The structures of [RhLLâ²(μ-X)}2] [LLâ² = cod, (CO)2, (CO)(PPh3) or P(OPh)3}2; X = mt or taz], prepared from [RhLLâ²(μ-Cl)}2] and HX in the presence of NEt3, depend on the auxiliary ligands LLâ². The head-to-tail arrangement of the two N,S-bridges is accompanied by a rhodium-eclipsed conformation for the majority but the most hindered complex, [Rh[P(OPh)3]2(μ-taz)}2], uniquely adopts a sulfur-eclipsed structure. The least hindered complex, [Rh(CO)2(μ-mt)}2], shows intermolecular stacking of mt rings in the solid state. The complexes [RhLLâ²(μ-X)}2] are chemically oxidised to trinuclear cations, [(RhLLâ²)3(μ-X)2]+, most probably via reaction of one molecule of the dimer, in the sulfur-eclipsed form, with the fragment [RhLLâ²]+ formed by oxidative cleavage of a second.
[RhLL−2(μ-X)}2] [LL−−2 = cod, (CO)2, (CO)(PPh3) 或 P(OPh)3}2 的结构; X = mt 或 taz],由 [RhLL‐(μ-Cl)}2] 和 HX 在 NEt3 存在下制备,取决于辅助
配体 LL‐2。两个 N,S 桥的首尾排列伴随着大多数但最受阻的复合体的
铑蚀构象,[Rh[P(OPh)3]2(μ-taz)}2 ],独特采用
硫蚀结构。最小受阻配合物 [Rh(CO)2(μ-mt)}2] 显示固态 mt 环的分子间堆积。配合物 [RhLLâ²(Î⁄-X)}2] 被
化学氧化为三核阳离子,[(RhLLâ²)3(Î⁄-X)2]+,很可能是通过二聚体的一个分子的反应,在
硫重叠形式,其中第二个氧化裂解形成片段[RhLL-]+。