Abstract
AbstractA series of phenanthroline based NHC and pyridine containing NNC and NNN pincer Ru(II) complexes were synthesized and fully characterized by various spectroscopic techniques. Comparative studies revealed that Ru(II)‐NHC complexes were much more active than the Ru(II)‐NNN complexes in both transfer hydrogenation (TH) of ketones and nitroarenes. Wingtip groups and counter anions modulated the impact of NHC complexes in both the reactions. The complexes with PF6‐ counter anion were found to be more active in TH of ketones while complexes with Cl‐ counter anion were superior towards the nitroarenes reduction. To the best of our knowledge this is the first example of counter anion controlled reactivity alteration between TH of ketones and nitroarenes.
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