Zobrazeno 1 - 10
of 42
pro vyhledávání: '"Gilbert Herve"'
Publikováno v:
Inorganic Chemistry. 44:1275-1281
The dimer α-[{K(H2O)2}(Si2W18O66)]15- (1), synthesized by reacting K10A-α-[SiW9O34] with two equivalents of H+ in aqueous solution, has been characterized by polarography and 183W NMR spectroscopy. Nine resonance signals have been observed with the
Publikováno v:
Inorganic Chemistry. 42:5857-5862
The influence of the nature of alkali metal cations on the structure of the species obtained from the trivacant precursor A-alpha-[SiW(9)O(34)](10-) has been studied. Starting from the potassium salt 1, K(10)A-alpha-[SiW(9)O(34)].24H(2)O, the sandwic
Publikováno v:
Inorganica Chimica Acta. 328:81-86
The nickel arsenatotungstate K10[As2W19(H2O){Ni(H2O)}2O67]·18H2O (1) has been synthesized. Due to its instability in water, attempts to obtain crystals of 1 suitable for X-ray diffraction have failed. The stabilization of the [As2W19(H2O){Ni(H2O)}2O
Publikováno v:
Inorganic Chemistry. 40:2000-2004
The tetrabutylammonium γ-dodecatungstosilicate has been crystallized in a 6/1 acetonitrile/water solvent. An X-ray single-crystal analysis was carried out on [N(C4H9)4]4-γ-[SiW12O40] which crystall...
Publikováno v:
Solid State Sciences. 3:329-338
The vanadyl salt [Na(H2O)2]2[VO(H2O)5][SiW12O40]·4H2O has been synthesized in mild conditions by cationic exchanges from dodecasilicotungstic acid. Structural determination and EPR study have been achieved on single crystals. They are tetragonal, sp
Publikováno v:
Comptes Rendus de l'Académie des Sciences - Series IIC - Chemistry. 3:95-100
A novel anion derived from the Anderson structure has been obtained in aqueous acid solution by condensation of three pairs of edge-sharing molybdenum octahedra around a central arsenite. This association forms a hexanuclear ring of Mo(V) with three
Publikováno v:
Inorganic Chemistry. 38:3670-3675
The novel dimeric polyoxometalate [{beta-SiNi(2)W(10)O(36)(OH)(2)(H(2)O)}(2)](12)(-) (1) has been synthesized and characterized by IR spectroscopy, polarography, elemental analysis, thermogravimetric analysis, and magnetic measurements. An X-ray sing
Publikováno v:
Inorganic Chemistry. 38:2038-2042
The novel polyoxometalate [H2PW9Ni4O34(OH)3(H2O)6]2- (1) has been synthesized and characterized by IR spectroscopy, polarography, elemental analysis, and magnetic measurements. An X-ray single-crystal analysis was carried out on Cs2[H2PW9Ni4O34(OH)3(
Publikováno v:
Polyhedron. 17:4353-4364
The extended Huckel molecular orbital (EHMO) calculations have been carried out using cluster approach to polyoxo anions, i.e. calculations have been done for a single octahedron MO 6 of different symmetry and results have been used to analyze 183 W
Publikováno v:
Inorganic Chemistry. 36:5666-5669
The reaction of tungstate with the γ-decatungstosilicate anion leads to [Si2W23O77(OH)]9-. This anion results from the association of γ-[SiW10O36]8- and γ-[SiW11O39]8- by a (μ-oxo)ditungstic group.