,
'
-Dibenzylidenecycloalkanones
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General and Physical
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,
'
-Dibenzylidenecycloalkanones
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and
Yuanzhi Xu
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Articles
Analitical and Inorganic
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-Diketonato Chelates with 1,10-Phenanthroline across the Lanthanoid Series
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and
Shinji Sugihara
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-CO){
-Si(H)CHPh2
}(CO)n
MCp] (Cp*
= C5
Me5
, Cp = C5
H5
, M = Fe,
n
= 1; M = W,
n
= 2)
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Yuh-Sheng Wen,
Hiromi Tobita,*
and
Hiroshi Ogino*
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and
Yuzo Yoshikawa
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Articles
Orgainc and Biological
=============================
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and
Noboru Takeno
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-Addition to Chiral
-(Arylsulfinyl) Enones
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Toshihiro Akaike,
and
Kazukiyo Kobayashi*
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Articles
Applied and Materials
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Copyright (C) 1998 The Chemical Society of Japan
=============================
Headline Articles
=============================
Copyright (C)
1998 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
71, 2741-2747 (1998) [Vol. 71, No. 12, December, 1998]
Reactions of tetrakis(t -butyldimethylsilyl)disilene 1b with 1-alkenes with allylic hydrogens, styrene, and a 1,3-butadiene gave the corresponding ene-addition products, the [2+2] cycloaddition product, and the [4+2] cycloadduct, respectively. Tetrasilyldisilene 1b reacts with haloalkanes, affording the corresponding 2,3-dichlorotetrasilane or 2-alkyl-3-chlorotetrasilane, probably via radical mechanisms.
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1998 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
71, 2749-2756 (1998) [Vol. 71, No. 12, December, 1998]
IPN polymer hybrids of poly(N ,N' -dimethylacrylamide) gel and silica gel were prepared by the polymerization of N ,N' -dimethylacrylamide and N ,N' -methylenebisacrylamide in the sol-gel reaction mixture of tetramethoxysilane. IPN polymer hybrids of polystyrene gel were also prepared by the same method. They are highly homogeneous and have high resistivity to solvent extraction.
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Articles
General and Physical
=============================
Copyright (C)
1998 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
71, 2757-2767 (1998) [Vol. 71, No. 12, December, 1998]
The transport properties for eight equimolar binary gas mixtures (Ne+O2 , Ne+CO2 , Ne+N2O , Ne+SF6 , Ar+O2 , Ar+CO2 , Ar+N2O , and Ar+SF6 ) were determined from the principle of corresponding states for viscosity using the inversion method. The interaction potential of, say, Ar+SF6 is in excellent agreement with that obtained from thermal-diffusion measurements.
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1998 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
71, 2769-2776 (1998) [Vol. 71, No. 12, December, 1998]
Isotropic Raman scattering and X-ray diffraction measurements have been carried out on concentrated aqueous 10 mol% NaX (X: Cl, Br, ClO4 , and NO3 ) solutions. Information concerning the hydration structure of Na+ has been derived by the least-squares fitting analysis for observed isotropic Raman intensities and X-ray interference terms.
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1998 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
71, 2777-2786 (1998) [Vol. 71, No. 12, December, 1998]
,
'
-Dibenzylidenecycloalkanones
The formation of one-dimensional chains thorough a C-H...O intermolecular interaction has been found to be in common from X-ray structure analyses of the dibenzylidenecycloalkanone derivatives. Owing to this interaction, the derivatives crystallize in a non-centrosymmetric space group with high probability.
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1998 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
71, 2787-2796 (1998) [Vol. 71, No. 12, December, 1998]
and
Yuanzhi Xu
Three substituted oxovanadium(IV) phthalocyanines were studied by ESEEM spectroscopy. The 14 N hyperfine and quadrupole couplings of the isoindole nitrogens were examined. It was found that the orientation of the quadrupole unique axis is different in one complex (R = NH2 ), which is shown to be attributed to substituent effects.
