Heteronuclear magnetic double resonance studies of 119Sn chemical shifts in ethyltin derivatives

Abstract

Tin chemical shifts in 32 ethyltin compounds dissolved in inert solvents have been determined by ¹H–{¹¹⁹Sn} double resonance experiments. High-field shifts are found when an unsaturated group is attached to tin and this indicates that π-bonding involving the tin 5d-orbitals is important. It may be possible to account for the chemical shifts of the halogenated derivatives without invoking π-bonding between tin and the halogen.