Synthesis, Crystal Structure and EPR Studies of Vanadyl Doped [Co(2-Nbh)2(ina)2(H2O)] Complex

Abstract

A novel aquabis(isonicotinamide-κN1)bis(2-nitrobenzoato-κ2O,O′;κO)cobalt(II), (hereafter [Co(2-nbH)<inf>2</inf>(ina)<inf>2</inf>(H<inf>2</inf>O)]; 2-nbH: 2-nitrobenzoic acid; ina: isonicotinamide), complex was synthesized and characterized by using various techniques. The crystal structure was determined by X-ray diffraction (XRD) method. The magnetic properties of VO2+ doped [Co(2-nbH)<inf>2</inf>(ina)<inf>2</inf>(H<inf>2</inf>O)] complex were obtained by electron paramagnetic resonance (EPR) technique. The angular variation of EPR spectra shows that two different VO2+ complexes are present in the lattice. The FT-IR spectra of this compound were discussed in relation to other compounds containing 2-nitrobenzoato or isonicotinamide ligands. Thermal stability and reactivity of this complex were also studied by thermal analysis methods (TG/DTG/DTA). © 2016 Elsevier B.V.