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Vol. 81, No. 1 (January, 2008)
[PDF version]
| The Chemical Society of Japan Award for 2006 |
Web Release Date:
January 10, 2008
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| 1-24
Highly Selective Synthetic Reactions by the Combined Use of Organometallic Reagents and Radical Species
K. Oshima
[Full Text PDF(J-STAGE)] Free Access Article
Several new synthetic reactions have been developed: (1) Regio- and stereoselective silylmetalation of acetylenes, (2) triethylborane induced radical reactions and radical cyclization of iodoacetate in water, and (3) organic synthesis with three organometallic ate complexes (R3MnMgBr, R3MgLi, and R3Co(L2)MgBr).
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| The Chemical Society of Japan Award for Creative Work for 2006 |
Web Release Date:
January 10, 2008
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| 25-59
Studies on the Structure and Function of Phytochromes as Photoreceptors Based on Synthetic Organic Chemistry
K. Inomata
[Full Text PDF(J-STAGE)] Free Access Article
An efficient and flexible synthetic method of phytochrome chromophores was developed. Assembly experiments of the synthetic chromophores with apophytochromes in vitro and in vivo provided us insights into the structure and function of phytochromes as photoreceptors.
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| The Chemical Society of Japan Award for Young Chemists for 2006 |
Web Release Date:
January 10, 2008
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| 60-75
Multimetallic Bifunctional Asymmetric Catalysis Based on Proximity Effect Control
S. Matsunaga* and M. Shibasaki*
[Full Text PDF(J-STAGE)] Free Access Article
Design and applications of various homo- and hetero-multimetallic asymmetric catalysts based on the concept of proximity effect control are described. Strategies in designing suitable multidentate chiral ligands and selecting suitable metal combinations are introduced.
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| Web Release Date:
January 10, 2008
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| 76-83
Isolable Iron(II)–Porphycene Derivative Stabilized by Introduction of Trifluoromethyl Groups on the Ligand Framework
K. Ito, T. Matsuo, I. Aritome, Y. Hisaeda, and T. Hayashi*
[Full Text PDF(J-STAGE)] [Supporting Information] Free Access Article
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Trifluoromethylated iron porphycene μ-oxo dimer was easily converted into the monomeric iron(II) species via the FeIII–O–FeIII bond cleavage upon dissolution in pyridine. The reduction product was quite stable and its structure was successively determined by X-ray crystallographic analysis.
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| Web Release Date:
January 10, 2008
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| 84-90
Multi-Frequency ESR Studies on Low-Dimensional Antiferromagnets, ζ-(BEDT-TTF)2PF6(THF) and γ-(BEDT-TTF)2PF6
K. Maeda,* T. Hara, K. Furukawa, and T. Nakamura
[Full Text PDF(J-STAGE)]
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Multi-frequency Electron Spin Resonance measurements were performed on ζ-(BEDT-TTF)2PF6(THF) and γ-(BEDT-TTF)2PF6. Anomalous temperature and frequency dependence of the ESR linewidth was observed for γ-(BEDT-TTF)2PF6. The spin correlation in these salts is discussed in relation to the magnetic and structural dimensionality.
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| Web Release Date:
January 10, 2008
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| 91-102
Theoretical Studies on Electronic Structures and Chemical Indices of the Active Site of Oxygenated and Deoxygenated Hemerythrin
Y. Takano,* H. Isobe, and K. Yamaguchi
[Full Text PDF(J-STAGE)] [Supporting Information]
The origin of the magnetic couplings, the nature of the chemical bond, and the mechanism of the dioxygen binding of the active site of hemerythrin were examined with an appropriate theoretical method and realistic models.
