Synthesis and characterization of cobalt(II), nickel(II), copper(II) and zinc(II) complexes of 2-nitrobenzoic acid with methyl carbazate as ancillary ligand. Crystal structure of the copper(II) complex |
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| Authors: | Ayyasami Kathiresan Krishnan Srinivasan Selvaraj Brinda Munirathinam Nethaji Subbaiah Govindarajan |
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| Institution: | (1) Department of Chemistry, School of Chemical Sciences, Bharathiar University, Coimbatore, 641 046, India;(2) Department of Chemistry, Thiruvalluvar University, Serkkadu, Vellore, 632 115, India;(3) Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore, 560 012, India; |
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| Abstract: | Divalent metal complexes of general formula M(2-nb)2(mc)2].2(2-nbH), where M = Co(II), Ni(II), Cu(II) or Zn(II), 2-nbH = 2-nitrobenzoic acid and mc = methyl carbazate (NH2NHCOOCH3), have been prepared and characterized by physicochemical and spectroscopic methods. Single-crystal X-ray study of the Cu(II)
complex revealed that the molecule is centrosymmetric, with two N,O-chelating mc ligands in equatorial positions and a pair
of monodentate 2-nb anions in the axial positions. The lattice 2-nbH molecules help to establish the packing of monomers through
hydrogen-bonding interactions. Thermal stability and reactivity of the complexes were studied by TG–DTA. Emission studies
show that these complexes are fluorescent. |
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