(Carbaborane)rhodium-copper and -manganese complexes: Crystal structure of [RhCu(PPh 3)(cod)(η 5-7,8-C 2B 9H 9Me 2)

Abstract

Treatment of [CuCl(PPh 3)] with [NEt 4][Rh(cod)(η 5-7,8-C 2B 9H 9Me 2)] (cod = cyclo-octa-1,5-diene) in CH 2Cl 2 in the presence of TlBF 4 affords the dimetal compound [RhCu(PPh 3)(cod)(η 5-7,8-C 2B 9H 9Me 2)], the structure of which has been established by X-ray diffraction (RhCu 2.633(2) Å, RhCuP 153.3(1)°). Reactions between [MnBr(CO) 5] and the tetraethylammonium salts of the complexes [Rh(CO)(PPh 3)(η 5-7,8-C 2B 9H 9Me 2)] - and [Rh(cod)(η 5-7,8-C 2B 9 H 9Me 2)] − yield the dimetal compounds [MnRh(CO) 5(L)(η 5-7,8-C 2B 9H 9Me 2)] (L=PPh 3 or CO) respectively. Treatment of [Mn(CO) 2(NO)(η 5-C 5H 4Me)][BF 4] with [NEt 4][Rh(CO)(PPh 3)(η 5-7,8-C 2B 9H 9Me 2)] affords [Rh(NO)(PPh 3)(η 5-7,8-C 2B 9H 9Me 2)], in an unusual reaction involving transfer of the NO ligand from manganese to rhodium.