Copper(II) and nickel(II) complexes with N′-[(Z)-phenyl(pyridin-2-yl)methylidene]acetohydrazide: Synthesis, crystal structures, DFT calculations and antioxidant effects
作者:Ram N. Patel、Yogendra Singh、Yogendra Pratap Singh、Raymond J. Butcher、Arti Kamal、I.P. Tripathi
DOI:10.1016/j.poly.2016.05.036
日期:2016.10
Abstract Two mononuclear copper(II) and nickel(II) complexes viz., [Cu(HL)(L)]NO3·2H2O 1 and [Ni(L)(Neocup)]ClO4·MeOH2 (where HL/L− = N′-[(Z)-phenyl(pyridin-2-yl)methylidene]acetohydrazide) complexes were synthesized and characterized by routine physiochemical techniques. Both complexes were structurally characterized using single crystalX-ray diffraction studies and belonging to space group P21/n
Supramolecular assemblies of new pseudohalide end-to-end bridged copper(II) complex and molecular structural variety of penta and hexa-coordinted metal(II) complexes with hydrazido-based ligand
geometry. In complex 4 two symmetry related, adjacent copper(II) coordination moieties are joined end-to-end in an unprecedented manner forming a thiocynate bridged, yielding a dicopper entity. The presence of two “symmetric” thiocynate bridges with Cu-SCN and Cu-NCS distances of 2.832 A and 1.925 A, respectively, results in a Cu ⋯ Cu distance of 5.503 A. Binuclear complex, 4 exhibits a weak antiferromagnetic