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1998 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
71, 2797-2805 (1998) [Vol. 71, No. 12, December, 1998]
Luminous properties of a green phosphor, Tb-Y3 Al5 O12 , have been studied by 89 Y-static and -MAS NMR and 27 Al-MAS NMR. The shift of the newly appeared shoulder peaks in Tb-Y3 Al5 O12 was predominantly caused by the pseudocontact mechanism via the second to fifth Tb3+ ions neighboring to the resonating 89 Y atom. The completely homogeneous distribution of Tb3+ ions is essential for the stronger brightness of the green phosphor.
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1998 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
71, 2807-2816 (1998) [Vol. 71, No. 12, December, 1998]
An azobenzene (Az) containing amphiphile having a urea head group [N -(10-{4-[(4-hexylphenyl)azo]phenoxy})decylurea (6Az10-Urea)] was synthesized. A unique aggregation property in the monolayer on the water surface was found, which is attributable to the formation of bifurcated NH...O=C intermolecular hydrogen bonds.
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1998 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
71, 2817-2824 (1998) [Vol. 71, No. 12, December, 1998]
Cs2.5 H0.5 PW12 O40 , solid heteropoly compound with strong acidity, effectively catalyzed pinacol rearrangement of 1,1,2-triphenyl-1,2-ethanediol in a solvent-free solid system at room temperature. The solid-solid reaction was initiated by grinding of the catalyst and reactant powders, and gave a conversion larger than that of a conventional solid-liquid reaction.
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Articles
Analitical and Inorganic
=============================
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1998 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
71, 2825-2829 (1998) [Vol. 71, No. 12, December, 1998]
-Diketonato Chelates with 1,10-Phenanthroline across the Lanthanoid Series
The enthalpy change in the adduct formation of tris(2-thenoyltrifluoroacetonato)lanthanoids with 1,10-phenanthroline has been determined in CHCl3 across the lanthanoid series by calorimetry. The enthalpy change increases remarkably from endothermic to exothermic across the series, while the entropy change decreases from middle to heavy lanthanoids.
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1998 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
71, 2831-2836 (1998) [Vol. 71, No. 12, December, 1998]
A phenylboronic acid-modified capillary was examined from various viewpoints of separation chemistry. For example, the capillary successfully separated a mixture of nucleosides in electrophoresis. The separation was based on an interaction between the cis -diol groups and phenylboronic acid sites. The obtained results are interesting as a new separation technique.
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1998 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
71, 2837-2843 (1998) [Vol. 71, No. 12, December, 1998]
and
Shinji Sugihara
Five complexes that show spin-crossover behavior were synthesized and characterized. Li-complex was richer in the low-spin state in the solid than Na-, K-, or Rb-complexes. Temperature dependencies of the magnetic and spectroscopic properties were examined in detail in the solid and in acetonitrile solution.
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1998 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
71, 2845-2851 (1998) [Vol. 71, No. 12, December, 1998]
Water-soluble hydroxycalix[n ]arene-p -sulfonates, 1nn- (n = 4 , 6, and 8), were quantitatively extracted from an aqueous solution into chloroform with trioctylmethylammonium ion (TMA+ ), forming ionic associates, 1n (TMA+ )(n+j ) over a wide pH range. This reaction was applied to the selective solvent extraction of metal ions using 144- .
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1998 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
71, 2853-2858 (1998) [Vol. 71, No. 12, December, 1998]
Heating of a benzene or toluene solution of mer -[RhH(SAr)(SiHAr' 2 )(PMe3 )3 ] gives fac -[RhH2 {SiAr' 2 (SAr)}(PMe3 )3 ] quantitatively through thiolato group transfer from Rh to Si. The reaction mechanism is discussed, based on results of the kinetic study.
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1998 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
71, 2859-2864 (1998) [Vol. 71, No. 12, December, 1998]
1,5-Bis(trifluoromethyl-sulfonyloxy)-1
4
,54
-dithiabicyclo[3.3.0]octane (
1
) oxidatively reacted with Pd2
(dba)3
(dba = dibenzylidene
acetone) in the presence of phosphine ligand to give dicationic phosphine palladium complexes of the formula [Pd(dtco)(L)2
](OTf)2
(
3
: L = PMe2Ph
;
4
: L = PPh3
;
5
: L2 = 1,2
-bis(diphenylphosphino)ethane;
6
: L2 = (R)
-2,2'
-bis(diphenylphosphino)-1,1'
-binaphthyl) (DTCO = 1,5
-Dithiacyclooctane).
