) Å, and rg(C…C)=2.936(10) Å. The potential barrier about the P–B axis is 3.8±0.7 kcal mol−1 in the gas phase. The data show that the molecular structure in the gas phase is nearly equal to that in the solid phase.
The Reaction of Recoil 35S Atoms with Organic Compounds. II. The Insertion Reaction of Recoil 35S Atoms into the C–H and C–C Bonds in Ethane in the Gas Phase
Authors: Niisawa Kazuhiro , Taki Ko 
Published: July 2006

Abstract
The sulfur atoms produced by the nuclear transformation of 35Cl(n,p)35S were allowed to react with gaseous ethane in the presence or in the absence of radical scavengers. The products were hydrogen sulfide, methanethiol, ethanethiol, dimethyl sulfide, and other sulfur-containing compounds. The yield of the C–H insertion product (ethanethiol) increased upon the addition of a small amount of the scavenger and then decreased with an increase in the amount of the scavenger to give a constant value, but the yield of the C–C insertion product (dimethyl sulfide) did not vary. The increase in the ethanethiol yield at low concentrations of the scavenger may be ascribed to a protective effect by the scavenger. By the addition of ethanethiol before thermal-neutron irradiation, the yield of ethanethiol was increased, but that of dimethyl sulfide was not increased, therefore the primary yield of ethanethiol could be determined. The spin state of the reactive sulfur atoms in the thermalinsertion reaction was also estimated to be the 3P state upon the addition of COS and C2H4.
Heteropolyanions of Methylarsonate and Dimethylarsinate: The Crystal Structures of Guanidinium Hexamolybdomethylarsonate Hexahydrate, (CN3H6)2[CH3AsMo6O21(H2O)6]·6H2O and Guanidinium Tetramolybdodimethylarsinate Monohydrate, (CN3H6)2[(CH3)2AsMo4O14(OH)]·H2O
Authors: Matsumoto Kazuko Y 
Published: July 2006

Abstract
The crystal and molecular structures of polymolybdo complexes of methylarsonate and dimethylarsinate have been determined by the X-ray diffraction technique. The crystal of (CN3H6)2[CH3AsMo6O21(H2O)6]·6H2O is trigonal, with the space group R3 and the cell dimensions of a=9.653(6) Å, α=87.01(15)°, and Z=l. The anion is an assemblage of six MoO6 octahedra and a tetrahedral CH3AsO3 group. The six MoO6 octahedra constitute a ring with alternate edge- and corner-sharing, and the tetrahedral CH3AsO3 group joins the anion, with its three oxygen atoms shared with the ring. Each molybdenum atom has two terminal oxygen atoms in the cis position and is coordinated by one water molecule. (CN3H6)2[(CH3)2AsMo4O14(OH)]·H2O crystallizes in the space group P21/c of the monoclinic system, with the cell dimensions of a=8.530(5), b=8.532(4), c=30.121(15) Å, β=95.50(16)°, and Z=4. The Mo4O14(OH) moiety in the [(CH3)2AsMo4O14(OH)]2− anion is formed with two face- and two edge-sharings of MoO6 octahedra into an almost flat rectangle. The oxygen atom located at the center of the anion and bonded to all the four molybdenum atoms is protonated and is, in fact, a hydroxyl group.
The Crystal Structure of Ethylenediaminebis[2-(aminomethyl)pyridine]-cobalt(III) Hexacyanocobaltate(III) Dihydrate
Authors: Sekizaki Masao , Utsuno Shunji 
Published: July 2006

Abstract
The crystal structure of ethylenediaminebis[2-(aminomethyl)pyridine]cobalt(III) hexacyanocobaltate(III) dihydrate, [Co(H2NCH2CH2NH2)(C5H4NCH2NH2)2][Co(CN)6]·2H2O, has been determined by the X-ray diffraction method and subsequently refined by a block-diagonal least-squares method to give R=0.050 for 5238 non-zero reflections. The crystals are triclinic with a space group P\bar1; a=9.034(2), b=17.267(2), c=8.395(2) Å, α=87.1(3), β=96.2(3), γ=104.6(3)°, and Z=2. The crystal is ionic, comprising the [Co(H2NCH2CH2NH2)(C5H4NCH2NH2)2]3+ cation and the [Co(CN)6]3− anion. The complex cation is a slightly distorted octahedron with three five-membered chelate rings in a lel conformation. The two pyridine nitrogen atoms occupy trans positions. Thus, the cation has an approximate twofold axis of rotation. The anion is also a distorted octahedron, with the coordination of CN− through the carbon atom. The cobalt atoms of the anions occupy the special positions. Two cations in the unit cell are connected by these anions through hydrogen bonds to form a three-dimensional network typical of an ionic crystal.
Semiconducting Bis(dialkyldithiocarbamato)copper(III) Cation–TCNQ Radical Anion and –Bis(1,2-dicyano-1,2-ethylenedithiolato)nickel(III) Anion Salts: [Cu(S2CNR2)2]+TCNQ\ewdot and [Cu(S2CNR2)2]+-[Ni(S2C2(CN)2)2]− (R=Et, n-Pr, and n-Bu)
Authors: Yumoto Yoshiji , Tanaka Toshio 
Published: July 2006

