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Group IVB organometallic compounds of furan: 13C, 29Si and 119Sn n.m.r. Spectra

✍ Scribed by M. Mägi; E. Lippmaa; E. Lukevics; N. P. Erĉak


Publisher
John Wiley and Sons
Year
1977
Tongue
English
Weight
324 KB
Volume
9
Category
Article
ISSN
0749-1581

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✦ Synopsis


Abstract

The ^13^C, ^29^Si and ^119^Sn chemical shifts of 2‐ and 2,5‐substituted organometallic (M=C, Si, Ge, Sn, Pb) derivatives of furan were measured. The most important factors, determining the specific features of the studied spectra, are d‐orbital availability and atomic radius of the central atom M, as well as the relatively higher (as compared with benzene) energies of the π‐electron energy levels of the furan ring.


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Steric effects in 29Si and 13C n.m.r. sp
✍ J. Schraml; V. Chvalovský; H. Jancke; G. Engelhardt 📂 Article 📅 1977 🏛 John Wiley and Sons 🌐 English ⚖ 171 KB

## Abstract ^29^Si and ^13^C NMR spectra of trimethylphenoxysilane and three bis(trimethylsiloxy)benzenes have been investigated. Crowding in the __ortho__ derivative leads to a small but observable deshielding of both silicon and carbon nuclei of the trimethylsiloxy group. In comparison to analogo