Keiko Takano,
and
Tadashi Nakata
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Articles
Orgainc and Biological
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Keiko Takano,
and
Tadashi Nakata
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Articles
General and Physical
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Katsuhiko Fujita,
Takashi Kakiuchi,,GO TO the graphical abstract
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and
Hiroyasu Nagamori
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Articles
Analitical and Inorganic
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Toshiki Mutai, and
Koji Araki*
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Articles
Orgainc and Biological
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-hydroxydiphenylmethyl)-1,4-dioxaspiro-[4.4]nonane and -[4.5]decane.
Mechanistic Study Based on X-Ray Crystal Structure Analyses
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Hisakazu Miyamoto,
and
Fumio Toda,*,
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and
Kazuo Iguchi*,
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and
Hideyuki Matsumoto*
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-Colonna Asymmetric Epoxidation Reaction of Chalcone Catalyzed by Length Defined Oligo-
L
-leucine:
Importance of the
N
-Terminal Functional Group and Helical Structure of the Catalyst in the Asymmetric Induction
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-System
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Articles
Applied and Materials
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Copyright (C)
2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 1945-1954 (2000) [Vol. 73, No. 9, September, 2000]
As novel synthetic incorporation of metal complexes into DNA and peptides, first, artificial 
-C
-nucleosides bearing a chelator nucleobase have been synthesized for alternative metal-assisted base pairing. Secondly, the liquid-phase synthesis of cyclic metallopeptides, cyclo
[-Gly-
L
-Cys(terpyPtII
)-]n
Cln
(n = 3
, 4), has been exploited.
=============================
Articles
Orgainc and Biological
=============================
Copyright (C)
2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 1955-1965 (2000) [Vol. 73, No. 9, September, 2000]
Keiko Takano,
and
Tadashi Nakata
A classification and prediction method of reagents' roles is presented. The same dimensional factors characterize reagents independent of the number of atoms. A neural network that was improved for this study successfully classified the reagents and produced a reagent-roles correlation model.
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Articles
General and Physical
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Copyright (C)
2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 1967-1972 (2000) [Vol. 73, No. 9, September, 2000]
Neutron diffraction with 14 N/15 N and H/D isotopic substitution method has been applied to aqueous 2 mol% glycine solutions under high-pH condition. Detailed structural information on the first hydration shell around both amino- and methylene groups of the glycine molecule is derived.
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2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 1973-1978 (2000) [Vol. 73, No. 9, September, 2000]
The temperature dependence of negative ions from C5 F5 N and C6 F5 X (X = F , CN, CF3 , C6 F5 ) was studied by using negative chemical ionization mass spectrometry. The results of geometry calculation have shown that production and reaction mechanism of negative ions are almost the same.
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2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 1979-1986 (2000) [Vol. 73, No. 9, September, 2000]
A chiral replacement criterion has been proposed to characterize stereochemical equivalence such as holotopic and hemitopic relationships.
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2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 1987-1991 (2000) [Vol. 73, No. 9, September, 2000]
We measured the heat capacities of the three isomers of 2-Butoxyethanol from 13 to 300 K by adiabatic calorimetry, as well as the density of the liquid and supercooled liquid states. The thermodynamic functions, including the amplitude of entropy fluctuation, were determined.
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2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 1993-2000 (2000) [Vol. 73, No. 9, September, 2000]
Katsuhiko Fujita,
Takashi Kakiuchi,,
The adsorption behavior of native heme and its thiolated derivatives on gold surfaces was demonstrated using SPS, IR, and UV spectroscopies. Their redox behavior was also characterized using CV and ER methods.
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2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 2001-2008 (2000) [Vol. 73, No. 9, September, 2000]
The authors propose ``in-bond orbitals'' to compensate the shortcomings of minimal LCAO picture without destroying its simple concept. In-bond orbitals express well the electronic structures of bonding and antibonding internuclear regions. Furthermore, they are continuously correlated with the AOs of the united atom.
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2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 2009-2016 (2000) [Vol. 73, No. 9, September, 2000]
The concept of size-invariant subductions has been proposed to design prochiral molecules. Thereby, prochiral molecules having chiral ligands are classified into extrinsic and intrinsic meso compounds.
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2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 2017-2023 (2000) [Vol. 73, No. 9, September, 2000]
and
Hiroyasu Nagamori
A Rowland fluorescence spectrometer equipped with bent Ge(111) crystal and scintillation counter was developed for site-selective XAFS. Chemical shifts of Cu K
and Cr K
peaks were measured. Energy resolution was determined by three slit sizes in the spectrometer.
