ISSN:
1573-9171
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Conclusions 1. The PMR spectra of the compounds (CH3)4−nM(Ri)n, where M=Si, G, and Sn, were compared with the spectra of (CH3)4−nC(Ri)n. 2. For the compounds (CH3)4−nM(Ri)n, where M=Si, Ge, it was found that the chemical shifts of the methyl protons are influenced not only by the induction effect and the effect of magnetic anisotropy of the substituents, but also, in the case Ri=-OCH3, -OC2H5, -CH=CH2, by the effect of dπ-pπ-conjugation. 3. In the correlation of the chemical shifts of the methyl protons with the constants σ*Si, obtained from reaction series containing silicon, an effect ascribed to dπ-pπ-conjugation remains.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00846096
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