STRUCTURE AND DYNAMICS OF HINDERED ORGANOSILICON COMPOUNDS - THE CONFORMATIONS OF SYMMETRICAL (ME3SI)3C AND (PHME2SI)3C DERIVATIVES

被引：21

作者：

AVENT, AG

BOTT, SG

LADD, JA

LICKISS, PD

PIDCOCK, A

机构：

[1] UNIV OXFORD,INORGAN CHEM LAB,OXFORD OX1 3QB,ENGLAND

[2] UNIV SUSSEX,SCH CHEM & MOLEC SCI,BRIGHTON BN1 9QJ,E SUSSEX,ENGLAND

[3] UNIV SALFORD,DEPT CHEM & APPL CHEM,SALFORD M5 4WT,LANCS,ENGLAND

[4] LANCASHIRE POLYTECH,DEPT CHEM,PRESTON PR1 2TQ,ENGLAND

来源：

JOURNAL OF ORGANOMETALLIC CHEMISTRY | 1992年 / 427卷 / 01期

关键词：

D O I：

10.1016/0022-328X(92)83200-2

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

At low temperatures the methyl region of the H-1 and C-13 NMR spectra of (Me3Si)3CSiCl3 and the H-1 NMR spectrum of (Me3Si)3CSiBr3 each show three signals of equal intensity and the Si-29 NMR spectrum of the trichloride shows only one Me3Si signal. These data are consistent with the methyls within each Me3Si group becoming inequivalent. Compounds containing the (PhMe2Si)3C group are able to adopt different conformations at low temperature; in (PhMe2Si)3CSiCl3 the phenyl groups mesh together while in (PhMe2Si)3CBr they are separated by methyl groups. These different arrangements of the ligand can readily be distinguished by H-1 NMR spectroscopy, and the conformation in the case of (PhMe2Si)3CSiCl3 has been confirmed in the solid state by X-ray crystallography.

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页码：9 / 21

页数：13

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