Details

Autor(en) / Beteiligte

• Lee, Chun-Chin
• Chu, Wan-Yi
• Liu, Yi-Hong
• Peng, Shie-Ming
• Liu, Shiuh-Tzung

Titel

Coordination and Catalytic Activity of Ruthenium Complexes Containing Tridentate P,N,O Ligands

Ist Teil von

• European Journal of Inorganic Chemistry, 2011-11, Vol.2011 (31), p.4801-4806

Ort / Verlag

Weinheim: WILEY-VCH Verlag

Erscheinungsjahr

2011

Quelle

Wiley Online Library

Beschreibungen/Notizen

• The coordination chemistry of RuII ions with [2‐(diphenylphosphanyl)‐N‐(o‐hydroxybenzylidene)]aniline (PNO‐H) and the methylated analogue PNO‐Me have been studied. Thus, [(PNO)RuCl(dmso)2] (1), [(PNO)2Ru] (2), [(PNO)RuCl(PPh3)] (3) and [(PNO)RuCl(CO)2] (4) were synthesized by reactions of various RuII precursors with PNO‐H. Treatment of PNO‐Me with [RuCl2(dmso)4] resulted in in the formation of [P,N‐(PNO‐Me)Ru(dmso)2Cl2] (5). However, complexation of PNO‐Me with [RuCl2(CO)3(THF)] (THF = tetrahydrofuran) provided a mixture of [P,N‐(PNO‐Me)Ru(CO)2Cl2] (6) and 4 because O‐demethylation took place during the reaction. All of the RuII complexes have been characterized by elemental analysis and spectroscopic techniques, as well as X‐ray crystal structural analysis for 2, 4 and 6. The ruthenium complexes investigated in this work, except 2, are good precatalysts for the reductive amination of amine with alcohols, and 4 appears to be the best. Moreover, 4 can catalyze the direct amination of nitrobenzene with benzyl alcohol to the corresponding secondary amine. Ruthenium complexes containing P,N,O ligands have been synthesized and characterized. These RuII species appear to be good catalysts for the reductive amination of amines or nitrobenzene with alcohols.