SYNTHESIS AND CHARACTERIZATION OF ORGANOMOLYBDENUM AND ORGANOTUNGSTENHALIDES CONTAINING THE ETA(5)-PENTAPHENYLCYCLOPENTADIENYL LIGAND ETA(5)-C(5)PH(5)MO(CO)(3)X-CENTER-DOT-NCH(2)CL(2) AND ETA(5)-C(5)PH(5)W(CO)(3)X (X=CL, BR, I) - THE X-RAY MOLECULAR-STRUCTURE OF TA(5)-C(5)PH(5)MO(CO)(3)I-CENTER-DOT-0.5CH(2)CL(2)

Six new organomolybdenum and organotungsten halides with general formu las eta(5)-C(5)Ph(5)Mo(CO)(3)X . nCH(2)Cl(2) and eta(5)-C(5)Ph(5)W(CO) (3)X (X=Cl, Br, I) were synthesized through the reaction of eta(5)-C(5 )Ph(5)M(CO)(3)Li formed from eta(5)-C(5)Ph(5)Li and M(CO)(6) with PCl3 , PBr3 or I-2 and characterized by elemental analysis, IR, H-1 NMR and MS spectroscopies. The structure of eta(5)-C(5)Ph(5)Mo(CO)(3)I . 0.5C H(2)Cl(2) was determined by single-crystal X-ray diffraction technique s. It crystallized in the triclinic space group P (1) over bar with ce ll parameters a=8.476(2), b=10.704(2), c=19.075(4) Angstrom, alpha=84. 20(3), beta=88.42(3), gamma=71.58(3)degrees, V=1633.7(6) Angstrom(3); Z=2 and D-x=1.616 g cm(-3). The final R value was 0.046 for 4161 obser ved reflections.