名称:
Rhoda- and iridacarborane halide complexes (η-9-SMe2-7,8-Me2-7,8-C2B9H8)MX2 (M = Rh, Ir; X = Cl, Br, I)
摘要:
Reaction of (eta-9-SMe2-7,8-Me-2-7,8-C2B9H8)M(cod) with hydrohalic acids affords the 16-valence-electron complexes (eta-9-SMe2-7,8-Me-2-7,8-C2B9H8)MX2 (M = Rh, X = Cl (3a), Br (3b), I (3c); M = Ir, X = Cl (4a), Br (4b), I (4c)). According to X-ray analysis, 3a, 3b, 4b, and 4c have monomeric pseudocloso-structures with a long cage C center dot center dot center dot C distance (2.122, 1.985, 2.238, and 2.186 angstrom, respectively), in contrast to dimeric closo-structures of the cage-non-methylated analogs. The structural difference was explained using DFT calculations. 3b and 4b react with SMe2 and Tl[Tl(eta-7,8-C2B9H11)] giving closo-metallacarboranes (eta-9-SMe2-7,8-Me-2-7,8-C2B9H8) M(SMe2)Br-2 (M = Rh (5), Ir (6)) and (h-9-SMe2-7,8-Me-2-7,8-C2B9H8) M(h-7,8-C2B9H11) (M = Rh (7), Ir (8)). (C) 2013 Elsevier B. V. All rights reserved.