799252-62-3Relevant articles and documents
Synthesis of ruthenium(II) complexes containing tridentate triamine (′NNN′) and bidentate diamine ligands (NN′): As catalysts for transfer hydrogenation of ketones
Guennaz, Salih,Oezdemir, Namk,Dayan, Serkan,Dayan, Osman,Cetinkaya, Bekir
experimental part, p. 4165 - 4173 (2011/10/03)
A series of neutral and cationic Ru(II) complexes (1-10), bearing pyridine-based tridentate (′NNN′), pyridine-based bidentate (NN′), and mixed ′NNN′ + NN′ ligands, were synthesized by starting from [RuCl 2(DMSO)4] and [RuCl2(p-cymene)]2 precursors. Solid-state structures of mixed-ligand complexes 9 and 10 were determined by single-crystal X-ray diffraction. Both complexes are unusual in that NN′ ligands were spontaneously oxidized in air under base-free conditions to give imine-amine bidentate ligands upon replacement of p-cymene by meridional ′NNN′. The complexes 1-10 were screened for transfer hydrogenation (TH) of aryl ketones with 2-propanol. The highest catalytic activity was obtained with the complexes containing tridentate ′NNN′ and 7, which contain nonsulfonated 2-(aminomethyl)pyridine. However, for complexes 6a-c, containing p-cymene (a facial tridentate ligand), a slower reaction rate was observed.
