Synthesis and spectroscopic characterizations of manganese(II), iron(III), copper(II) and zinc(II) hydrazine complexes as catalytic activity agents

Abstract

ABSTRACT. This article deals with the preparation and coordination of NH₂—NH₂ hydrazine molecule compounds. The hydrazine sulfate complexes of Mn(II), Fe(III), Cu(II), and Zn(II) were prepared. These complexes were characterized by elemental, infrared, conduction, electron absorption spectroscopy, magnetic susceptibility, thermogravimetric analyses, X-ray powder diffraction (XRD) patterns and atomic force microscopy (AFM) studies. The magnetic measurements were confirmed that the Mn(II), Fe(III), Cu(II), and Zn(II) hydrazine complexes have an octahedral geometric structure. Thermogravimetric and its differential thermogravimetric analysis referred that all complexes passed through two-to-three thermal degradation steps with solid metal sulfate as a residual product. The infrared spectra inferred that the NH₂—NH₂ ligand forms complexes through nitrogen atoms of the—NH₂ moiety, while the elemental analysis indicates [M(NH₂—NH₂)₃]SO₄ (where M = Mn(II), Cu(II), and Zn(II)) while the iron(III) complexes have the [Fe₂(NH₂—NH₂)₄(SO₄)₂]SO₄ formula of coordination compounds, NH₂—NH₂ acts as a double bond. Both XRD and AFM analysis deduced that the synthesized hydrazine metal complexes were found to be in nano scale range 10—30 nm.

KEY WORDS: Hydrazine, FTIR, AFM, XRD, Transition metals

Bull. Chem. Soc. Ethiop. 2022, 36(1), 33-44.                                                                   

DOI:   https://dx.doi.org/10.4314/bcse.v36i1.4