Phosphane-functionalized heavier tetrylenes: synthesis of silylene- and germylene-decorated phosphanes and their reactions with Group 10 metal complexes

摘要

The stable phosphane-functionalized heavier tetrylenes E((t)Bu(2)bzam)pyrmP(t)Bu(2)(E = Si (1(Si)), Ge (1(Ge));(t)Bu(2)bzam =N,N '-ditertbutylbenzamidinate; HpyrmP(t)Bu(2)= ditertbutyl(2-pyrrolylmethyl)phosphane) have been prepared by reacting the amidinatotetrylenes E((t)Bu(2)bzam)Cl (E = Si, Ge) with LipyrmP(t)Bu(2). The reactions of1(Si)and1(Ge)with selected M(0)and M-II(M = Ni, Pd, Pt) metal precursors have allowed the synthesis of square-planar [MCl2{kappa E-2,P-E((t)Bu(2)bzam)pyrmP(t)Bu(2)}] (M = Ni, Pd, Pt; E = Si, Ge), tetrahedral [Ni{kappa E-2,P-E((t)Bu(2)bzam)pyrmP(t)Bu(2)}(cod)] (E = Si, Ge; cod = 1,5-cyclooctadiene) and triangular [M{kappa E-2,P-E((t)Bu(2)bzam)pyrmP(t)Bu(2)}(PPh3)] (M = Pd, Pt; E = Si, Ge) complexes, showing that1(Si)and1(Ge)are excellentSi,P- andGe,P-chelating ligands that, due to their large steric bulk, are able to stabilize three-coordinate Pd(0)and Pt(0)complexes.