Abstract
The title salts were synthesized. Segregated columnar structures of the salts are suggested from their electronic spectra and electrical resistivities; 104–105Ω cm range at 25 °C with activation energies of 0.24–0.33 eV as compact samples.
A Catalytic Effect of Amines on the Reaction of α-Toluenethiol with N,N′-Thiodiphthalimide
Authors: Abe Yasuo , Horii Toyokazu , Kawamura Shun-ichi , Nakabayashi Takeshige 
Published: July 2006

Abstract
In the presence of catalytic amounts of several amines, N,N′-thiodiphthalimide has been allowed to react with α-toluenethiol in benzene and dichloromethane giving N-(benzyldithio)phthalimide. N-(Benzyldithio)phthalimide has been obtained in excellent yields with 2,4-or 2,6-lutidine as the catalyst in benzene.
Reduction of Alloxan by Cyanide Ion. Isolation of Alloxan Radical Anion Salts and Alloxantin
Authors: Endo Takeshi , Kudo Akira , Okawara Makoto 
Published: July 2006

Abstract
Potassium or pyridinium salts of alloxan radical anion were isolated by the one-electron reduction of alloxan monohydrate with potassium cyanide or 1-benzyl 4-cyano-1,4-dihydronicotinamide at room temperature, respectively.
The Rate Constants for H and D-Atom Additions to O2, NO, Acetylene, and 1,3-Butadiene
Authors: Ishikawa Yo-ichi , Sugawara Ko-ichi , Sato Shin 
Published: July 2006

Abstract
Pulse radiolysis has been combined with Lyman-α absorption spectroscopy for the measurement of absolute rate constants for the addition reactions of H and D-atoms to oxygen, nitrogen monoxide, acetylene-d0 and -d2, and 1,3-butadiene at room temperature. The rate constants obtained with O2 and NO were in good agreement with the results previously reported and no H/D isotope effect was found. With acetylenes and 1,3-butadiene, the following rate constants were obtained (units of cm3 molecule−1 s−1): (3.8±0.4)×10−13 for H+C2H2; (2.6±0.2)×10−13 for D+C2H2; (3.8±0.2)×10−13 for H+C2D2; (2.5±0.2)×10−13 for D+C2D2; (8.5±1.5)×10−12 for H+1,3-C4H6; (7.5±0.6)×10−12 for D+1,3-C4H6. These results are compared to previous studies, and the H/D isotope effect discussed.
The Thermal Gas-phase Decomposition of Vinyl Bromide
Authors: Saito Ko , Yokubo Teiji , Fuse Tohru , Tahara Hiroyuki , Kondo Osamu , Higashihara Tetsuo , Murakami Ichiro 
Published: July 2006

Abstract
The thermal gas-phase decomposition of vinyl bromide in Ar has been studied behind reflected shock waves over the temperature range between 1300 and 2000 K and the density range of 5.2×10−6–3.8×10−5 mol cm−3 by monitoring the UV absorption of C2H3Br and the IR emission of HBr. The decomposition proceeds via the molecular elimination of HBr, and the unimolecular process is in the low-pressure region under the present experimental conditions. The low-pressure-limit rate constant was obtained as
k 2nd=1013.98±0.21exp{−(41.5±1.6 kcal mol−1)⁄RT} cm3 mol−1 s−1.
The collision efficiency factor, βc, was obtained as about 2×10−4, considerably lower than that of vinyl chloride.
An X-Ray Diffraction Study on the Structures of Bis- and Tris(ethylenediamine)zinc(II) Complexes in Solution
Authors: Fujita Tadao , Yamaguchi Toshio , Ohtaki Hitoshi 
Published: July 2006

Abstract
An X-ray diffraction study has been carried out at 25 °C for aqueous ethylenediamine(en) solutions of zinc(II) nitrate, the mole ratios, en/Zn, in the solutions being 2.252 and 3.204. In the former solution bis(ethylenediamine)zinc(II) complex existed as the main species, while in the latter tris(ethylenediamine)zinc(II) complex was predominant. The X-ray scattering data of the solution containing the bis-complex showed that four nitrogen atoms within the two ethylenediamine molecules were tetrahedrally coordinated to the zinc(II) ion at a distance of 2.131 (9) Å. The nonbonding Zn…C distance was also determined to be 2.89(2) Å. In the tris-complex in which the zinc(II) ion was coordinated with the six nitrogen atoms, the Zn–N and Zn…C distances were 2.276(5) Å and 3.00(1) Å, respectively. Raman spectra of the solutions supported the structures of the complexes.
Kinetics of the Ligand Substitution Reactions of the Copper(II) Chelates of 1-(2-Pyridylazo)-2-naphthol Analogs with EDTA
Authors: Wada Hiroko , Nakagawa Genkichi 
Published: July 2006

