Magnesium Complexes of Bis(phosphinimine)methane and -methanide Ligands

Mg complexes of bis(phosphoranimine)methane and -methanide ligands have been characterized. Reaction of CH 2 (Ph 2 PNSiMe 3 ) 2 with MeMgI and MeMgCl gave the crystalline products CH 2 (Ph 2 PNSiMe 3 ) 2 MgI 2 ( 1 ) and [HC(Ph 2 PNSiMe 3 ) 2 Mg(μ-Cl)] 2 ( 2 ), respectively. The related reaction of LiCH(Ph 2 PNSiMe 3 ) 2 with MeMgI afforded CH(Ph 2 PNSiMe 3 ) 2 MgI(THF) ( 3 ). Crystallographic data for 1 − 3 confirm a significant Mg−C interaction in complexes containing bis(phosphoranimine)methanide ligands.