Copyright (C)
1998 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
71, 2865-2871 (1998) [Vol. 71, No. 12, December, 1998]
-CO){
-Si(H)CHPh2
}(CO)n
MCp] (Cp*
= C5
Me5
, Cp = C5
H5
, M = Fe,
n
= 1; M = W,
n
= 2)
Yuh-Sheng Wen,
Hiromi Tobita,*
and
Hiroshi Ogino*
Photolysis of [CpFe(CO)2
SiMe3
] or [CpW(CO)3
Me] with [Cp*
Fe(CO)2
SiH2
CHPh2
] produces novel unsymmetric silanediyl-bridged complexes [Cp*
Fe(CO)(
-CO){
-Si(H)CHPh2
}(CO)n
MCp] (M = Fe
, n = 1
; M = W
, n = 2
) in moderate yields. The structures of these complexes have been determined by X-ray diffraction analysis.
Copyright (C)
1998 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
71, 2873-2884 (1998) [Vol. 71, No. 12, December, 1998]
and
Yuzo Yoshikawa
Tripodal tetradentate ligands with an N2 O2 donor set afforded mixed-valence di-, tri-, and tetranuclear manganese complexes, which involve MnIII -MnII , MnIII -MnII -MnIII , and MnIII -MnII -MnII -MnIII arrangements, respectively. The number of Mn cores and bridging frameworks are controlled by the steric factors of substituents on the tetradentate ligands.
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1998 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
71, 2885-2892 (1998) [Vol. 71, No. 12, December, 1998]
The reactions of [Pd(CH3
CN)4
](BF4
)2
with dmpp and/or bidmpp (dmpp = 3,4
-dimethyl-1-phenylphosphole; bidmpp = 3
,3'
4,4'
-tetramethyl-1,1'
-diphenyl-2,2'
-biphosphole) in CH2
Cl2
gave square-planar homoleptic complexes. Those complexes were characterized to indicate that the palladium-phosphole interaction is governed by predominantly a 
-donation and some contribution from 
-back bonding to phosphorus atoms in the ligands.
=============================
Articles
Orgainc and Biological
=============================
Copyright (C)
1998 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
71, 2893-2902 (1998) [Vol. 71, No. 12, December, 1998]
Dehydrative glycosylation using 2,3,4,6-tetra-O
-benzyl-
d
-glucopyranose and a condensing reagent system composed of Et2
NSF3
(DAST), (CF3
SO3
)2
Sn, Bu4
NClO4
, and Et3
N was carried out. Using this method, we synthesized two tetrasaccharides: O
-
-
d
-Glcp
-(1
4
)-O
-
-
d
-Glcp
-(13
)-O
-
-
d
-Glcp
-(14
)-
d
-Glcp
(
A
) and O
-
-
d
-Glcp
-(13
)-O
-
-
d
-Glcp
-(14
)-O
-
-
d
-Glcp
-(14
)-
d
-Glcp
(
B
), which are candidates for an anticariogenic sugar substitute.
Copyright (C)
1998 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
71, 2903-2921 (1998) [Vol. 71, No. 12, December, 1998]
The treatment of tribromofluoromethane with butyllithium at -130 °C afforded thermally labile carbenoid LiCFBr2 , which successively reacted with coexisting aldehydes and ketones to give dibromofluoromethyl-2-alkanols in good yields. The alcohols were converted into various types of fluoro olefins and 2-bromo-2-fluoro-1,3-alkanediols stereoselectively.
