Synthesis and characterization of complex of copper(II) with hydantoin

Abstract

This study aims to find out the way of synthesis, formulas, electronic spectra, magnetic properties, and infrared spectra formed from copper(II) with hydantoin. Copper(II)-hydantoin complex has been synthesized with a mole ratio of 1:2 metal to ligand in methanol. The empirical formula of the complex estimated from the analysis of copper content in the complex was Cu(hydantoin)3SO4(H2O)n (n = 3, 4 or 5). Electrical conductivity showed the ratio of the cation: anion charge in the complex was 1:1. Thermal analysis estimated the existence of four water molecules as both ligand and hydrate. The proposed formula of the complex was [Cu(hydantoin)3(H2O)]SO4·3H2O. The electronic spectra showed an absorption peak at 795 nm. Measurement of magnetic moment with Magnetic Susceptibility Balance (MSB) shows that the complex is paramagnetic with μeff of 1.81 B.M. This indicates that the complex has a square planar structure. IR spectra data showed a shift in the absorption of one of the N-H functional groups on the hydantoin which showed coordination on the central atom.