Inorganic Chemistry Communications p. 26 - 31 (2017)
Update date:2022-08-11
Topics:
Ramesh, Madhan
Kumar, Madhu Deepan
Jaccob, Madhavan
Kaleeswaran, Dhananjayan
Venkatachalam, Galmari
New family of cyclometalated ruthenium(III) Schiff base complexes of the general composition [Ru(LON)(LCNO)(EPh3)] (L = Schiff base ligands of CNO- and ON-donors; E = P, As) have been synthesized and characterized by elemental analysis, FT–IR, UV–Vis and EPR spectral methods. The molecular structure of one of the complexes [Ru(LON)(LCNO)(PPh3)] (5) was determined by X-ray crystallography. The Schiff base ligands readily undergo cyclometalation with the ruthenium metal precursor by C–H activation at the peri-position. These Schiff base ligands coordinated to metal center as di-anionic tridentate CNO-donor and bi-dentate ON-donor in these cycloruthenium complexes. TD–DFT calculations were also carried out for the complex (5). The catalytic activity of the complex [Ru(LON)(LCNO)(PPh3)] (5) was performed and found to be an efficient catalyst for the transfer hydrogenation of ketones with excellent conversion in the presence of i-PrOH/KOH at 80 °C in 2 h.
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