Synthesis, crystal structure and Thermogravimetry of ortho-phthalic acid bridged coordination polymer of Copper(II)

Abstract

Coordination polymer of Cu(II) bridged by o-phthalic acid alone is not known. The reaction of CuCl2.2H2O with (2-butoxycarbonyl)benzoic acid yielded three dimensional coordination polymer bridged by o-phthalic acid. X-ray crystal structure shows structure with monoclinic P21/c space group. o-Phthalic acid molecules act as bridge between two Cu(II), one carboxylate binds to one Cu(II) as bidentate while the other carboxylate binds to another Cu(II) as monodentate. The four planar co-ordination positions of Cu(II) are satisfied by two chelated carboxylates while fifth and sixth co-ordination positions are satisfied by monodentate carboxylates. EPR and TGA of the coordination polymer are also reported. The reaction of CuCl2.2H2O with (2-butoxycarbonyl)benzoic acid yielded three dimentional coordination polymer where o-phthalic acid acts as bridge between Cu(II) centres. The X-ray crystal structure shows monoclinic P21/c space group with one carboxylate of o-phthalic acid binds to one Cu(II) as bidentate while the other carboxylate binds to another Cu(II) as monodentate.