and
Akira Harata
RETRUN to the front page
Copyright (C) 1999 by The Chemical Society of Japan
=============================
Accounts
=============================
GO TO the graphical abstract
GO TO the graphical abstract
=============================
Articles
General and Physical
=============================
GO TO the graphical abstract
GO TO the graphical abstract
and
Akira Harata
GO TO the graphical abstract
Mikio Hoshino,
Shiro Konishi,
Fujio Ebina,
Seigo Yamauchi,
and
Masamoto Iwaizumi*,
GO TO the graphical abstract
GO TO the graphical abstract
GO TO the graphical abstract
GO TO the graphical abstract
Keiju Sawada,
Yuji Ohashi,*
and
Hirotaka Hirata
GO TO the graphical abstract
Yoshiyuki Kuwatani,
and
Masahiko Iyoda
GO TO the graphical abstract
=============================
Articles
Analitical and Inorganic
=============================
GO TO the graphical abstract
and
Kiyoshi Sawada
GO TO the graphical abstract
GO TO the graphical abstract
GO TO the graphical abstract
GO TO the graphical abstract
and
Hitoshi Kamada
=============================
Articles
Orgainc and Biological
=============================
GO TO the graphical abstract
GO TO the graphical abstract
GO TO the graphical abstract
GO TO the graphical abstract
GO TO the graphical abstract
GO TO the graphical abstract
GO TO the graphical abstract
GO TO the graphical abstract
and
Tamejiro Hiyama*,GO TO the graphical abstract
and
Tadamitsu Sakurai*
GO TO the graphical abstract
GO TO the graphical abstract
=============================
Articles
Applied and Materials
=============================
GO TO the graphical abstract
GO TO the graphical abstract
GO TO the graphical abstract
RETRUN to the front page
Copyright (C) 1999 The Chemical Society of Japan
=============================
Accounts
=============================
Copyright (C)
1999 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
72, 2357-2363 (1999) [Vol. 72, No. 11, November, 1999]
Fixation of NO, NO2 , and SO2 gases on octahedral ruthenium clusters has been investigated, wherein NOx gave redox-type and/or partial degradation-type product(s), while examination on reactivity of cluster-bound SO2 revealed its facile and stepwise reduction to SO and further to S ligand with cluster skeletal rearrangement.
Return to the table of contents [next] [category] [top]Copyright (C)
1999 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
72, 2365-2377 (1999) [Vol. 72, No. 11, November, 1999]
[MoH4
(dppe)2
] releases dihydrogen on irradiation or heating to give coordinatively unsaturated intermediates which react with versatile substrates such as methacrylates, allyl carboxylates, 
-diketones, catechols, cyclic imides, amides, and aryl silanes to give oxidative addition products involving specific C-H, C-O, O-H, N-H, and Si-H bond cleavage.
=============================
Articles
General and Physical
=============================
Copyright (C)
1999 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
72, 2379-2382 (1999) [Vol. 72, No. 11, November, 1999]
We have measured positron annihilation lifetime spectra for a series of fluorinated benzene derivatives to study formation and annihilation of ortho
-positronium (o
-Ps) in them. It was found that the o
-Ps lifetimes (
3
) are longer than those expected from the empirical relationship between 3
and the surface tension for hydrocarbons.
Copyright (C)
1999 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
72, 2383-2388 (1999) [Vol. 72, No. 11, November, 1999]
and
Akira Harata
The energy transfer dynamics at gold/NaCl aq (0-0.5 M) interfaces was investigated using our recently developed surface plasmon resonance transient reflecting grating method. We concluded that an ultrafast energy transfer process by hot electrons exists, and that the process is hindered by the adsorbate.
Return to the table of contents [next] [category] [top]Copyright (C)
1999 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
72, 2389-2394 (1999) [Vol. 72, No. 11, November, 1999]
Mikio Hoshino,
Shiro Konishi,
Fujio Ebina,
Seigo Yamauchi,
and
Masamoto Iwaizumi*,
Magnetic properties of the porphyrinato copper(II) cation radical complexes were studied by EPR spectroscopy. It was found that the radical complexes are grouped into two by the 2J and |D | values, It is most likely that these differences are due to the differences, the A1u and A2u types, in the electronic configuration of the porphyrinate cations.
