Ab initio method with Lanl2DZ basis sets has been used to optimize the possible geometries of the triearbonyl trimethylsilyl- cyclopentadienyl molybdenum anion [ ( Me3SiC5H4 ) Mo(CO) 3 ]^ - ( Ⅰ ) and triearbonyl trimethylsilyl eyclopentadienyl molybdenum-hydrogen [ (Me3SiC5H4) MoH(CO) 3 ] ( Ⅱ ) complexes. The single point energy calculation results show that the most stable geometries of ( Ⅰ) and ( Ⅱ ) complexes are the configuration where the molybdenum is located above the eyelopentadienyl ring. The calculated vibrational ...