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Vol. 82, No. 12 (December, 2009)
[PDF version]
Web Release Date: December 10, 2009
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| 1447-1469
Molecular Simulations of Photoaddition Selectivity and Chirality in Challenging Photochemical Reactions
K. Somekawa,* Y. Odo, and T. Shimo
[Full Text PDF(J-STAGE)]
Free Access Article
Origins of challenging enantiodifferentiating isomerizations and inversions of cycloaddition regioselectivity at several photoreactions were elucidated by molecular simulation. The energy and stereochemical properties depending on the excited species and on the TS1 are revealing of hydrogen-bondings and the attractive parts.
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Web Release Date: December 10, 2009
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| 1470-1476
Macroscopic Phase Separation in a Tetraethoxysilane–Water Binary Sol–Gel System
K. Kajihara,* S. Kuwatani, R. Maehana, and K. Kanamura
[Full Text PDF(J-STAGE)]
Free Access Article
Dependence of macroscopic gel morphology on solution composition and preparation conditions is examined for a phase separating mixture of tetraethoxysilane and water, a simple gelling system attractive for preparation of monolithic silica xerogels.
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Web Release Date: December 10, 2009
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| 1477-1484
A DFT and CASSCF Study of Photocycloaddition Reactions of Biradicals from 6-Amino-2-(3-thienoyl)-1,4-benzoquinone
G. Sharma, I. Abraham, R. T. Pardasani,* P. V. Bharatam, and T. Mukherjee
[Full Text PDF(J-STAGE)]
Theoretical study of [3 + 2]/[2 + 2] photocycloaddition reactions of 6-amino-2-(3-thienoyl)-1,4-benzoquinone has been undertaken. The mechanism of feasible [3 + 2] photocycloaddition is explored by DFT and CASSCF methods. The key step in the mechanism is the intramolecular H transfer between amino and carbonyl group in the triplet excited state.
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Web Release Date: December 10, 2009
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| 1485-1490
Local Structure around the Amino Group of Glycine Carbamate in Concentrated Aqueous Solutions
Y. Kameda,* Y. Amo, and T. Usuki
[Full Text PDF(J-STAGE)]
 | Neutron diffraction measurements were carried out for 14N/15N isotopically substituted aqueous alkaline 2 mol % glycine solutions absorbing CO2. Information on the intra- and intermolecular structure around the amino nitrogen of the glycine carbamate was obtained. |
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Web Release Date: December 10, 2009
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| 1491-1496
Low-Frequency Isotropic Raman Spectra of Concentrated Aqueous KX (X: Cl, Br, NO3, and SCN) Solutions
Y. Kameda,* M. Ishikawa, Y. Amo, and T. Usuki
[Full Text PDF(J-STAGE)]
 | The totally symmetrical stretching vibrational mode of hydrated K+, K+(H2O)n, was found at $\skew2\tilde{\nu}$ = 160–170 cm−1 by means of low-frequency isotropic Raman spectra observed for concentrated aqueous KCl, KBr, KNO3, and KSCN solutions. |
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Web Release Date: December 10, 2009
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| 1497-1505
Mononuclear Bis(tridentate)-Type and Dinuclear Triple Helicate Iron(II) Complexes Containing 2-Ethyl-5-methylimidazole-4-carbaldehyde Azine
Y. Sunatsuki,* H. Maruyama, K. Fujita, T. Suzuki, M. Kojima,* and N. Matsumoto
[Full Text PDF(J-STAGE)]
[Supporting Information]
Mononuclear and dinuclear triple helical iron(II) complexes with 2-ethyl-5-methylimidazole-4-carbaldehyde azine (H2L2-Et-5-Me) were prepared and their magnetostructural relationships were studied. [Fe(H2L2-Et-5-Me)2](ClO4)2·CH3OH was intrinsically in the HS state, while [Fe2(H2L2-Et-5-Me)3](ClO4)4·H2O exhibited a [LS–HS] ↔ [HS–HS] spin transition.
