Synthesis, crystal structure, theoretical studies and biological properties of three novel trigonal prismatic Co(II), Ni(II) and Cu(II) macroacyclic Schiff base complexes incorporating piperazine moiety

Trigonal-prismatic structures among different transition metal complexes according to the Cambridge Structural Database (CSD) are rare. The number of trigonal prisms throughout the transition-metal series is less than 1% of all six-coordinate metal centers and only 0.4% of cobalt complexes. Herein we report a novel macroacyclic Schiff base complexes incorporating piperazine moiety with Trigonal-Prismatic coordination were prepared via the metal...