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Synthesis, Characterization, Structural, Electrochemical and Magnetic Studies of Monomeric [NiII(1-MeIm)6]Cl2.H2O Complex

A. S. Ganeshraja, Department of Chemistry, Pondicherry University, Pondicherry 605 014, India K. Rajkumar, Department of Chemistry, Pondicherry University, Pondicherry 605 014, India S. Thirumurugan, Department of Chemistry, Pondicherry University, Pondicherry 605 014, India K. Anbalagan kanuniv@gmail.com
Department of Chemistry, Pondicherry University, Pondicherry 605 014, India

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Abstract

Monomeric hexakis(1-methylimidazole)nickel(II) chloride monohydrate, [NiII(1-MeIm)6]Cl2.H2O has been synthesized and the geometry was determined using single crystal X-ray diffraction analysis. Spectral characterizations were made using FTIR, UV-vis, Raman analysis. Structure of the title complex consists; Ni atom is coordinated with six 1-methylimidazole ligands and two chloride ions are present in the outer sphere. Single-crystal X-ray diffraction refinement confirmed that the molecule belongs to monoclinic crystal system (crystal data: space group P21/n, a = 8.0678(2) Å, b = 13.2216(5) Å, c = 15.0738(5) Å, α = β = 90º, γ = 97.816(3)º, volume = 1592.98(9) Å, z = 5) with octahedral geometry. Strong photoluminescence (PL) was observed at 311 nm. Electrochemical reduction was measured using cyclic voltammeter. The complex shows magnetic hysteresis (Hci = 88.242 Oe, Ms = 4.62 memu/g, Mr = 4.84.87 µemu/g) indicating the existence of ferromagnetism

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