Unusual organic chemistry of a metallaborane substrate: formation of a tantalaborane complex with a bridging acyl group (mu-eta(2)).
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.
Bose
Shubhankar Kumar
SK
Department of Chemistry, Indian Institute ofTechnology Madras, Chennai 600 036, India.
Geetharani
K
K
Varghese
Babu
B
Ghosh
Sundargopal
S