Manganese(III) Complexes with Decolourization Ability| Chapter 3 | Progress in Chemical Science Research Vol. 1

From Mn(gly)2Cl, Mn(gly)2Br, Mn(gly)2N3, and Mn(gly)2NCS, some new mixed ligand complexes of Mn(III) with glycine ligand have been synthesised, namely [Mn(gly)2Cl(en)], [Mn(gly)2Br(en)], [Mn(gly)2N3(en) UV/visible, FT-IR, and mass spectrometry were used to characterise these complexes. All of these unique compounds have distorted octahedral geometry, according to the spectroscopic data. The maximum values for these complexes (5T2g 5Eg transitions) are 482 nm [Mn(gly)2N3(en)], 488 nm [Mn(gly)2NCS(en)], 486 nm [Mn(gly)2Br(en)], and 484 nm [Mn(gly)2Cl(en)]. The ligand field parameters 10 Dq, B, and have also been computed, and they all point to a covalent metal ligand connection. The FT-IR spectra of these complexes reveal stretching frequencies for both the free and coordinated NH2 groups in all of them, showing that the ethylenediamine ligand is not bridging. The mass spectrometry data indicate molecular ion peaks for [Mn(gly)2Cl(en)], [Mn(gly)2Br(en)], [Mn(gly)2N3(en)] and [Mn(gly)2NCS(en)] at m/z 300, 345, 307, and 323, respectively. The coordination of ethylenediamine to Mn(III) improves its decolorization efficacy of methyl red dye. The primary goal of this research is to investigate the catalytic characteristics of these compounds.

Author(s) Details:

Deepika Jaiswal,
Department of Chemistry, D.D.U. Gorakhpur University, Gorakhpur, U.P., India.

Sudha Yadava,
Department of Chemistry, D.D.U. Gorakhpur University, Gorakhpur, U.P., India.

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