SYNTHESIS AND ELECTROSYNTHESIS OF BIS-SILYLATED CYCLOPENTADIENYLNIOBIUM(V) CATIONIC COMPLEXES - THEIR REACTIONS AND STRUCTURAL CHARACTERIZATION

被引：7

作者：

ANTINOLO, A

FAJARDO, M

OTERO, A

MUGNIER, Y

NABAOUI, H

MOURAD, H

机构：

[1] UNIV CASTILLA LA MANCHA, FAC CIENCIAS QUIM, DEPT QUIM, E-13071 CIUDAD REAL, SPAIN

[2] UNIV ALCALA DE HENARES, DEPT QUIM INORGAN, E-28871 ALCALA DE HENARES, SPAIN

[3] FAC SCI DIJON, SYNTH & ELECTROSYNTH ORGANOMET, CNRS, UA 33, F-21000 DIJON, FRANCE

来源：

JOURNAL OF ORGANOMETALLIC CHEMISTRY | 1991年 / 414卷 / 02期

关键词：

D O I：

10.1016/0022-328X(91)86098-B

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Chemical oxidation of complexes Nb(eta-5-C5H4SiMe3)2X2, X = Cl (1), Br (2), I (3), with ferrocenium hexafluorophosphate in dichloromethane gives the cationic complexes [Nb(eta-5-C5H4SiMe3)2X2]+ PF6-, X = Cl (4), Br (5), I (6). These species can be prepared by electrochemical oxidation of complexes 1, 2 and 3 in dichloromethane; cationic complexes can also be prepared in THF but they are relatively unstable. In N,N-dimethylformamide (DMF) the complexes [Nb(eta-5-C5H4SiMe3)2X(DMF)]2+ are electrogenerated. Complexes 4, 5 and 6 behave as acids towards nucleophilic reagents, so that they react with alcohols and water to give adducts (which could not be isolated) and with Me3SiOR reagents to give the new niobium(V) alkoxide complexes [Nb(eta-5-C5H4SiMe3)2Cl(OR)]+ PF6-, R = CH3 (7), CH2CH3 (8), CH(CH3)2 (9), which were isolated as crystalline solids.

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页码：155 / 164

页数：10

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