Magnetic double resonance studies of tin-119 chemical shifts in compounds with tin–sulphur bonds and related species

Abstract

Tin-119 chemical shifts and selected other n.m.r. parameters are reported for 103 compounds, many of which are hitherto unreported species. The effects of changing a group at a site remote from the tin atom depends upon the substituents on tin and this is attributed to the mobility of the electrons in groups such as phenyl and to a degree of π-interaction with the tin atom. In series SnX_nY_4–n the departure from linearity of plots of δ(¹¹⁹Sn) against n depends partly upon the electronegativity difference between X and Y, but also upon other factors. A method of obtaining a quantitative estimate of this deviation is presented.