Structural Determination of Ruthenium Complexes Containing Bi-Dentate Pyrrole-Ketone Ligands

摘要

A series of ruthenium compounds containing a pyrrole-ketone bidentate ligand, 2-(2′-methoxybenzoyl)pyrrole (>1), have been synthesized and characterized. Reacting >1 with [(η⁶-cymene)RuCl2]2 and RuHCl(CO)(PPh3)3 generated Ru(η⁶-cymene)[C4H3N-2-(CO-C6H4-2-OMe)]Cl (>2) and {RuCl(CO)(PPh3)2[C4H3N-2-(COC6H4-2-OMe)]} (>3), respectively, in moderate yields. Successively reacting >2 with sodium cyanate and sodium azide gave {Ru(η⁶-cymene)[C4H3N-2-(CO-C₆H₄-2-OMe)]X} (>4, X=OCN; >5, X=N₃) with the elimination of sodium chloride. Compounds >2–>5 were all characterized by ¹H and ¹³C-NMR spectra and their structures were also determined by X-ray single crystallography.