Syntheses and crystal structures of ruthenium carbonyl complexes containing pyridine-alkoxide ligands

Abstract

The reactions of pyridine alcohols PyCH 2 C(R 1 R 2 )OH [R 1 \u2009=\u2009H, R 2 \u2009=\u20094-BrC 6 H 4 ( 1 ); R 1 \u2009=\u2009H, R 2 \u2009=\u20094-CF 3 C 6 H 4 ( 2 ); R 1 \u2009=\u2009CH 3 ; R 2 \u2009=\u2009Ph ( 3 )] with Ru 3 (CO) 12 in refluxing toluene gave three mononuclear ruthenium carbonyl complexes [PyCH\u2009=\u2009C(4-BrC 6 H 4 )O] 2 Ru(CO) 2 ( 4 ), [PyCH\u2009=\u2009C(4-CF 3 C 6 H 4 )O][PyCH\u2009=\u2009C(4-CF 3 C 6 H 4 )]Ru(CO) 2 ( 5 ), [PyCH\u2009=\u2009C(4-CF 3 C 6 H 4 )O] 2 Ru(CO) 2 ( 6 ) and one dinuclear ruthenium carbonyl complexes [PyCH 2 C(CH 3 )(Ph)O] 2 Ru 2 (CO) 4 ( 7 ). Four new complexes 4 – 7 were characterized by elemental analysis, IR, 1 H NMR and 13 C NMR spectroscopy. The molecular structures of these complexes were determined by X-ray crystal diffraction analysis.