Return to the table of contents [next] [category] [top]Copyright (C)
1999 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
72, 2395-2401 (1999) [Vol. 72, No. 11, November, 1999]
The electronic spectra of three tetrafluorobenzene isomers were observed in a supersonic free jet. These cations were generated by electric discharge and detected through a laser-induced fluorescence technique. The vibrational frequencies of the cations were determined in the electronic ground and the excited D2 states.
Return to the table of contents [next] [category] [top]Copyright (C)
1999 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
72, 2403-2407 (1999) [Vol. 72, No. 11, November, 1999]
A new and simple procedure for counting isomers derived from non-rigid parent molecules has been developed and applied to the enumeration of diphenylmethanes (A = Ph , B = H ), 2,2-diphenylpropanes (A = Ph , B = CH3 ) and 2,2-dimethylpropanes (A = B = CH3 ).
Return to the table of contents [next] [category] [top]Copyright (C)
1999 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
72, 2409-2416 (1999) [Vol. 72, No. 11, November, 1999]
Ferrocene derivatives are enumerated by means of the unit-subduced-cycle-index method and the characteristic-monomial method, where they are itemized with respect to formulas as well as to symmetries.
Return to the table of contents [next] [category] [top]Copyright (C)
1999 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
72, 2417-2422 (1999) [Vol. 72, No. 11, November, 1999]
Keiju Sawada,
Yuji Ohashi,*
and
Hirotaka Hirata
Water-insoluble drugs, such as 1-(2,4,6-trihydroxyphenyl)-1-propanone and 4-chloro-m -cresol, make molecular complexes with cationic surfactants. X-Ray crystal-structure analyses of the complexes explain the reason why complex formation increases the thermal stability and water-solubility compared with those of the drug crystal.
Return to the table of contents [next] [category] [top]Copyright (C)
1999 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
72, 2423-2428 (1999) [Vol. 72, No. 11, November, 1999]
Yoshiyuki Kuwatani,
and
Masahiko Iyoda
We have investigated the physical properties of a new charge transfer salt based on an asymmetric donor whose crystal structure contains a weakly dimerized donor stacking structure. This salt is considered to be in a Mott insulating state, taking account of the semiconductive resistivity and the behavior of the susceptibility.
Return to the table of contents [next] [category] [top]Copyright (C)
1999 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
72, 2429-2435 (1999) [Vol. 72, No. 11, November, 1999]
Electronic structure and photodynamics of flav-3-en-2-ol have been studied by steady-state and time-resolved absorption measurements, and by semi-empirical MO calculations. The photo-ring-opening reaction to produce 2-hydroxychalcone proceeds via the ground-state enol-form of 2-hydroxychalcone with quantum yield of 0.29.
Return to the table of contents [next] [category] [top]
=============================
Articles
Analitical and Inorganic
=============================
Copyright (C)
1999 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
72, 2437-2443 (1999) [Vol. 72, No. 11, November, 1999]
and
Kiyoshi Sawada
The partition equilibria of alkali metal picrates with or without a series of poly(oxyethylene) derivatives (S) into 4-methyl-2-pentanone (MIBK) have been studied. The thermodynamic equilibrium constants (in the scheme) in MIBK having a donating ability were evaluated and compared with those in an inert solvent, 1,2-dichloroethane.
Return to the table of contents [next] [category] [top]Copyright (C)
1999 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
72, 2445-2449 (1999) [Vol. 72, No. 11, November, 1999]
Indium is extracted into carbon tetrachloride as an ion pair of (5-sulfo-8-quinolinolato) indate(III) anion with tetradecyldimethylbenzylammonium chloride (Zeph+ , Cl- ), and subsequently back-extracted into 0.3 cm3 of nitric acid solution. The extracted ion associate was estimated to be [3Zeph+ , [In(quins)3 ]3- ]. The detection limit for In is 0.28 ng dm-3 , based on 2000-fold preconcentration.
