1,1'-(tetra-Me disilanediyl)-bis(cyclopentadienyllithium). Then the later reacted with hexacarbonylmolybdenym to generate the title compd, (Me2SiSiMe2)[CpMo(CO)3-Li+]2 (I). I reacted with four alkyl halides resp. to yield the alkylation products on Mo-atom, (Me2SiSiMe2) [CpMo(CO)3R]2(R = CH3, C2H5, PhCH2, CH2COOO2H5 (II)]. I was treated with HOAc and then reacted with CCl4 and NBS resp. to yield the corresponding molybdenum chloride and bromie. Oxidative coupling reaction was happened when the solution of I was treated with Fe2(SO4)3/H3+O and the dinuclear Mo-Mo complex (Me2SiSiMe2)[CpMo(CO)3]2 (III) was formed. III reacted with iodine in chloroform to produce the Mo-Mo bond cleaved product, (MeSiSiMe2)[CpMo(CO)3I]2. The crystal and mol. structure of II were determine by x-ray diffraction method.

Key words: CRYSTAL STRUCTURE DETERMINATION, INFRARED SPECTROPHOTOMETRY, ELEMENTAL ANALYSIS, CYCLOPENTADIENE P, COPPER COMPLEX, PROTON MAGNETIC RESONANCE SPECTROMETRY, CARBONYL COMPOUNDS, DISILANE P