SYNTHESIS AND REACTIVITY OF HYDRIDO, HALOGENO, AND SIGMA-ORGANYL RUTHENATETRABORANES - CRYSTAL-STRUCTURE OF [RUH(B3H8)(CO)(PPH3)2]

The reactions of [RuClR(CO)(PPh3)n] (n = 2, R = sigma-vinyl, sigma-aryl; n = 3, R = H) with NMe4[B3H8] provide the ruthenatetraboranes [RuR(B3H8)(CO)(PPh3)2]. The crystal structure was determined for the compound with R = H. The latter reacts with N-halogeno succinimides to give the halogeno derivatives [RuR(B3H8)(CO)(PPh3)2] (R = Cl, Br, I) and with tBuNC in dichloromethane to give [RuClH(CNtBu)2(PPh3)2]. Sodium dialkyldithiocarbamate displaces the B3H8 moiety from the halogeno derivatives, with formation of [Ru(S2CNMe2)2(CO)(PPh3)]