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RESEARCH PRODUCT

Double azido-bridged and mixed-bridged binuclear copper(II) and nickel(II) compounds with N,N,O-donor Schiff bases: Synthesis, structure, magnetic and DFT study

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Abstract Two dinuclear complexes μ1,1-azido bridged [Cu(L1)(N3)]2 (1) and μ-phenoxo, μ1,1-azido bridged [Ni2(L2)2(μ1,1-N3)(N3) H2O] (2) bearing HL1 and HL2 as a blocking co-ligands produced by the 1:1 condensation of N-benzyl ethylenediamine with ortho-hydroxy acetophenone and N-methyl propanediamine with 3-methoxy salicylaldehyde respectively, have been synthesized and successfully characterized by elemental analyses, IR and electronic spectroscopy, single-crystal X-ray diffraction, variable temperature magnetic study and DFT studies. X-ray crystal structures of 1 reveal that the Cu(II) ion displays a five-coordinate square pyramidal coordination with a centro-symmetric μ1,1-azido bridging and forming a dimeric structure. The complex 2 compose of octahedrally coordinated dimeric nickel(II) complex with μ-phenoxo, μ1,1-azido bridging. Variable-temperature magnetic study (between 4.5 and 300 K) indicates a very weak and a moderate ferromagnetic intramolecular interaction are mediating through the metal centers for both of the complexes. The magnetic results have also been supported by the theoretical interpretations for both complexes.