Search

The reaction of the [(η5-C5Me5)MoCl4] complex with [LiBH4·THF] in toluene at -70 °C, followed by pyrolysis at 110 °C, afforded dark brown [(η5-C5Me5Mo)3MoB9H18], 2, in arallel with Ihe known [(η5-C5Me5Mo)2B5H9], 1. Compound 2 has been charactedzed in solution by ¹H, 11B, and 13C NMR spectroscopy and elemental analysis, and the structural types were unequivocally eslablished by crystallographic studies. The title compound represents a novel class of vertex-fused clusters in which a Mo atom has been fused in a perpendicular fashion between two molybdaborane clusters. Electronic structure calculations employing density functional theory yield geometdes in agreement with the structure determinations, and on grounds of density functional theory calculations, we have analyzed the bonding patterns in the structure. [ABSTRACT FROM AUTHOR]

The reaction of [Cp*MoCl4] with an excess of LiBH4, followed by thermolysis with tellurium powder in toluene, afforded a tricapped cubane cluster, [(Cp*Mo)4B4H4(μ4-BH)3] (1), which represents an unprecedented metal-rich metallaborane cluster with a cubane core containing 58 cluster valence electrons (cve) and three metal-metal bonds. [ABSTRACT FROM AUTHOR]