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Web Release Date: December 10, 2009
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| 1506-1509
197Au Mössbauer Spectroscopic Studies of Cyclometalated Gold Dimers Containing 2-C6F4PPh2 Ligands
M. A. Bennett,
N. Mirzadeh,
S. H. Privér,
M. Takahashi,
and
S. K. Bhargava*
[Full Text PDF(J-STAGE)]
197Au Mössbauer spectra have been measured on a series of dinuclear gold complexes containing the 2-C6F4PPh2 ligand. The correlation plot indicates that the electron densities of gold atoms in these complexes are less than those of their protio analogues.
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Web Release Date: December 10, 2009
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| 1510-1513
Catalytic Electrosynthesis in Ionic Liquid: Performance of Nickel–(2,2′-Bipyridine) Complexes for Production of Aryl Propan-2-ones
R. Barhdadi,* H. Maekawa, C. Comminges, and M. Troupel
[Full Text PDF(J-STAGE)]
The electroreductive coupling of a benzylic halide ArCH2Cl with an acyl donor (Ac2O or AcCl) reagent can afford a good method to obtain aryl propan-2-ones in an ionic liquid.
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Web Release Date: December 10, 2009
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| 1514-1519
Fluorescent Dyes with 2-Amino-4,7-diazaindole Skeleton: Synthesis and Spectroscopy
D. T. Gryko,* J. Piechowska, V. Vetokhina, and D. Wójcik
[Full Text PDF(J-STAGE)]
 | The condensation of DBU with compounds possessing a 2,3-dichloropyrazine moiety has been studied. Spectroscopic properties of synthesized fluorescent dyes were investigated and analyzed. The dye formed from 5,6-dichloro-2,3-dicyanopyrazine exhibits a very large Stokes shift. |
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Web Release Date: December 10, 2009
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| 1520-1527
Asymmetric Synthesis of Hydroisoquinoline Derivatives, a Key Intermediate for Manzamine Synthesis, by Diels–Alder Reaction Using 4-Amino-2-siloxybutadiene
Y. Mihara, T. Matsumura, Y. Terauchi, M. Akiba, S. Arai, and A. Nishida*
[Full Text PDF(J-STAGE)]
A novel method for the synthesis of chiral hydroisoquinolines by asymmetric Diels–Alder reaction of nitrogen-containing dienophiles and suitably protected aminosiloxybutadienes, have been developed.
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Web Release Date: December 10, 2009
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| 1528-1532
Synthesis of (S)-Ketamine via [1,3]-Chirality Transfer of a Stereocenter Created by Enantioselective Aldol Reaction
T. Yokoyama, R. Yokoyama, S. Nomura, S. Matsumoto, R. Fujiyama, and S. Kiyooka*
[Full Text PDF(J-STAGE)]
The second asymmetric synthesis of (S)-ketamine has been achieved (87% ee) via allyl cyanate–isocyanate rearrangement from the intermediate alcohol, created by enantioselective oxazaborolidinone-promoted aldol reaction.
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Web Release Date: December 10, 2009
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| 1533-1537
The Effects of Primary Structures on Photo-Induced Insolubilization of All-Cis Poly( p-phenylenevinylene)s in Thin Films
Y. Mutoh, Y. Yamamoto, M. Wakioka, R. Takita, J. Nakamura, T. Iida, and F. Ozawa*
[Full Text PDF(J-STAGE)]
 | All-cis PPVs prepared by Suzuki–Miyaura-type polycondensation undergo photo-induced insolubilization in thin films, along with cis-to-trans isomerization of vinylene linkages to give all-trans PPVs. This phenomenon has been investigated in detail, using all-cis and all-trans PPVs with a range of molecular weights and terminal structures. It has been found that the all-cis configuration serves as a particularly important factor. |
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Web Release Date: December 10, 2009
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| 1538-1547
Biomass Carbon Ratio of Biomass Chemicals Measured by Accelerator Mass Spectrometry
M. Funabashi,* F. Ninomiya, M. Kunioka, and K. Ohara
[Full Text PDF(J-STAGE)]
Open Access Article
Biomass carbon ratios of various chemicals from biomass and petroleum were evaluated by radioisotope 14C measurement using accelerator mass spectrometry (AMS). Sample preparations of liquids, gases, and carbonates for the AMS were developed and confirmed.
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