=============================
Articles
Analitical and Inorganic
=============================
Copyright (C)
2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 2025-2032 (2000) [Vol. 73, No. 9, September, 2000]
The title reaction velocity depends on the acidity of the solution. The amphiproticity of the hydrogencarbonatocobalt(III) intermediate is derived therefrom: Ka = 10-6
-0.6 M and Kb/Kw 
0.3
M-1
.
Copyright (C)
2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 2033-2041 (2000) [Vol. 73, No. 9, September, 2000]
The aggregation of novel-type cobalt(III) surfactants, such as [Co(en)2 {NH2 (CH2 )2 S(1-Cn H2n+1 )}]3+ (n = 6 , 8, and 12) and [(en)2 Co{NH2 (CH2 )2 S(CH2 )m S(CH2 )2 NH2 }Co(en)2 ]6+ (m = 8 and 12), was studied in water using multinuclear NMR spectroscopies, 1 H NMR self-diffusions, and 1 H NMR chemical shifts. The 59 Co linewidths and 35 Cl relaxation rates show cmcs for premicelles in the hexyl mononuclear and octyl dinuclear complex systems.
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2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 2043-2050 (2000) [Vol. 73, No. 9, September, 2000]
Circular dichroism (CD) spectrophotometric determinations of Fe(III), Fe(II), Co(III), Co(II), and Ni(II) have been successful by taking advantage of the S -bridged trinuclear complex formation of fac (S )-[Rh(aet or L -cys-N ,S )3 ]0 or 3- . This method is quite simple and effective for the simultaneous determination of metal ions.
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2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 2051-2058 (2000) [Vol. 73, No. 9, September, 2000]
Toshiki Mutai, and
Koji Araki*
Photoinduced energy-transfer systems were conveniently constructed by reacting a novel building block, [Ru(bpy)2 (dppz-NH2 )]2+ , with energy-accepting units having a carboxylic acid function.
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2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 2059-2066 (2000) [Vol. 73, No. 9, September, 2000]
New Iron(III) complexes [Fe(salten)(trans -stpy)]BPh4 .acetone.0.5H2 O 1 and [Fe(salten)(cis -stpy)]BPh4 2 with cis -trans photoisomerizable ligands, 4-styrylpyridine exhibit spin-crossover phenomena in a solid and in an acetonitrile solution. Light irradiation to 1 brings about isomerization from trans - to cis - of 4-styrylpyridine.
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2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 2067-2073 (2000) [Vol. 73, No. 9, September, 2000]
The reaction of [Pd(aet)2 ] (aet = 2 -aminoethanethiolate) with [Pd(NO3 )2 (diimine)] (diimine = 2 ,2' -bipyridine (bpy), 4,4' -dimethyl-2,2' -bipyridine (dmbpy), 1,10-phenanthroline (phen), 4,7-dimethyl-1,10-phenanthroline (dmphen)) gave S-bridged tetranuclear complexes [{Pd(diimine)}2 {Pd(aet)2 }2 ]4+ . Some spectrochemical properties of these complexes are discussed in relation to their crystal structures, which were determined by X-ray structural analysis.
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Articles
Orgainc and Biological
=============================
Copyright (C)
2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 2075-2085 (2000) [Vol. 73, No. 9, September, 2000]
-hydroxydiphenylmethyl)-1,4-dioxaspiro-[4.4]nonane and -[4.5]decane.
Mechanistic Study Based on X-Ray Crystal Structure Analyses
Hisakazu Miyamoto,
and
Fumio Toda,*,
The absolute configurations of the photoproducts of guests are dependent on the hosts. The structures of the inclusion crystals have been determined to elucidate the mechanism of the enantioselectivities in the solid-state reaction.
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2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 2087-2091 (2000) [Vol. 73, No. 9, September, 2000]
and
Kazuo Iguchi*,
A new maleic anhydride derivative 1 (FR222398) was isolated from fermentations with the fungus Talaromyces sp. No. 10092. The structure of 1 was determined based on spectroscopic analysis and chemical conversion. The sodium salt of 1 showed a dispersant activity toward kaolin suspension.
