A nido-6-manganadecaborane salt.
A new manganadecaborane has been isolated as a previously unsuspected product from the reaction of [Mn(CO)(5)Br] with K[B(9)H(14)]. The anion of tetrabutylammonium 5-bromo-6,6,6-tricarbonyl-6-manganadodecahydrodecaborate(1-), (C(16)H(36)N)[Mn(B(9)H(12)Br)(CO)(3)], has a nido cage structure. The Mn atom is bonded through three B--Mn bonds of similar length [2.221 (4), 2.224 (3) and 2.236 (3) A] and two bridging H atoms. The position of the bromo substituent breaks the twofold symmetry of the cage found in simple analogues, and this is reflected in the B--B bond parameters.
Department of Pure and Applied Chemistry, University of Strathclyde, Glasgow G1 1XL, Scotland. a.r.kennedy@strath.ac.uk
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Morris