Silicon-29 and carbon-13 NMR studies of organosilicon chemistry. II—The Methylethoxysilanes MenSi(OEt)4−n

Silicon-29, carbon-13 and oxygen-17 NMR data are reported for the methylethoxysilanes, Me_nSi(OEt)_4?n with n = C to 3. The values of ¹J(SiC) vary greatly, in a manner which appears to be inconsistent with an effect of s-character variation alone. The chemical shifts are discussed in terms of possible π-bonding. Silicon-29 and carbon-13 spin-lattice relaxation times and nuclear Overhauser effects are also reported and discussed.