Return to the table of contents [next] [category] [top]Copyright (C)
1999 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
72, 2451-2457 (1999) [Vol. 72, No. 11, November, 1999]
The hydrogen-insertion process by spillover on alkali metal decamolybdates was investigated in situ. Many findings for the process, such as dehydration induced by hydrogen insertion and some interesting differences between the insertion behaviours by hydrogen spillover and the chemical reduction with Zn/HCl, were obtained.
Return to the table of contents [next] [category] [top]Copyright (C)
1999 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
72, 2459-2462 (1999) [Vol. 72, No. 11, November, 1999]
PAA-B12C4 showed a Nernstian or near-Nernstian response to Li+
, Mg2+
, and Ca2+
in AN, PC, and GBL and the potential established site of the sensor was confirmed. The successive complex formation constants (i
) and Gibbs energies of transfer (
Gtr(j)
) of Li+
in AN and Mg2+
in PC in relations to DMF, DMSO, and HMPA were obtained.
Copyright (C)
1999 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
72, 2463-2468 (1999) [Vol. 72, No. 11, November, 1999]
and
Hitoshi Kamada
During our study for catalytic applications of hydroxo(protoporphyrinato)iron(III) (HEM) adsorbed on powdery supports such as CaO, MgO, and TiO2 , we found that efficient oxygen consumption was caused by HEM adsorbed on MgO having a medium surface basicity in the presence of cysteine.
Return to the table of contents [next] [category] [top]
=============================
Articles
Orgainc and Biological
=============================
Copyright (C)
1999 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
72, 2469-2473 (1999) [Vol. 72, No. 11, November, 1999]
Kinetic parameters for the thermal isomerization of double-decker sesquichalcogenides were determined. At higher temperatures, thermal reactions of (Thex2 Si2 S2 )2 S2 , (Thex2 Si2 Se2 )2 Se2 , and (Thex2 Ge2 Se2 )2 Se2 came to an equilibrium mixture of double-decker and adamantane-type isomers.
Return to the table of contents [next] [category] [top]Copyright (C)
1999 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
72, 2475-2482 (1999) [Vol. 72, No. 11, November, 1999]
Norbornene and its derivatives undergo a novel cyclopropanation with propargyl alcohol in methanol at 0 °C by the catalysis of cationic ruthenium complexes, {
5
-Cp'
Ru(CH3
CN)3
}(PF6
), to give exo
-3-acetyltricylooctane derivatives. Cyclopentadienyl-ruthenium catalysts having an electron-withdrawing substituent on the Cp ligand exhibited the highest activity and the cyclopropanation proceeded even at -20
°C.
Copyright (C)
1999 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
72, 2483-2490 (1999) [Vol. 72, No. 11, November, 1999]
The total synthesis of a macrocyclic antibiotic, micrococcin P1 , was first accomplished from ethyl 2-(2-bromoacetyl-6-dimethoxymethylpyridin-3-yl)thiazole-4-carboxylate derivative via a 2,3,6-tris(substituted thiazolyl)pyridine skeleton [Fragment A-C].
Return to the table of contents [next] [category] [top]Copyright (C)
1999 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
72, 2491-2499 (1999) [Vol. 72, No. 11, November, 1999]
2-Substituted 1,3-dithiane derivatives were subjected to metallation with n -BuLi or n -BuLi/Bu2 Mg at r.t.; the resulting anions reacted with 2,3-disubstituted oxiranes at r.t., giving the coupling products in satisfactory yields.
Return to the table of contents [next] [category] [top]Copyright (C)
1999 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
72, 2501-2507 (1999) [Vol. 72, No. 11, November, 1999]
The coupling product between chiral 2-substituted 2-lithio-1,3-dithiane and chiral 2,3-disubstituted oxirane was subjected to de-dithioacetalization and stereoselective reduction to afford four possible propionate-derived polyols.
Return to the table of contents [next] [category] [top]Copyright (C)
1999 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
72, 2509-2513 (1999) [Vol. 72, No. 11, November, 1999]
When human spectrin was labeled with N -(1-pyrenyl)iodoacetamide (NPIA), excimer fluorescence was observed. Such excimer fluorescence was also obtained in NPIA-labeled ghosts. From the thermal properties of excimer fluorescence, it was found that the structure of spectrin is altered upon tetramer-dimer transition of spectrin in the ghost membrane.