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2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 2093-2097 (2000) [Vol. 73, No. 9, September, 2000]
and
Hideyuki Matsumoto*
Octakis(1,1,2-trimethylpropyl)octagermacubane ( 1 ) was synthesized by the condensation reaction, and characterized by X-ray crystallography. The ring-opening reaction followed by skeletal rearrangement of 1 took place to give endo ,exo - and exo ,exo -4,8-dichlorooctathexyltetracyclo[3.3.0.02,7 .03,6 ]octagermanes. Treatment of these dichlorides with sodium afforded octagermacubane 1 .
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2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 2099-2108 (2000) [Vol. 73, No. 9, September, 2000]
An NMR spectroscopy for reactions among [RuH2 (CO)(PPh3 )3 ], styrene, and 3' -(trifluoromethyl)acetophenone detects three cyclometallated hydridoruthenium (II) complexes, 8 , 9 , and 12 . On the basis of these data, a mechanism for the ruthenium complex-catalyzed C-H/olefin coupling reaction is proposed.
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2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 2109-2114 (2000) [Vol. 73, No. 9, September, 2000]
Hexaphenyl[3]radialene and its derivatives here first synthesized are stable, orange to red, crystalline substances. Among them hexa-p -nitro derivative has a strong electron affinity and X-ray analysis of hexa-p -cyano derivative shows a double three-bladed propeller conformation.
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2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 2115-2121 (2000) [Vol. 73, No. 9, September, 2000]
-Colonna Asymmetric Epoxidation Reaction of Chalcone Catalyzed by Length Defined Oligo-
L
-leucine:
Importance of the
N
-Terminal Functional Group and Helical Structure of the Catalyst in the Asymmetric Induction
Juli-Colonna asymmetric epoxidation using oligo-
L
-leucine with defined degrees of polymerization was investigated. The presence of an unprotected amine moiety at the N
-terminus played an important role for high asymmetric induction.
Copyright (C)
2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 2123-2127 (2000) [Vol. 73, No. 9, September, 2000]
A hydrogen-bonded network solid, anthracenebisresorcinol (host 1 ), selectively incorporates two mols of polar guests from an aqueous solution via cooperation of hydrogen bonding and apolar interactions. Host 1 also catalyzes the Diels-Alder reaction of acrylaldehyde with 1,3-cyclohexadiene.
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2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 2129-2137 (2000) [Vol. 73, No. 9, September, 2000]
-System
The silyl-substituted [5]radialene 2 was reacted with lithium metal in tetrahydrofuran to give dark red crystals of the tetralithium salt 4 of [5]radialene.
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2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 2139-2147 (2000) [Vol. 73, No. 9, September, 2000]
Treatment of trialkyl(dibromomethyl)silanes with trialkylmanganate provided (E )-1-trialkylsilyl-1-alkenes with high stereoselectivity in good yields. The reaction of 1,2-bis(dibromomethyl)benzene with triphenylmanganate gave 1,2-diphenyl-1,2-dihydrobenzocyclobutene.
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2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 2149-2155 (2000) [Vol. 73, No. 9, September, 2000]
Aryltin compounds can be employed for Pd(II)-catalyzed Michael-type hydroarylation to
,
-unsaturated ketones and aldehydes in acetic acid. Slightly fewer than four aryl groups of tetraaryltins can be transferred to the products in the presence of a soluble metal chloride.
Copyright (C)
2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 2157-2158 (2000) [Vol. 73, No. 9, September, 2000]
,,
The structure of the kinetically stabilized 2-silanaphthalene was re-determined by X-ray crystallographic analysis at -180 °C. The crystal structure was refined more adequately than the previous results by the separation of the disorder of overlapped two 2-silanaphthalene moieties.
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2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 2159-2160 (2000) [Vol. 73, No. 9, September, 2000]
Treatment of 1-dodecyne with triphenylgermane in the presence of catalytic amount of tributylmanganate provided 1-triphenylgermyl-1-dodecene in good yield.
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Articles
Applied and Materials
=============================
Copyright (C)
2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 2161-2167 (2000) [Vol. 73, No. 9, September, 2000]
Human hair consists of two structural parts, both of which have two (elastic and plastic) states, depending on the temperature (Two-part/two-state model). This structural model is powerful to generally explain the physical properties of human hair.
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2000 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
73, 2169-2177 (2000) [Vol. 73, No. 9, September, 2000]
The two-part/two-state model for human hair proposed previously has been successfully applied to the mechanical and dye-permeation properties. Stress-strain curves over a wide range of temperature and the diffusion of dye molecules were analyzed using the model.
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