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| Web Release Date:
January 10, 2008
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| 103-109
Photoinduced Electron-Transfer and Electron-Mediating Processes of Fullerenes and Phenothiazine Oligomers in a Polar Solvent
D.-M. S. Islam, Y. Sasaki, H. Kawauchi, M. Kozaki, Y. Araki,* O. Ito, and K. Okada*
[Full Text PDF(J-STAGE)]
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Photosensitizing electron-transfer/electron-mediating systems were established between C60/C70 and (PTZ)n via 3C60*/3C70* in the presence of viologen dication and an appropriate hole shifter. In addition, the structures of (PTZ)n•+ generated through the photoinduced electron-transfer processes were elucidated.
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| Web Release Date:
January 10, 2008
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| 110-112
Ab Initio MO-MD Simulation Based on the Fragment MO Method. A Case of (−)-Epicatechin Gallate with STO-3G Basis Set
K. Tamura, T. Watanabe, T. Ishimoto, and U. Nagashima*
[Full Text PDF(J-STAGE)]
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We performed ab initio MO-MD simulation based on the fragment MO method using the (−)-epicatechin gallate in order to examine the efficiency of fragmentation pattern in comparison with conventional MO-MD. We clearly demonstrated that the FMO-MD simulation is sufficient for determining the trajectory of the total energy and the geometry difference.
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| Web Release Date:
January 10, 2008
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| 113-115
Detection of Group-in Complexes with Water-Soluble p-Sulfonatocalix[8]arene on Addition of Alkali Salts by Using Electron Spin Resonance Spectroscopy
Y. Sueishi,* K. Miyazono, M. Negi, and Y. Kotake
[Full Text PDF(J-STAGE)]
The change in ionic strength of the solution appeared to drive the functional group of the probe deep into the calixarene cavity, making it possible to detect group-in complexes by using ESR spectroscopy.
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| Web Release Date:
January 10, 2008
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| 116-119
Extractive Spectrophotometric Determination of Tungsten(VI) as Its 6-Chloro-3-hydroxy-2-(2′-thienyl)-4-oxo-4H-1-benzopyran Complex
R. Agnihotri, N. Agnihotri, and J. R. Mehta*
[Full Text PDF(J-STAGE)]
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6-Chloro-3-hydroxy-2-(2′-thienyl)-4-oxo-4H-1-benzopyran [CHTB] formed a yellow-colored (1:3) complex with tungsten(VI), which was extracted into chloroform from 0.16–0.32 mol dm−3 HCl solutions. The complex showed an absorption maximum at 417–423 nm (figure curve A: WVI complex (2 μg cm−3) studied against reagent blank, curve B: reagent blank against pure chloroform). The absorbance followed Beer′s law in the range of 0–3.0 μg of Wcm−3, and a molar absorptivity of 4.05× 104 dm3 mol−1 cm−1 and a stability constant of 7.34× 1011 were obtained.
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| Web Release Date:
January 10, 2008
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| 120-126
Single Particle Analysis of Secondary Organic Aerosols Formed from 1,4-Cyclohexadiene Ozonolysis Using a Laser-Ionization Single-Particle Aerosol Mass Spectrometer
M. Narukawa, Y. Matsumi,* J. Matsumoto, K. Takahashi, A. Yabushita, K. Sato, and T. Imamura
[Full Text PDF(J-STAGE)]
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Real-time analysis of secondary organic aerosol (SOA) particles formed from 1,4-cyclohexadiene ozonolysis was performed using a laser-ionization single-particle aerosol mass spectrometer. Intense peaks in negative-ion mass spectra suggest that chemical compositions of the SOA particles vary with the particle size.
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| Web Release Date:
January 10, 2008
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| 127-135
Synthesis, Crystal Structure, and Chromotropic Properties of Mixed-Ligand Nickel(II) Complexes with 1,3-Diketonate and P–N Bidentate Ligands
M. Arakawa, N. Suzuki, S. Kishi, M. Hasegawa, K. Satoh, E. Horn, and Y. Fukuda*
[Full Text PDF(J-STAGE)]
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Solvatochromic and thermochromic behaviors of nickel(II) complexes containing P–N bidentate ligand were investigated by spectroscopic analysis in solvents with different donor number at varying temperature.
