title: Unusual organic chemistry of a metallaborane substrate: formation of a tantalaborane complex with a bridging acyl group (mu-eta(2)).
abstract: The addition of LiBH(4).THF to Cp*TaCl(4) (1; Cp* = eta(5)-C(5)Me(5)) at -40 degrees C, followed by mild pyrolysis with excess BH(3).THF, results in the formation of the mu-acyl complex (Cp*Ta)(2)B(4)H(8)(mu-eta(2)-COCH(3)) (2). The title compound represents a novel class of mu-acyl complexes in which the bicapped-tetrahedral unit (Cp*Ta)(2)B(4)H(8) is bridged by a mu-eta(2)-COCH(3) acyl ligand.
authors.affiliation: Department of Chemistry, Indian Institute ofTechnology Madras, Chennai 600 036, India.
authors.forename: Shubhankar Kumar
authors.initials: SK
authors.lastname: Bose
authors.forename: K
authors.initials: K
authors.lastname: Geetharani
authors.forename: Babu
authors.initials: B
authors.lastname: Varghese
authors.forename: Sundargopal
authors.initials: S
authors.lastname: Ghosh