Metalloporphyrin as a ligand in organometallic complexes: Synthesis and characterization of a nickel(II) porphyrin complex of 1,5-cyclooctadienedichlororuthenium(II)

A method for the synthesis of dinuclear metal complexes has been developed which utilizes the multichelating porphyrin ligand, α,α-5,15-bis(o-nicotinoylphenyl)-2,8,12,18-tetraethyl-3,7,13,17-tetramethylporphyrin, H2[DPE]-(py)2 (di[o-nicotinoylphenyl]etioporphyrin). In addition to the porphyrin site, the two terminal pyridyl groups of the ligand serve as an additional chelate. The two metal binding sites are chemically different and can be used to bind different metal centers. The versatility of this ligand is demonstrated by fabricating a heterobimetallic complex, [Ni(DPE)-(py2)]Ru(COD)Cl2, composed of a porphyrin coordination complex linked to an organometallic fragment.