Syntheses of iron-containing heterometallic complexes using tridentate phosphine ligands; the crystal structure of [(OC)3Fe{(Ph2P)2CHCH2PPh2}Ru3(CO)9{Ph2PC(CH2)PPh2}]

Abstract

Treatment of [Fe(CO)₃(dppee)][dppee = 1,1-bis(diphenylphosphino)ethene] with PPh₂H gives the addition product [Fe(CO)₃{(Ph₂P)₂CHCH₂PPh₂}]1. The unco-ordinated phosphine group of complex 1 reacts with [{RhCl(CO)₂}₂] to give [(OC)₄Fe{Ph₂PCH(PPh₂)CH₂PPh₂}RhCl]3via[(OC)₃Fe{(Ph₂P)₂CHCH₂PPh₂}Rh(CO)Cl₂Rh(CO)₂]2. Complex 1 reacts with [Ru₃(CO)₁₀(dppee)] to give the heterometallic complex [(OC)₃Fe{(Ph₂P)₂CHCH₂PPh₂}Ru₃(CO)₉(dppee)]4 the structure of which has been determined by X-ray crystallography.