Structural effects of potentially hexadentate Schiff base ligands involving pyrrolic, etheric or thioetheric donors towards zinc(II) cation: Synthesis, characterization and crystal structures

Abstract

The three new zinc (II) complexes (ZnLm, m = 1-3) of potentially hexadentate Schiff base ligands containing N4O2 and N4S2 donors with pyrrole terminal binding groups H 2L1:[(1Z)-1H-pyrrole-2-ylmethylene]{2-[2-(2-{[(1Z)-1H- pyrrole-2-ylmethylene]amino}phenoxy)ethoxy]phenyl}amine, H2L 2:[(1Z)-1H-pyrrole-2-ylmethylene]{2-[4-(2-{[(1Z)-1H-pyrrole-2- ylmethylene]amino}phenoxy)butoxy]phenyl}amine and H2L 3:[1H-pyrrole-2-ylmethylene][2-({2-[(2-{[1H-pyrrole-2-ylmethylene] amino}phenyl)thio]ethyl}thio)phenyl]amine, were synthesized and physicochemically characterized. Cyclic voltammetry data indicate that the complexes are electrochemically inactive. The molecular structures of the complexes were dete..