A lead-207 and carbon-13 Fourier-transform nuclear magnetic resonance study of organolead compounds

Abstract

Lead-207 and 13C n.m.r. parameters have been obtained for a large number of representative organolead compounds. The lead chemical shifts determined cover a range of ca. 2 500 p.p.m.; similar chemical-shift trends are observed for tin and lead, but the larger lead shift range allows a clearer distinction between closely related species. Carbon-13 chemical shifts and lead-carbon coupling constants also show similar trends to the corresponding shifts and couplings for organotin compounds, but here again the parameters for the lead compounds are generally more sensitive to structural changes; this is particularly so for coupling constants. There is no clear relation between nJ(Sn–C) and nJ(Pb–C).