om5b00727_si_003.cif (33.7 kB)
Substituent Effect on the Catalytic Activity of Ruthenium(II) Complexes Bearing a Pyridyl-Supported Pyrazolyl-Imidazolyl Ligand for Transfer Hydrogenation of Ketones
dataset
posted on 2015-11-09, 00:00 authored by Huining Chai, Tingting Liu, Qingfu Wang, Zhengkun YuAir- and moisture-stable ruthenium(II)
complexes bearing a multisubstituted
pyrazolyl-imidazolyl-pyridine ligand were synthesized and structurally
characterized by NMR and X-ray single-crystal crystallographic analyses.
The substituents on the imidazolyl moiety of the NNN ligand exhibited
a remarkable impact on the catalytic activity of the corresponding
Ru(II) complexes for transfer hydrogenation of ketones in refluxing
2-propanol, following the order NHTs > Me > H > NO2, to
tune the catalytic activity. The highest final TOF value of 345 600
h–1 was reached by means of 0.05 mol % of the Ru(II)-NHTs-substituted
NNN complex as the catalyst. The corresponding structurally confirmed
RuH complexes are proposed as the catalytically active species.