Return to the table of contents [next] [category] [top]Copyright (C)
1999 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
72, 2515-2521 (1999) [Vol. 72, No. 11, November, 1999]
The reaction of 2-substituted cycloalkanones with cerium(IV) sulfate tetrahydrate (CS) in alcohols and acetic acid gave the corresponding alkyl oxo esters (80-96%) and oxo acids (78-96%) respectively by an oxidative cleavage of the C(R)-C = O bond. The effects of cerium(IV) and copper(II) salts are also discussed.
Return to the table of contents [next] [category] [top]Copyright (C)
1999 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
72, 2523-2535 (1999) [Vol. 72, No. 11, November, 1999]
and
Tamejiro Hiyama*,
Liquid crystals containing an NCF3 group are prepared and shown to exhibit mainly a smectic phase in a wide range of temperatures. Electro-optical properties as a component of nematic LCs are compared with the corresponding methylamines.
Return to the table of contents [next] [category] [top]Copyright (C)
1999 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
72, 2537-2542 (1999) [Vol. 72, No. 11, November, 1999]
and
Tadamitsu Sakurai*
The Hammett analysis of substituent effects on the relative rate of homolytic N-O bond cleavage in the excited triplet state of the title hydroxylamines demonstrates that this bond cleavage poceeds through the transition state having, if any, a very small ionic character.
Return to the table of contents [next] [category] [top]Copyright (C)
1999 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
72, 2543-2548 (1999) [Vol. 72, No. 11, November, 1999]
The reaction of 1-azulenecarbaldehydes with pyrrole in acetic acid resulted in decarbonylation to afford azulenes even at room temperature. This reaction was adopted to the selective synthesis of 3,3' -unsubstituted di(1-azulenyl)methane derivatives. This reaction would serve as a new protecting method of 1- and/or 3-positions of azulene ring.
Return to the table of contents [next] [category] [top]Copyright (C)
1999 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
72, 2549-2556 (1999) [Vol. 72, No. 11, November, 1999]
The structure of the products obtained by base-induced isomerization of the 1,3-dipolar cycloadducts of p -benzoquinones with 2,6-dichlorobenzonitrile oxide was determined. A bulky alkyl group at the bridgehead position of the cycloadducts migrated to the neighboring carbonyl carbon. The driving force is considered to be due to stabilization by aromatization.
Return to the table of contents [next] [category] [top]
=============================
Articles
Applied and Materials
=============================
Copyright (C)
1999 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
72, 2557-2562 (1999) [Vol. 72, No. 11, November, 1999]
The 1 : 2 polycondensation of 3,3' ,4,4' -biphenyltetramine and 1,1' -ferrocenedimethanol catalyzed by [RuCl2 (PPh3 )3 ] gives ferrocenylene-containing polybenzimidazole, (Im-Fc-CH2 -O-CH2 -Fc)n (Im = [5,5' -bi(benzimidazole)]-2,2' -diyl, Fc = 1 ,1' -ferrocenylenediyl).
Return to the table of contents [next] [category] [top]Copyright (C)
1999 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
72, 2563-2566 (1999) [Vol. 72, No. 11, November, 1999]
Electric double-layer capacitors based on block-type carbon nanotube electrodes were fabricated. The specific capacitance was about 90 F g-1 . Thus block-type electrodes have potential uses in this field just as sheet-type ones do. Moreover, block-type electrodes enable one to fabricate a box-type capacitor which has space merit.
Return to the table of contents [next] [category] [top]Copyright (C)
1999 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
72, 2567-2571 (1999) [Vol. 72, No. 11, November, 1999]
CO2 was effectively decomposed to CO and O2 in an Ar stream by a plasma reactor. The major reaction pathway was speculated to consist of charge and energy transfers from excited Ar species to CO2 molecules as well as dissociation of C-O bonds on the electrode surface. Effects of the CO2 concentration in Ar on the intensities of emmision spectra from the reactant mixture (a) and on the conversion and rate of CO2 decomposition (b). Inner electrode, Cu; input voltage, 7 kV; total flow rate, 50 cm3 min-1 .
Return to the table of contents [next] [category] [top]
