期刊
JOURNAL OF ORGANOMETALLIC CHEMISTRY
卷 675, 期 1-2, 页码 84-90出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/S0022-328X(03)00252-3
关键词
trivacant heterpolyanion; organosilicon; synthesis; crystal structure
In the presence of (NBu4Br)-Br-n acting as phase-transfer reagent, organosilicon trichloride RSiCl3 reacts in acetonitrile with the trivacant tungstophosphate sodium salt beta-A-Na8H[PW9O34].24 H2O to give hybrid organosilyl polyoxotungstate derivatives alpha-A-[NBu(4)n](3)[PW9O34(RSiO)(3)(RSi)] (R = C2H3 (1), CH3 (2)). These compounds are characterized by X-ray crystallography. Each of the two hybrid anions consists of one alpha-A-PW9O349- framework on which is grafted by three RSiO groups through six Si-O-W 34 bridges, each of which is attached to the fourth RSi through three Si-O-Si bridges. Both hybrid anions become saturated, close cage structure and display C-3nu symmetry. (C) 2003 Elsevier Science B.V. All rights reserved.
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