The title compounds were synthesized via some reactions of tricarbonyl pentamethyldisilanylcyclopentadienyl molybdenum anion salt. Their structures were characterized by elemental analyses, IR and 1H NMR spectra. Furthermore, the crystal structures of complexes h-Me5Si2C5H4Mo(CO)3Br and [h-Me5Si2C5H4Mo(CO)3]2 were determine by x-ray diffraction.

Key words: CRYSTAL STRUCTURE DETERMINATION, MOLECULAR STRUCTURE, CYCLOPENTADIENE P, MOLYBDENUM COMPLEX, COUPLING REACTION, ORGANO SILICON COMPOUNDS, DINUCLEAR COMPLEX