29Si and 13C Nuclear magnetic resonance studies of organosilicon chemistry: III. Compounds containing a direct SiH bond
✍ Scribed by R.K. Harris; B.J. Kimber
- Publisher
- Elsevier Science
- Year
- 1976
- Weight
- 446 KB
- Volume
- 8
- Category
- Article
- ISSN
- 0001-8716
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✦ Synopsis
Silicon-29 spin-lattice relaxation times and 29Si-(1H} nuclear Overhauser enhancements are reported for five trialkylsilanes and for sym-tetramethyldisiloxane, all of which contain a direct Si-H bond. Relaxation rate contributions from (Si, H) dipolar interactions and from other mechanisms are evaluated and discussed in terms of molecular mobility. For the smaller molecules it is concluded that the spin-rotation contribution to (T,)-' is dominant but, when the alkyl groups are bigger than ethyl, dipolar interactions are more important than spin-rotation. Silicon-29 chemical shifts and coupling constants are also presented and briefly discussed.