coordination of the metal atoms [dPbS 2.491 Å (dSnS 2.401 Å, dPbC 2.19 Å (dSnC 2.129 Å)]. No additional intermolecular contacts have been found. A ring-segment exchange reaction in solution has been observed by NMR. In the resulting equilibrium new cyclic compounds containing both tin and lead atoms with coupling constants 2J(207PbS119Sn) 226 Hz have been detected. FD-mass spectra indicate formation
交替的六元环的晶体结构[PH 2 PBS] 3 - P 2 1 / ç和[PH 2周的SnS] 3 - P 2 1 / Ñ已经由X射线方法测定的。两个杂环表现出c ^ 2 -对称扭曲船式构象与
金属原子[的四面体配位d PbS 2.491埃(d SnS 2.401埃,d PbC 2.19埃(d SnC2.129Å)]。尚未发现其他分子间接触。通过NMR观察到溶液中的环段交换反应。在所得到的平衡同时含有
锡和
铅原子与偶合常数新环状化合物2 Ĵ(207 PbS 119 Sn)的已检测到226赫兹。FD质谱表明形成了二聚体分子单元。