Preparation and organometallic complexes of the new unsymmetrical ligand: Ph_2PNHC_6H_4PPh_2

摘要

Deprotonation of (2-diphenylphosphino)benzeneamine with BuLi followed by reaction with ClPPh_2 in THF gave Ph_2PNHC_6H_4PPh_2 in good yields. The new unsymmetrical ligand has been incorporated into a number of complexes [[Rh{Ph_2PNHC_6H_4PPh_2}(cod)][ClO_4] 2, RhCl_2(#eta#~5-C_5Me_5){Ph_2PNHC_6H_4PPh_2-P_(N)} 3, [RhCl(#eta#~5-C_5Me_5{Ph_2PNHC_6H_4PPh_2-P_(N),P}][Cl]4, IrCl_2(#eta#~5-C_5Me_5){Ph_2PNHC_6H_4PPh_2-P_{N}} 5, RuCl_2(#eta#~6-MeC_6H_4~iPr){Ph_2PNHC_6H_4PPh_2-P_(N)} 6, [RuCl(#eta#~6-Me-c_6h_4~iPr){Ph_2PNHC_6H_4PPh_2-P_(N),P}][BF_4] 7, RuCl_2(#eta#~6-C_6Me_6){Ph_2PNHC_6H_4PPh_2-P_(N)} 8, [RucL(#eta#~6-C_6Me_6){Ph_2PNHC_6-H_4PPh_2-P_(N),P}][BF_4] 9, RuCl_2(#eta#~3:#eta#~3-C_(10)H_(16)){Ph_2PNHC_6H_4PPh_2-P_(N)} 10, OsCl_2(#eta#~6-MeC_6H_4~iPr){Ph_2NHPC_6H_4PPh_2-P_(N)}11] to demonstrate its coordination behaviour as a monodentate or as a chelate ligand. The X-ray structures of for 5, 9 and 10 are reported.