Paper Title
Synthesis, Spectroscopy, Thermal Analysis and Antifungal Activity of Trans-[Cu(C7h3n2o6)2(H2o)2]N and its Ligand

The title compound trans-diaquabis (3,5-dinitrobenzoato)copper(II), trans-[Cu(C7H3N2O6)2(H2O)2]n or (2), has been synthesized from the reaction of copper(II) chloride dihydrate and a 3,5-dinitrobenzoic acid (C7H4N2O6 or (1)). These two compounds have been characterized by single crystal X-ray diffraction, elemental analysis, FT-IR, UV-Vis spectroscopy and thermal analysis. X-ray structure determination of the pale yellow compound (1) crystallizes in space group C2/c. The green compound (2) crystallizes in asymmetrical orthorhombic space group Pna2(1). Compound (1) is another form of 3,5-dinitrobenzoic acid which contains the 𝐑𝟐 𝟐(𝟖) carboxylic acid dimers and N-OO intermolecular interactions yielded the corrugated sheets in crystal motifs. The polymeric structure of (2) consists of not only a trans compound but also the Jahn–Teller distorted [CuO4O2] octahedral geometry. Ligands 3,5-dinitrobenzoato of trans-[Cu(C7H3N2O6)2(H2O)2] acting as bidentate bridging ligands to form the one-dimensional (1-D) polymer. Infrared spectra of these two compounds reveals the stretching and bending frequencies of important groups such as –OH, -COO-, NO2 and rings. The intense UV-Visible spectral bands correspond to π-π* of the aromatic ring in both compounds and d-d transition of compound (2). Thermal analysis of compounds (2) shows their weight losses. The compounds were tested for the in vitro antifungal activity. Keywords— In vitro antifungal activity, Jahn–Teller distorted octahedral geometry, One-dimensional polymeric copper compound