Synthesis, Crystal Structure of Tetra-Nuclear Macrocyclic Zn(II) Complex and Its Application as Catalyst for Oxidation of Benzyl Alcohol

A new six coordinated tetra-nuclear macrocyclic Zn(II) complex, ZnL4(Phen)2 (1) (HL= 3-bromo-2-hydroxybenzaldehyde-pyridine-2-carbohydrazone, Phen = 1,10-phenanthroline) has been synthesized by the self-assembly of Zn(CH3COO)2•2H2O, NaOH and 1,10-phenanthroline in water/ethanol (v:v 1:3) solution. Complex 1 was characterized elemental analysis, infra red (IR), single-crystal X-ray diffraction (XRD) analysis. The results show that Zn1 Zn1b ions are six-coordinated with a distorted octahedral geometric configuration four O atoms two different L ligands N ligands, Zn1a Zn1c also ligands. forms 3D network structure - interaction. selective oxidation reactions benzyl alcohols catalyzed complex investigated. highest alcohol conversion benzaldehyde selectivity were obtained at 100 °C for 4 h under 5 bar O2. Copyright © 2021 Authors, Published BCREC Group. This is an open access article CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).