Reactions of SnMe₂-bridged biscyclopentadienes with molybdenum carbonyl to give compounds containing Mo-Sn-Mo units

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• 作者：Bo-Lin Zhu ; ^{bolinzhu@yahoo.com.cn} ; Yuan Li ; Yun-Fei Chen ; Wei Shi
• 关键词：SnMe2-bridged ; Doubly bridged biscyclopentadienyl ligand ; Mo(CO)6 ; Migration ; X-ray diffraction
• 刊名：Polyhedron
• 出版年：2012
• 期刊代码：87_02775387
• 类别：ch
• 出版时间：11 May, 2012
• 卷：38
• 期：1
• 页码：251-257
• 文件大小：666 K

摘要

In the reactions of double-bridged biscyclopentadienes (EMe₂)(SnMe₂)(RC₅H₃)₂ (E = C (1), E = Si (2 or 4), E = Ge (3)), or single-bridged biscyclopentadiene (SnMe₂)(^tBuC₅H₄)₂ (5) with Mo(CO)₆ in refluxing xylene, the bridging SnMe₂ group migrates from the ligand to the molybdenum atoms to give compounds (6-10) containing the Mo-Sn-Mo units; the bridging group EMe₂ (E = C or Si in 1, 2, or 4) does not migrate. It is noteworthy that [(畏⁵-C₅H₅)Mo(CO)₃]₂SnMe₂ (8) obtained from the reaction of (GeMe₂)(SnMe₂)(C₅H₄)₂ (3) with Mo(CO)₆ is a degermylated and SnMe₂ group migrated product, another outcome worth mentioning is that the complex 9 is afforded only in the rac-configuration. The stability of complexes (6, 7, and 10) containing the Mo-Sn-Mo unit toward heat and light was also studied. The molecular structures of 6, 9, and 10 were determined by X-ray diffraction.