Abstract
The rates of the substitution reactions of copper(II) chelates of metallochromic indicators such as 1-(2-pyridylazo)-2-naphthol (PAN, Hpan), 1-(2-thiazolylazo)-2-naphthol (TAN, Htan), 2-(2-pyridylazo)-4-methylphenol (PAC, Hpac), 2-(2-thiazolylazo)-4-methylphenol (TAC, Htac), 4-(2-pyridylazo)resorsinol (PAR, H2par), and 4-(2-thiazolylazo)resorcinol (TAR, H2tar) were determined. The rate laws can be written as −\fracd[CuL]dt=kedta′CuL [CuL][edta′] for PAN, TAN, PAC, and TAC in the pH range of 4 to 6.5, and −\fracd[(CuL)′]dt=(kedta′CuL[CuL]+kedta′CuHL[CuHL])[edta′], where [(CuL)′]=[CuL]+[CuHL], for PAR and TAR in the pH range of 3.5 to 6.5. In the pH range lower than 3.5 the laws are written as −\fracd[CuL]dt=(kedta′CuL[edta′]+kHCuL[H])[CuL] for PAN, and as −\fracd[CuHL]dt=(kedta′CuHL[edta′]+kHCuHL[H])[CuHL] for PAR and TAR. The rate constants (μ=0.1, 25 °C, at dioxane 2 vol% or 5 vol% (PAN and TAN) (dm3 mol−1 s−1)) are kedta′Cu(tan)=2.8×104, kedta′Cu(pac)=8.0×104, kedta′Cu(tac)=4×106, kedta′Cu(par)=2.0×103, kedta′Cu(tar)=6.3×104, kedta′Cu(Hpar)=1.2×104, kedta′Cu(Htar)=7.9×105, kHCu(pan)=6.5×10, kHCu(Hpar)=6.6×102, and kHCu(Htar)=1.2×104. The rate constants, kedta′CuL are inversely proportional to the basicities of the donor atoms of indicators. Thus, the rate of color change of thiazolylazo compound is larger than that of corresponding pyridylazo compound in the chelatometry of copper(II).
Alkylation of Bromocyclopropanes and Bromoarenes by Means of Dibutylcopperlithium and Alkyl Halides
Authors: Hiyama Tamejiro , Yamamoto Hajime , Nishio Koji , Kitatani Katuzi , Nozaki Hitosi 
Published: July 2006

Abstract
Treatment of bromocyclopropanes with excess dibutylcopperlithium in tetrahydrofuran at −48 °C gives the respective organocopper intermediates which upon quenching with excess alkyl halides afford alkylated cyclo-propanes with retention of the configuration. This process is applied to the synthesis of methyl cascarillate. Bromoarenes are also reduced with dibutylcopperlithium and allylarenes are prepared therefrom.
The Singlet-excitation-energy Migration in an Amorphous-state Film of 1,3-Di(9-carbazolyl)propane
Authors: Itaya Akira , Okamoto Ken-ichi , Kusabayashi Shigekazu 
Published: July 2006

Abstract
The singlet-excitation-energy migration in an amorphous film of 1,3-di(9-carbazolyl)propane(DCzP(a)) was studied by means of a fluorescene-quenching experiment. The results were compared with those of amorphous poly(9-vinylcarbazole)(PVCz) and poly[2-(9-carbazolyl)ethyl vinyl ether] (PCzEVE) films. The numbers of carbazolyl chromophores covered by a singlet exciton during the lifetime were in the following order: DCzP(a)&gt;PCzEVE&gt;PVCz.
Syntheses and Electrical Properties of α,α,α′,α′-Tetracyanodiphenoquinodimethane Complexes
Authors: Morinaga Minoru , Nogami Takashi , Mikawa Hiroshi 
Published: July 2006

Abstract
Two charge-transfer complexes of α,α,α′,α′-tetracyanodiphenoquinodimethane (TCNDQ), i.e., N-methylphenazinium (NMP)–TCNDQ, and N-methylquinolinium (NMQ)–TCNDQ, were synthesized. The electrical resistivities with pressed pellet samples were 7.1×108 Ω cm for NMP+TCNDQ− and 6.9×107 Ω cm for NMQ+TCNDQ−; they are thus much less conductive than the corresponding TCNQ, complexes.
Synthesis of t-2, t-3-Dicarboxy-r-1-cyclopentylacetic Acid
Authors: Obara Heitaro , Kimura Hiroshi , Suzuki Masanobu , Yamada Shigenobu 
Published: July 2006

Abstract
One of the four stereoisomers of 2,3-dicarboxycyclopentylacetic acid, the t-2, t-3, r-1-isomer, has been synthesized from (1RS, 5SR, 6SR)-6-ethoxycarbonylmethyl-3-oxabicyclo[3.3.0]octan-7-one in five steps.