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Treatment of [( η  6 - p -cymene)RuCl 2 ] 2  with one equivalent of chlorodiphenylphosphine in tetrahydrofuran at reflux afforded a neutral complex [( η  6 - p -cymene)RuCl 2 ( κ  1 - P -PPh 2 OH)] ( 1 ). Similarly, the reaction of [Ru(bpy) 2 Cl 2 ·2H 2 O] (bpy = 2,2′-bipyridine) and chlorodiphenylphosphine in methanol gave a cationic complex [Ru(bpy) 2 Cl( κ  1 - P -PPh 2 OCH 3 )](PF 6 ) ( 2 ), while treatment of [RuCl 2 (PPh 3 ) 3 ] with [2-(C 5 H 4 N)CH=N(CH 2 ) 2 N(CH 3 ) 2 ] ( L1 ) in tetrahydrofuran at room temperature afforded a ruthenium(II) complex [Ru(PPh 3 )Cl 2 ( κ  3 - N , N , N - L1 )] ( 3 ). Interaction of the chloro-bridged complex [Ru(CO) 2 Cl 2 ]  n   with one equivalent of [Ph 2 P( o -C 6 H 4 )CH=N(CH 2 ) 2 N(CH 3 ) 2 ] ( L2 ) led to the isolation of [Ru(CO)Cl 2 ( κ  3 - P , N , N - L2 )] ( 4 ). The molecular structures of the ruthenium(II) complexes  1 – 4  have been determined by single-crystal X-ray crystallography. The properties of the ruthenium(II) complex  4  as a hydrogenation catalyst for acetophenone were also tested.

zeitschrift für naturforschung b

Synthesis, structural characterization and catalytic activity of chlororuthenium(II) complexes with substituted Schiff base/phosphine ancillary ligands