[Os(MR3)(CO)4}2](MR3= SiMe3 or SiEt3) with cycloheptatriene or cyclohepta-1,3-diene yields cycloheptadienyl complexes [Os(MR3)(CO)2(1–5-η-C7H9)] as major products, and bridging cycloheptatrienyl complexes [Os2(MR3)(CO)5-(1–2,3–4-η : 5–7-η-C7H7)]. In their i.r. spectra the cycloheptadienyl complexes exhibit three carbonyl stretching bands; and temperature-dependent 1H n.m.r spectra, attributed to restricted
化合物[OS(MR 3)2(CO)4 ](MR 3 = SiMe 3,Sime 2 Ph或GeMe 3)或[OS(MR 3)(CO)4 } 2 ](MR 3 =森达3或SIET 3)与
环庚三烯或环庚-1,3-二烯的产率环庚二烯基配合物[OS(MR 3)(CO)2(1-5-η-C 7 H ^ 9)]作为主要产品,和桥接
环庚三烯基络合物[OS 2(MR 3)(CO)5-(1–2,3–4-η:5–7-η-C7 H 7)]。在它们的红外光谱中,环庚二烯基配合物表现出三个羰基拉伸带。与温度相关的1 H nmr光谱,归因于围绕cy-
氯庚二烯键的旋转受限,从而允许存在构象异构体,这些异构体在环境温度下可以快速相互转化,但在低温下可在nmr时间尺度上观察到。复合物的某些反应[OS(森达3)(CO) 2(1-5-η-C 7 H ^ 9)]已stuied。