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Vol. 82, No. 5 (May, 2009)
[PDF version]
Web Release Date: May 13, 2009
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| 539-554
Angular Dipyridyl Ligands 2,5-Bis(4-pyridyl)-1,3,4-oxadiazole and Its 3-Pyridyl Analogue as Building Blocks for Coordination Architectures: Assemblies, Structural Diversity, and Properties
M. Du and X.-H. Bu*
[Full Text PDF(J-STAGE)]
Free Access Article
Metallosupramolecular assemblies and properties of multifarious discrete and infinite coordination architectures with two angular dipyridyl-type building blocks are presented.
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Web Release Date: May 13, 2009
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| 555-562
Electrophilic Substitution of Thiophenes with Arylpalladium(II) and Platinum(II) Complexes: Mechanistic Studies on Palladium-Catalyzed CH Arylation of Thiophenes
A. Sugie, H. Furukawa, Y. Suzaki, K. Osakada, M. Akita, D. Monguchi, and A. Mori*
[Full Text PDF(J-STAGE)]
Free Access Article
 | Electrophilic substitution of thiophene derivatives with arylpalladium(II) and platinum(II) complexes was observed. These results suggest palladium-catalyzed CH arylation of thiophenes demonstrated by our group proceeds through electrophilic substitution. |
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Web Release Date: May 13, 2009
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| 563-569
Variation of the Uncoupled OD Stretching Frequency with Electrolyte Concentration in Aqueous Electrolyte Solutions
K. Yonehama, Y. Yoshimura, T. Takekiyo, and H. Kanno*
[Full Text PDF(J-STAGE)]
 | Uncoupled OD stretching spectra were measured for many aqueous electrolyte solutions as a function of electrolyte concentration. There are three types of the variations for the frequencies of the uncoupled OD stretching spectra with R (R = moles of water/moles of electrolyte). |
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Web Release Date: May 13, 2009
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| 570-573
Computational Study of Excited-State Intramolecular-Proton-Transfer of o-Hydroxybenzaldehyde and Its Derivatives
S. Nagaoka,* H. Teramae, and U. Nagashima
[Full Text PDF(J-STAGE)]
[Supporting Information]
The excited-state intramolecular-proton-transfer (ESIPT) of o-hydroxybenzaldehyde and its derivatives (o-formyl-substituted phenols) was studied by means of an ab initio molecular-orbital method. The computational results are consistent with the experimental values and support the nodal-plane model.
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Web Release Date: May 13, 2009
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| 574-581
Electrochemical Oxidation Properties of Tetrakis(tert-butyl)phthalocyaninatozinc(II) in Non-Aqueous Media: A Reinvestigation into the Effects of Stacking, Axial Coordination, and Solvent
M. Morisue,* K. Kameyama, and Y. Kobuke*
[Full Text PDF(J-STAGE)]
[Supporting Information]
The electrochemical oxidation properties of tetrakis(tert-butyl)phthalocyaninatozinc, Zn(t-Bu4Pc) has been reinvestigated for the first systematic exploration. The experimental conditions for the oxidation properties of the monomeric Zn(t-Bu4Pc) species were optimized in CH2Cl2 as a non-coordinating solvent.
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Web Release Date: May 13, 2009
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| 582-584
In Situ Self-Assembly of 1D Copper(II) Coordination Polymer Containing EO Azide and Phenolate Bridges: Crystal Structure and Magnetic Properties
Z. Liu,* W. Han, C. Liu,* X. Di, J. Zhang, and D. Zhang
[Full Text PDF(J-STAGE)]
A novel one-dimensional copper(II) coordination polymer with formula [CuII(L1)(N3)]n (1), has been prepared via in situ self-assembly. Magnetic susceptibility measurement reveals the existence of relatively strong ferromagnetic interactions in the 1D chain.
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Web Release Date: May 13, 2009
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| 585-593
A Facile Preparation of (4-Aminophenyl)(3-guaiazulenyl)methylium Hexafluorophosphate: Comparative Studies on Spectroscopic, Chemical, and Electrochemical Properties of Monocarbenium Ion and p-Benzoquinodimethane Monoiminium Ion Compounds
S. Takekuma,* N. Ijibata, T. Minematsu, and H. Takekuma
[Full Text PDF(J-STAGE)]
The title chemistry of the isolated 3a, with the resonance structure 3c, forming a protonated amino group and the isolated 3b, possessing a 4-methylene-2,5-cyclohexadiene-1-iminium ion structure, is reported.
