期刊
JOURNAL OF MOLECULAR STRUCTURE
卷 1084, 期 -, 页码 352-367出版社
ELSEVIER
DOI: 10.1016/j.molstruc.2014.12.041
关键词
Azo-dye Schiffs base complexes; Electronic; IR; Molecular modeling; Biological activity
资金
- Deanship of Scientific Research at King Saud University - Saudi Arabia [RGP-VPP-062]
A new series of complexes of 4-(4-hydroxy)-3-(2-pyrazine-2-carbonyl)hydrazonomethylphenyl-diazenyl-benzenesulfonamide (HL) with Mn(II), Co(II), Ni(II), Zn(II) and Cd(II) have been prepared and characterized by different physical techniques. The IR spectra of the prepared complexes were suggested that the ligand behaves as a tri-dentate ligand through the carbonyl oxygen, azomethine nitrogen and phenolic oxygen atoms (ONO). Electronic spectra and magnetic susceptibility measurements reveal octahedral geometry for all complexes. The elemental analyses and mass spectral data have justified the ML2 composition of complexes. The EPR spectra of Mn(II), Co(II) and Ni(II) complexes support the mononuclear structure. The crystal field splitting, Racah repulsion and nephelauxetic parameters and determined from the electronic spectra of the complexes. Thermal properties and decomposition kinetics of all complexes are investigated. The geometry of the metal complexes has been optimized with the help of molecular modeling. The biological activity of these compounds against various fungi has been investigated. (C) 2014 Elsevier B.V. All rights reserved.
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