Synthesis and structure of the diynyl complexes [Mo(CCCCR)L2(η-C7H7)], L2 = chelate N- or P-donor ligand, R = SiMe3 or H: X-ray crystal structures of [Mo(CCCCSiMe3)(2,2′-bipyridine)(η-C7H7)] and [Mo(CCCCH)(Ph2PCH2CH2PPh2)(η-C7H7)]

The synthesis and characterisation of new butadiynyl complexes of the electron-rich cycloheptatrienyl molybdenum auxiliaries MoL2(η-C7H7), L2 = chelate N- or P-donor ligand, is reported.