Heteronuclear double resonance: 119Sn–13C spin–spin coupling in organotin compounds

Abstract

The nuclear magnetic resonance spectra of a series of methyltin halides containing ¹³C, ¹¹⁷Sn, and ¹¹⁹Sn in natural abundance have been measured. In all cases the reduced coupling constant K(¹¹⁹Sn–¹³C) is positive, and K(¹¹⁹Sn–¹H) is negative. There is an approximately linear correlation between J(¹¹⁹Sn–¹³C) and J(¹¹⁹Sn–¹H) but the form of the relationship indicates that terms other than the Fermi contact interaction must make an appreciable contribution to at least one of the two coupling constants.