Possibilities of 1,1-dimethylsilole as a ligand in transition-metal chemistry

Article abstract of DOI:10.1021/om50006a043

1,1-Dimethylsilole is an effective ligand for transition-metal complexes. Direct displacement of carbonyl ligands from Fe₂(CO)₉ and Co₂(CO)₈ results in the stable complexes (η⁴-C₄H₄SiMe₂)Fe(CO)₃ and [(η⁴-C₄H₄SiMe₂)(CO) ₂Co]₂, respectively. (η⁴-C₄H₄SiMe₂)-(CO) ₃Fe undergoes carbonyl replacement with PPh₃. Cleavage of the cobalt-cobalt bond is achieved with both iodine and sodium amalgam. The anion obtained from the reduction with sodium amalgam displaces chloride in Ph₃SnCl. Displacement of 1,5-cyclooctadiene in (1,5-COD)₂Ni and (1,5-COD)Mo(CO)₄ affords the Ni⁰ sandwich complex (η⁴-C₄H₄SiMe₂)₂Ni and the molybdenum complex (η⁴-C₄H₄SiMe₂) ₂Mo(CO)₂, respectively.