The chemistry of hetero-allene and -allylic derivatives with rhodium and iridium II. Rhodium(I)- and iridium(i)-phosphine complexes of hetero-allylic ligands of the type [Ph2PC(x)NR]− (X = S, NR, O) and [Ph2P(W)C(S)NR]− (Q = S, O). Synthesis and 31P-NMR
作者:D.H.M.W Thewissen、H.P.M.M. Ambrosius、H.L.M. Van Gaal、J.J. Steggerda
DOI:10.1016/s0022-328x(00)93336-9
日期:1980.6
[Ph2PC(X)NR]− (X = S, NR, O) and [Ph2P(Q)C(S)NR]− (Q = S, O) have been shown to react with rhodium(I)- and iridium(I)-phosphine compounds to give stable complexes M(PPh3)2[Ph2PC(X)NR] (A) and M(PPh3)2[Ph2P(Q)C(X)NR] (B) (M = Rh, Ir) in which the ligands are bidentate. P, S(P) and O(P) are always coordinated and the coordination preference of the other atoms is: S > NR > O.
The rhodium(I) complexes (Ph3P)2Rh[Me2NC(S)NC(S)NMe2], (Ph3P)2Rh[SC(S)NMe2] and (Ph3P)2Rh[PhNC(S)NMe2] react with O2 to give 1/1 dioxygen adducts. In solution, trans-(Ph3P)2Rh(O2)[Me2NC(S)NC(S)NMe2], cis- and trans-(Ph3P)2Rh(O2)[SC(S)NMe2] and cis- and trans-(Ph3P)2Rh(O2)[PhNC(S)NMe2] are observed. For (Ph3P)2Rh(O2)[PhNC(S)NMe2], there is a solvent effect on the initial cis—trans ratio and the rate