Previous ArticleNext ArticleTable of Contents Oxo Transfer from Nitrogen Dioxide to Nitrito Group in a Copper(II) Complex
Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
Inorg. Chem., 2015, 54 (10), pp 4799–4805
DOI: 10.1021/acs.inorgchem.5b00242
Publication Date (Web): April 30, 2015
Copyright © 2015 American Chemical Society
*E-mail: biplab@iitg.ernet.in.
Reaction of Cu(II) complex [CuII(LH)(O2CCH3)2] (1) [LH = 4,6-ditert-butyl-2-((2-picolyl(isopropyl)amino)methyl)phenol] with equivalent amount of NO2 leads to the reduction of Cu(II) to Cu(I) with concomitant nitration at the phenol ring of the ligand. This resulted in the in situ formation of intermediate Cu(I) complex of the nitrated ligand (L′H). Additional equivalent of NO2 coordinates to the Cu(I) complex to form corresponding O-nitrito Cu(II) complex [CuII(L′(η1-ONO)] (2). Subsequent addition of NO2 led to the corresponding O-nitrato complex, [CuII(L′)(η1-ONO2)] (3) with concomitant formation of NO. Complexes 2 and 3 were isolated and structurally characterized. The formation of NO in the reaction was established by spin-trapping experiment. Isotopic labeling experiment revealed that the oxo transfer takes place from NO2 to the coordinated η1-ONO group.
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