Two new ruthenium(II) complexes with cyclometalated 2-phenylpyridine ligands

Abstract

The reaction of Ru3(CO)12 and 2-phenylpyridine (Hppy) in hot methanol yields the dinuclear ruthenium(II) complex [Ru(OCH 3)(ppy)(CO)2]2 (3) in moderate yield. Heating of Ru3(CO)12 and Hppy in a cyclohexane-dimethoxyethane mixture generates the mononuclear complex [Ru-cis-(ppy)2-cis-(CO) 2] (2). When 2 is treated with methanol at elevated temperature, only partial conversion into 3 can be achieved. The structures of complexes 2 (two polymorphs) and 3 were established by X-ray diffraction analysis. © 2008 Verlag der Zeitschrift für Naturforschung, Tübingen.