Synthesis, Crystal Structures, Characterization and Catalytic Property of Copper(II) Complexes Derived from Hydrazone Ligands

Abstract

A new bromido-coordinated mononuclear copper(II) complex [Cu(HL¹)Br₂] (1), and a new mononuclear copper(II) complex [CuL²(HL²)]ClO₄·0.5H₂O (2), with the hydrazone ligands 4-tert-butyl-N’-(1-(pyridin-2-yl)ethylidene)benzohydrazide (HL¹) and 4-bromo-N’-(pyridin-2-ylmethylene)benzohydrazide (HL²), have been synthesized and structurally characterized by physico-chemical methods and single crystal X-ray determination. X-ray analysis indicates that the Cu atom in complex 1 is in distorted square pyramidal coordination, and that in complex 2 is in octahedral coordination. The catalytic property for epoxidation of styrene by the complexes was evaluated.