Synthesis and characterization of organomolybdenum and organotungsten halides containing the η5-pentaphenylcyclopentadienyl ligand η5-C5Ph5Mo(CO)3X·nCH 2Cl2 and η5-C5Ph5W(CO)3X (X=C1, Br, I).

Article abstract of DOI:10.1016/0020-1693(95)04788-3

Six new organomolybdenum and organotungsten halides with general formulas η⁵-C₅Ph₅Mo(CO)₃X·nCH ₂Cl₂ and η⁵-C₅Ph₅W(CO)³X (X=Cl, Br, I) were synthesized through the reaction of η⁵C₅Ph₅M(CO)₃Li formed from η⁵-C₅Ph₅Li and M(CO)₆ with PCl₃, PBr₃ or I₂ and characterized by elemental analysis, IR, ¹H NMR and MS spectroscopies. The structure_of η⁵-C₅Ph₅Mo(CO) ₃I·0.5CH₂Cl₂ was determined by single-crystal X-ray diffraction techniques. It crystallized in the triclinic space group P1 with cell parameters a=8.476(2), b=10.704(2), c=19.075(4) A, α=84.20(3), β=88.42(3), γ=71.58(3)°, V=1633.7(6) A³; Z=2 and D_x=1.616 g cm^-3. The final R value was 0.046 for 4161 observed reflections.