Synthesis, characterization, and redox behavior of six-coordinate (por)Ru(NO)Cl compounds (por = porphyrinato dianion)

A new high-yield preparative route to (por)Ru(NO)Cl compounds (por = porphyrinato dianion) from reactions of (por)Ru(NO)(alkoxide) precursors with boron trichloride is reported. These ruthenium nitrosyl chloride complexes are known to be useful precursors to (por)Ru(NO)-containing derivatives. The crystal structure of (OEP)Ru(NO)Cl (OEP = octaethylporphyrinato dianion) shows that the RuNO linkage is linear. The redox behavior of the (por)Ru(NO)Cl compounds has been determined by cyclic voltammetry. Analysis of the data reveals that the first oxidation of the (por)Ru(NO)Cl compounds is porphyrin-ring centered.

The (por)Ru(NO)Cl derivatives (por = porphyrinato dianion) are obtained in high yields from the reactions of the precursor (por)Ru(NO)(alkoxide) compounds with boron trichloride in dichloromethane. Analysis of the cyclic voltammograms of the (por)Ru(NO)Cl compounds reveals that the first oxidation of these compounds is porphyrin-ring centered.Figure optionsDownload as PowerPoint slide