Zinc(II) and copper(II) complexes with benzothiadiazole Schiff-base ligands
نویسندگان
چکیده
The ligand (2-[4-(2,1,3-benzothiadiazole)imino]methyl-phenol) HL1 containing the electron poor benzothiadiazole (BTD) unit, conveniently prepared by condensation of 4-amino-2,1,3-benzothiadiazole and salicylaldehyde, has been structurally characterized single crystal X-ray diffraction. Two energy minima have determined, DFT calculations, for its ortho-vanillin analogue HL2, corresponding either to conformer observed in solid state or chelating tridentate form. TD-DFT calculations performed on HL2 order assign their experimental UV–visible absorption bands. Reaction with copper (II) hexafluoroacetylacetonate (hfac), zinc acetate provided neutral complexes [Cu(L1)(hfac)] (1), [Zn(L1)2] (2), [Cu(L2)2] (3) [Zn(L2)2] (4) which were characterized, a focus coordination sphere metal centre intermolecular interactions. properties Zn(II) 2 4 experimentally theoretically investigated compared those ligands. Finally, cryomagnetic study 1 3 temperature range 2.0–295.0 K reveals Curie-Weiss law behaviour very weak antiferromagnetic interactions low region.
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ژورنال
عنوان ژورنال: Polyhedron
سال: 2022
ISSN: ['1873-3719', '0277-5387']
DOI: https://doi.org/10.1016/j.poly.2022.115994