207Pb Satellite spectra and207Pb–H long-range coupling constants of the symmetrical isomers of tetrafuryl- and tetrathienyl-lead
- 1 January 1972
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Perkin Transactions 2
- No. 3,p. 262-265
- https://doi.org/10.1039/p29720000262
Abstract
The 1H n.m.r. spectra and the 207Pb satellite bands of the two symmetrical isomers of tetrafuryl- and tetrathienyl-lead have been analysed and all the coupling constants and proton chemical shifts derived. The relative signs of long-range J(207Pb–H) coupling constants appear to be alike, as may be seen by comparing experimental and simulated spectra. Proton chemical shifts can be interpreted in terms of some degree of (d–p)π interactions, while proton–proton coupling constants seem to be only slightly affected by such perturbation. Long-range J(207Pb–H) coupling constants were found to be mainly determined by the Fermi contact mechanism.Keywords
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