Heteronuclear magnetic multiple resonance experiments are used to show that the large values of 1J(119Sn31P) found in tertiary phosphine complexes of tin tetrahalides are negative [corresponding to a positive 1K(SnP)], suggesting that the mean excitation energy approximation can provide a valid description of the Fermi contact contribution to this spin coupling interaction, in contrast to the situation
异核磁共振实验表明,在四卤化
锡的叔膦配合物中发现的1 J(119 Sn 31 P)大值为负[对应于正1 K(SnP)],这表明平均激发能近似可以提供费米接触对该自旋耦合相互作用的贡献的有效描述,这与在一个键上其他类型的SnP相互作用的情况相反。