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Web Release Date: May 13, 2009
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| 594-599
Generation of Diarylcarbenium Ion Pools via Electrochemical C–H Bond Dissociation
M. Okajima, K. Soga, T. Watanabe, K. Terao, T. Nokami, S. Suga, and J. Yoshida*
[Full Text PDF(J-STAGE)]
The “cation pools” of diarylcarbenium ions have been generated by the low-temperature electrochemical oxidation of diphenylmethane derivatives. The generation of the diarylcarbenium ions was confirmed by low-temperature spectroscopic analyses and their reactivity was also investigated.
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Web Release Date: May 13, 2009
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| 600-602
Mechanism of Isomerization and Acid-Induced Transformations of 3′-Hydroxy-4,4′-dimethoxy-3′-methyl-3-oxo-7,7′-bis(piperidinocarbonyloxy)-2,2′-spirobi[2H,2′H,3H,3′H-benzo[b]thiophene]. Unusual Equilibrium between the Spiro and 3-Hydroxybenzothiophene Systems
M. T. Konieczny* and P. Sowiński
[Full Text PDF(J-STAGE)]
[Supporting Information]
Two diastereoisomers of the title compound equilibrate via a 3-hydroxybenzothiophene derivative. The result indicates that the spiro form is more stable than the related, aromatic benzothiophene.
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Web Release Date: May 13, 2009
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| 603-605
Photochemical Properties of 3,3′-Disubstituted Stilbene Dendrimers
K. Kato, A. Momotake, Y. Shinohara, T. Sato, K. Takahashi, R. Nagahata, Y. Nishimura, and T. Arai*
[Full Text PDF(J-STAGE)]
Not only dendrimer surfaces but also substituent positions are important for the photochemistry of new water-soluble stilbene dendrimers.
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Web Release Date: May 13, 2009
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| 606-612
Rapid Crystallization of Mesoporous Silica with Highly Stable 2D-Hexagonal Structure
S. Inagaki, Y. Aratani, S. Nakata, Y. Yashiro, Y. Sekine, E. Kikuchi, and M. Matsukata*
[Full Text PDF(J-STAGE)]
[Supporting Information]
The synthetic parameters of MCM-41, preparing through the evaporation-to-dryness treatment of alkali-free surfactant–silicate mixture, and thier thermal stability and water resistance, have been investigated.
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Web Release Date: May 13, 2009
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| 613-617
Photochemical Reactions in Nanoscopic Organic Domains Generated from Oriented Crystals with Polymers: Nanocrystalline Mosaics as a New Family of Host Materials
Y. Oaki and H. Imai*
[Full Text PDF(J-STAGE)]
[Supporting Information]
The nanocrystalline mosaic structures are organized by the oriented crystals with organic polymers. Photochemical reactions successfully proceed in the organic domains of the nanoscopic space.
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Web Release Date: May 13, 2009
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| 618-623
Microstructural Transformation with Heat-Treatment of Aluminum Hydroxide with Gibbsite Structure
T. Mitsui, T. Matsui, R. Kikuchi, and K. Eguchi*
[Full Text PDF(J-STAGE)]
 | Gibbsite grains with hexagonal prism morphology were prepared from sodium aluminate solution by ordinary procedures. The gibbsite was transformed into laminated morphology by heat treatment above 1200 °C due to the phase transition to α-Al2O3. |
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Web Release Date: May 13, 2009
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| 624-626
Catalytic Behavior of Bis(imino)pyridineiron(II) Complex Supported on Clay Minerals during Slurry Polymerization of Ethylene
Y. Hiyama, Y. Kawada, Y. Ishihama, T. Sakuragi, M. Ohshima, H. Kurokawa,* and H. Miura
[Full Text PDF(J-STAGE)]
[Supporting Information]
 | Bis(imino)pyridineiron(II) complexes supported on montmorillonite and saponite showed high activity for ethylene polymerization. |
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Web Release Date: May 13, 2009
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| 627-629
Bimetallic Effect of Silica-Supported Pt–Ru Catalyst for Hydrogenation of Aromatic Hydrocarbons
T. Arakawa, H. Seki, M. Ohshima, H. Kurokawa, and H. Miura*
[Full Text PDF(J-STAGE)]
 | A drastic synergistic effect has been found for the liquid-phase hydrogenation of aromatic hydrocarbons by the combination of Pt and Ru. The surface composition of the most active catalyst was nearly 50% Pt, suggesting that the Pt–Ru ensemble of a 1-to-1 ratio was active for the hydrogenation reaction. TOF: turnover frequency of naphthalene hydrogenation. |
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