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Synthesis,characterization and crystal structure analysis of a novel oxo-centered mixed-metal complex containing unsaturated bridging carboxylates
Authors:Mohammad Yazdanbakhsh  Nahid Lotfian  Haman Tavakkoli  Roland Boese
Institution:(1) Department of Chemistry, Quaid-i-Azam University, Islamabad, 45320, Pakistan;(2) Department of Chemistry, GC University, Faisalabad, Pakistan;(3) Dipartimento di Chimica Generale ed Inorganica, Chimica Analitica, Chimica Fisica, Viale G. P. Usberti 17/A, Parma, 43100, Italy;
Abstract:A novel oxo-centered trinuclear mixed-metal carboxylate complex with unsaturated bridging ligands Fe2Cr(μ3-O)(C3H3O2)6(H2O)3]·NO3·4H2O has been synthesized and characterized by means of Elemental analyses, Infrared spectroscopy and Crystal structure analysis. The compound crystallizes isotypically in the monoclinic space group type P21/c. In the compound, each M(III) cation is coordinated by six O atoms from four unsaturated carboxylate groups as bridging ligands, one water molecule as the terminal ligand, and a μ3-oxygen atom in the center of an equilateral triangle. The infrared spectra show resolved bands arising from νasym(COO) and νsym(COO) vibration of bridging carboxylate ligands along with those of νasym(M2M′O) vibration in the complex. The difference between symmetrical and asymmetrical (COO) ligands indicate that the acrylate bridge is present in the structure of complex. MediaObjects/11532_2011_36_Fig1_HTML.jpg
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