Isocyanide complexes of rhodium and iridium. Part I. Tetrakisisocyanide species, their oxidative addition reactions, and some allyl complexes

James W. Dart, Malcolm K. Lloyd, R. Mason, Jon A. McCleverty

Journal of the Chemical Society Dalton Transactions · 1973 · 43 citations · 0 references

Concepts

Abstract

The rhodium(I) and iridium(I) isocyanide complexes [M(CNR)4]Z (M = Rh, Z = PF6, R = Me, Pri. cyclohexyl, But, p-MeOC6H4, p-MeC6H4, or p-ClC6H4; M = Rh, Z = Cl, R = But or p-ClC6H4; M = Ir, Z = PF6, R = But or p-ClC6H4) have been prepared. These undergo oxidative addition reactions giving trans-[M(CNR)4XY]+(various R; X = Cl, Y = Cl, PhCH2, C3H5, C3H4Me, MeCO, HgCl, or SnCl3; X = Br, Y = Br, CN, PhCH2, or C3H5; X = I, Y = I, Me, CF3, or C3F7). Addition of NO+, p-MeC6H4N2+, or SO2 afforded [Rh(NO)(CNR)4][PF6]2(R = Pri, cyclohexyl, or But), [Rh{N2(p-MeC6H4)}(CNBut)4][PF6]2 and [Rh(SO2)(CNR)4][PF6](R = Pri or p-MeC6H4), respectively. Treatment of [Rh(π-C3H6)2Cl]2 with one or two moles of RNC (R =p-MeC6H4), afforded either [Rh(π-C3H5)2(CNR)Cl] or [Rh(π-C3H5)(σ-C3H5)(CNR)2Cl].