Journal of Organometallic Chemistry p. 327 - 332 (1987)
Update date:2022-08-16
Topics:
Sormunen, Pekka
Iiskola, Eero
Vaehaesarja, Eila
Pakkanen, Tuula T.
Pakkanen, Tapani A.
The effect of complexation with a Lewis acid, AlEt3, and alkylation on the chemical shift of silyl ethers has been studied using 29Si NMR spectroscopy.The substitution of a methoxy group for an ethyl group shifts the 29Si signal on an average by 36.9 ppm to lower field, and the signal for the complexed silyl ether is usually shifted to lower field compared with that for the uncomplexed ether, the shift varying between -1.4 and 18.1 ppm.Dynamic processes have been observed for some of the spectra; this is interpreted in terms of competition of Al acceptors for the several silyl ethers simultaneous present.
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