โ Scribed by R.K. Harris; B.J. Kimber
No coin nor oath required. For personal study only.
29Si and 13C spin-lattice relaxation times and the corresponding nuclear Overhauser enhancements have been measured for Ph,SiH,_, (n = 1,2, 3), for Ph,SiHMe and for Ph,SiCl, . Thence dipolar and other contributions to the relaxation rates have been separated. The dipolar rates are used to discuss internal rotation about the phenyl-Si bond, and overall motional anisotropy.
The value of T,(Si) for PhSiH, is very short and, it is suggested, is dominated by the spininternal-rotation interaction.
Values of chemical shifts and coupling constants are also presented and briefly discussed.
๐ SIMILAR VOLUMES
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 evalu