Preparation and characterization of novel tris-α-di-imino-complexes of ruthenium(0) and ruthenium(II). X-Ray crystal and molecular structure of the electron-rich complex tris-[1,2-bis-(p-methoxy-phenyliminoethane)]ruthenium(0)–toluene

Abstract

The reaction between [RuH₂(PPh₃)₄] or[RuH-(C₆H₄PPh₂)(PPh₃)₂(C₂H₄)] and the α-di-imine dad [(p-Me-OC₆H₄NCH)₂] produces in high yield the black crystal line complex [Ru(dad)₃]⁰, a formally 20-electron derivative of ruthenium (0), the structure of which has been confirmed by an X-ray study; the complex is diamagnetic in the solid state and is rapidly oxidized by molecular oxygen into [Ru(dad)₃]²⁺.