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1998 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
71, 2923-2928 (1998) [Vol. 71, No. 12, December, 1998]
and
Noboru Takeno
3-Benzylidene-4-chromanones ( 1 ) were reduced to 3-benzyl-4-chromanones ( 3 ) through the 1,4-addition of organoboranes, such as 9-borabicyclo[3.3.1]nonane (9-BBN), while no reaction occurred in the case of 3-benzyl-4H -chromen-4-one ( 2 ). The reaction was efficiently promoted by palladium catalysts, especially dichloro[1,1' -bis(diphenylphosphino)ferrocene]palladium [PdCl2 (dppf)].
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1998 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
71, 2929-2935 (1998) [Vol. 71, No. 12, December, 1998]
Pd(0)-catalyzed domino cyclization-carbonylation of 5,8-dimethyl-5-(1,2-propadienyl)-2,8-nonadienyl acetate was achieved. The tricyclic and tetracyclic products were produced in 77% combined yield via five and six consecutive carbon-carbon bond formation, each step proceeding in > 94% yield.
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1998 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
71, 2937-2943 (1998) [Vol. 71, No. 12, December, 1998]
3,4' -Bis(4,5-dihydro-4,4,5,5-tetramethyl-3-oxido-1-oxyl-3-imidazolio-2-yl)azobenzene was synthesized and analyzed by crystallography, ESR spectroscopy, and SQUID magnetometry/susceptometry. The photochromic reaction was monitored by ESR and UV-vis spectroscopy.
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1998 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
71, 2945-2955 (1998) [Vol. 71, No. 12, December, 1998]
Cyclization of 2-(3-hydroxyphenyl)ethyl ketone O -2,4-dinitrophenyloximes proceeds on oxime nitrogen atom by the treatment with NaH, affording quinolin-8-ols or 1,2,3,4-tetrahydroquinolin-8-ols regioselectively. The cyclization proceeds via alkylideneaminyl radical intermediates generated by the single electron transfer between 3-hydroxyphenyl and 2,4-dinitrophenyl moieties.
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1998 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
71, 2957-2965 (1998) [Vol. 71, No. 12, December, 1998]
-Addition to Chiral
-(Arylsulfinyl) Enones
Reactions of the
-(arylsulfinyl) enones with alkyl radicals having a hydroxy or acetal group were examined under irradiation. High face selection was observed in the radical reaction of 2-(arylsulfinyl)-2-cyclopentenones. The reaction of 3-[(2,4,6-triisopropylphenyl)sulfinyl]-3-penten-2-one in 1,3-dioxolane also gave a single diastereomer.
Copyright (C)
1998 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
71, 2967-2972 (1998) [Vol. 71, No. 12, December, 1998]
1,1,3,3-Tetraisocyanato-1,3-dimethyldisiloxane and hexaisocyanatodisiloxane were synthesized by the hydrolysis of triisocyanato(methyl)silane and tetraisocyanatosilane, respectively. The reaction of these compounds with alcohols provided alkoxyisocyanatodisiloxanes, (RO)n (NCO)4-n Me2 Si2 O (R = Et , n = 1 -4; R = Pri , n = 1 -4; and R = But , n = 1 -2) and [(RO)n (NCO)3-n Si]2 O (R = Et , n = 2 -3; R = Pri , n = 1 -3; and R = But , n = 1 -2), selectively and in high yield.
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1998 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
71, 2973-2977 (1998) [Vol. 71, No. 12, December, 1998]
Toshihiro Akaike,
and
Kazukiyo Kobayashi*
Adsorption behaviors of lactose-carrying polystyrenes onto cast films of polystyrene and self-assembled monolayers of 1-octadecanethiol and cystamine were investigated by using a quartz-crystal microbalance. The polymers were adsorbed onto hydrophobic surfaces with large association constants, but not onto a hydrophilic surface.
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=============================
Articles
Applied and Materials
=============================
Copyright (C)
1998 The Chemical Society of Japan
Bull. Chem. Soc. Jpn.,
71, 2979-2984 (1998) [Vol. 71, No. 12, December, 1998]
O -(p -Hydroxybenzyl) Calix[4]resorcinarene was prepared and employed as a new alkaline developable photoresist material. The three-component resist system based on the resorcinarene derivative, a photo-acid generator, and a cross-linker gave high contrast images by UV exposing and developing with an aqueous alkaline solution.
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