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Synthesis, Characterisation, Crystal Structure, and Antimicrobial and Larvicidal Studies of [Cu(2,2'-bipy)2SO4]·3CH4N2O·2H2O
A pentacoordinated mononuclear copper(II) complex, namely, bis(2,2'-bipyridine)sulphatecopper(II) urea trisolvate dihydrate, has been synthesised and characterised by molar conductance and UV-Vis and FTIR spectra. The structure of the complex was unambiguously confirmed by single crystal XRD. The complex crystallizes in monoclinic system, space group C2/c, with the values a = 20.155(4), b = 20.858(4), and c = 14.425(3) Å; α = 90.00°, β = 96.51°, and γ = 90.00°; V = 6025(2) Å3 and Z = 8. The Cu(II) ion is coordinated to four nitrogen atoms of two bidentate 2,2'-bipyridine ligands (bipy) and by one oxygen atom of the sulphate group and displays distorted trigonal bipyramidal geometry. The crystal packing is stabilized by inter- and intramolecular hydrogen bonding. The Cu(II) complex was screened for antimicrobial activity against Staphylococcus aureus, Escherichia coli, Klebsiella pneumonia, Aspergillus niger, Aspergillus flavus, and Candida albicans. Larvicidal activity of the synthesized copper(II) complex was carried out against larvae of Culex quinquefasciatus and Anopheles subpictus.
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