Synthesis and spectroscopic properties of cationic Ru(II) arene complexes [Ru(η 6-arene)(P)Cl(L)] +. (P=PPh 3, PEt 3, MePPr i2 and L=4-cyanopyridine or 1,4-dicyanobenzene)

Abstract

Reactions of [Ru(η 6-arene)(P)Cl 2] (P=PPh 3, PEt 3 or MePPr i 2) with organonitriles 4-cyanopyridine or 1,4-dicyanobenzene (referred hereafter as CNPy or DCB) in methanol, in the presence of NH 4PF 6, gives the cationic arene complexes [Ru(η 6-arene)(P)Cl(L)] + (L=CNPy or DCB). The reaction products have been characterized by physico-chemical methods viz., elemental analyses, IR, 1H-, 13C-, 31P-NMR, electronic and FAB mass spectra. The spectral data of the complexes revealed the presence of a pendant nitrile group. These could behave as potential metallo-ligands and could find wide application in the syntheses of homo- or heterobimetallic mixed valence bridged complexes.