Synthesis, characterization and structures of binuclear copper(II) and polynuclear cobalt(II), nickel(II) and cadmium(II) complexes involving N-4-donor pyrazolyl based ligand and dicyanamide as bridging ligand

摘要

Binuclear copper(II) complex [Cu(bdpab)(mu-(1,5)dca)](2)(ClO4)(2) and polynuclear complexes [M(bdpab)(mu-(1,5)dca)](n)(ClO4)(n) [M = Ni(II), Co(II) and Cd(II) and dca = dicyanamide anion, {N(CN)(2)(-)}] were synthesized using pyrazolyl containing tetradentate N-4- coordinate ligand bdpab and bridging ligand dca and characterized by spectral data and single crystal X-ray diffraction studies. Structural characterization by single crystal X-ray diffraction studies show copper complex is binuclear and two copper centres are bridged by two mu-(1,5)dca ligands whereas Co(II) and Cd(II) complexes are polynuclear and two metal centres are bridged by one mu-(1,5)dca ligand in zig-zag pattern and all metal centres have octahedral geometry. (C) 2020 Elsevier B.V. All rights reserved.