Comparative solid-state NMR study of the molecular dynamics of Si(SiMe3)4 and C(SiMe3)4

被引：15

作者：

Helluy, X

Kummerlen, J

Sebald, A

机构：

[1] Univ Bayreuth, Bayer Geoinst, D-95440 Bayreuth, Germany

[2] Rhone Poulenc Rorer, Ctr Rech Vitry Alfortville, Dept Pharmaceut Sci Preformulat Phys Anal, F-94403 Vitry, France

来源：

ORGANOMETALLICS | 1998年 / 17卷 / 23期

关键词：

D O I：

10.1021/om980041s

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Variable-temperature C-13 and Si-29 one- and two-dimensional MAS NMR experiments are reported for the low-temperature phases of Si(SiMe3)(4) (1) and C(SiMe3)(4) (2). Quantitative determination of exchange rate constants from 13C and 29Si NMR spectra of 1 and 2 proves considerable dissimilarities of the molecular solid-state dynamic properties of 1 and 2, despite the chemically and structurally homologous nature of these two compounds. In the low-temperature phase of 1, internal SiMe3 and whole-molecule reorientation occurs, while for the low-temperature phase of 2 no internal SiMe3 reorientation but only whole-molecule reorientation is observed.

引用

页码：5003 / 5008

页数：6

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