Preparations and Characterization of Cycloruthenated Complexes Derived from 1-Phenylpyrazole, 2-Phenylpyridine, and Benzo[<i>h</i>]quinoline

Abstract

Abstract A pale yellow solution, prepared from RuCl3·3H2O and carbon monoxide in 2-methoxyethanol, reacted with 1-phenylpyrazole (Hphpz), 2-phenylpyridine (Hphpy), and benzo[h]quinoline (Hbzqn) to give new chlorobridging dinuclear cycloruthenated complexes, [{RuCl(C∼N)(CO)2}2] (C∼N=cycloruthenated moiety). These complexes reacted with Tl(acac) (acac=acetylacetonato ligand), γ-picoline (pic), and triphenylphosphine resulting in the break-down of the chloro-bridging bond of the complexes, and afforded new mononuclear cycloruthenated complexes, [Ru(acac)(C∼N)(CO)2], [RuCl(C∼N)(CO)2(pic)], and [RuCl(C∼N)(CO)n-(PPh3)3−n] (n=2 for phpz, and n=1 for phpy and bzqn), respectively. The complexes prepared in this study were characterized by IR, 1H-NMR, and mass spectroscopies.