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| Web Release Date:
January 10, 2008
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| 136-141
Electronic Properties in a Five-Coordinate Azido Complex of Nonplanar Iron(III) Porphyrin: Revisiting to Quantum Mechanical Spin Admixing
S. Neya,* A. Takahashi, H. Ode, T. Hoshino, A. Ikezaki, Y. Ohgo, M. Takahashi, Y. Furutani, V. A. Lórenz-Fonfría, H. Kandori, H. Hiramatsu, T. Kitagawa, J. Teraoka, N. Funasaki, and M. Nakamura
[Full Text PDF(J-STAGE)]
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An iron-bound azido ligand in a ruffled iron(III) porphyrin complex was found to exhibit two IR bands, suggesting that the S=5/2 and 3/2 spin-isomers are in thermal equilibrium with a minimum lifetime of 0.4 ps.
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| Web Release Date:
January 10, 2008
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| 142-147
Copper-Catalyzed Intermolecular Generation of Ammonium Ylides with Subsequent [2,3]Sigmatropic Rearrangement. Efficient Synthesis of Bifunctional Homoallylamines
K. Honda,* H. Shibuya, H. Yasui, Y. Hoshino, and S. Inoue
[Full Text PDF(J-STAGE)]
The copper-catalyzed [2,3]sigmatropic rearrangement of allylic ammonium ylides, which were generated by the reaction of N,N-dimethyl-1-alkyl-2-methylallylamines, derived from terpene alcohols, with diazo compounds, gave trisubstituted E-olefins in one-pot. In addition, the substituent effect at the 2-position of N,N-dimethylallylamine was investigated.
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| Web Release Date:
January 10, 2008
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| 148-159
A Versatile, Practical, and Inexpensive Reagent, Pyridine-3-carboxylic Anhydride (3-PCA), for Condensation Reactions
S. Funasaka and T. Mukaiyama*
[Full Text PDF(J-STAGE)]
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A highly useful method for the preparation of carboxylic esters and carboxamides from various carboxylic acids was established by using pyridine-3-carboxylic anhydride (3-PCA) in the presence of 4-(dimethylamino)pyridine. These reactions proceeded smoothly under mild conditions by using simple experimental procedure.
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| Web Release Date:
January 10, 2008
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| 160-162
Efficient Oxidative Coupling of Thiols into Disulfides Using N-tert-Butyl-N-chlorocyanamide
V. Kumar and M. P. Kaushik*
[Full Text PDF(J-STAGE)]
Reaction of aliphatic/aromatic/heterocyclic thiols with N-tert-butyl-N-chlorocyanamide in presence of sodium bromide is described. The reaction was very rapid and resulted in the formation of disulfides in excellent yields under mild conditions.
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| Web Release Date:
January 10, 2008
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| 163-167
Discotic Liquid Crystals: Synthesis and Characterization of Radial Polyalkynylbenzene Derivatives
S. K. Varshney,* H. Takezoe, and D. S. S. Rao
[Full Text PDF(J-STAGE)] [Supporting Information]
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New radial polyalkynylbenzene derivatives, which consist of 4-phenylacetylene unit connected with a central phenyl, phenoxy, or tolyl linking moiety, are presented. The hexaalkynylbenzene derivatives in a pure form showed a columnar mesophase, and the pentaalkynylbenzene and pentaalkynyltoluene derivatives remained in the highly viscous liquid state even at room temperature, whereas the D–A complexes showed a columnar hexagonal mesophase.
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| Web Release Date:
January 10, 2008
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| 168-170
Hydrosilanes as Reducing Reagents of Copper Salts into Copper Metal Particles under Remarkably Mild Conditions
M. Takahashi, J. Kamada,* K. Iwata, K. Goto, H. Watanabe, and S. Tamai
[Full Text PDF(J-STAGE)]
Copper nanoparticles were synthesized using hydrosilanes as the reducing agent. The reaction smoothly occurred under remarkably mild conditions, i.e., room temperature. The reaction depended on the counter anions of the copper salts and the structure of the hydrosilanes.
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