Abstract
Transformation of nitrite to nitric oxide at transition metal sites is of significant interest due to its biogeochemical and physiological relevance. This report illustrates the synthesis and structural characterization of a novel mononuclear nitritocopper(II) complex [L1]Cu(κ2-O2N) supported by a tridentate ligand bearing pyrazole and phenolate moieties. Moreover, oxygen-atom-transfer (OAT) reactivity of nitrite anion at a copper(II) site in [L1]Cu(κ2-O2N) is illustrated with a detailed kinetic analysis revealing the mechanism for the reduction of nitrite to nitric oxide. This result implies the possibility of copper(II) mediated oxygen-atom-transfer (OAT) reactivity of nitrite in the presence of oxophilic functionalities in the biological milieu.
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