The neutral complexes [Ru(CO)(dpa)(PR 3 )Cl 2 ] (R = Ph (1) or p-tol (2); dpa = 2,2 0 -dipyridylamine) were synthesized by the reaction of [Ru(CO)(dmf)(PR 3 ) 2 Cl 2 ] (dmf = N,N-dimethylformamide) and the dpa ligand, while the cationic carbonyl hydride complexes [Ru(CO) (N-N)(PPh 3 ) 2 (H)]Cl were synthesized by reaction of [Ru(CO)(PPh 3 ) 3 Cl(H)] and the appropriate N-N ligand [N-N = 2,2 0 -bipyridine = bipy (3), 2,2 0 -4,4 0 dimethylbipyridine = dmb (4) and 2,2 0 -dipyridylamine = dpa (5)]. The complexes were characterized by NMR ( 31 P, 1 H and HMBC 1 H-31 P), FTIR, elemental analysis and X-ray diffraction. The molecular structure of [Ru(CO)(dpa)(PPh 3 ) Cl 2 ] (1) was determined by X-ray crystallography. The crystal packing is stabilized by strong (CH 3 )O-HÁÁÁCl and N-HÁÁÁOH(CH 3 ) hydrogen bonds between symmetry-related molecules leading to the formation of dimers. Complexes 1-6 were evaluated as pre-catalysts for the reduction of acetophenone under transfer-hydrogenation conditions using isopropanol as hydrogen source, and conversions up to 86 % in 4 h were achieved.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.