Synthesis and Structure of the Copper(II) Complex with ortho-Phthalic Acid and 1-Methylimidazole [Cu(HPht)2(1-CH3Im)2]

A new Cu(II) complex [Cu(HPht)2(1-CH3Im)2] (I), where HPht is the monoanion of o-phthalic acid and 1-CH3Im is 1-methylimidazole, is synthesized and characterized by IR spectroscopy, thermogravimetry, and X-ray diffraction analysis. Compound I contains molecular complexes in which the o-phthalic acid residue is monodeprotonated and linked to a metal through the carboxyl group in a 1,3-chelate mode. The cis-octahedral coordination of copper is formed by two HPht residues and two 1-CH3Im molecules. The distances are Cu-N1.945(6) Å, Cu-O2.018(5) Å and 2.374(6) Å. Polymeric chains are formed in complex I due to intermolecular \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document} $$\operatorname{O} - \operatorname{H} \cdots \operatorname{O}$$ \end{document} hydrogen bonds. The chains are unified into layers by the \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document} $$\operatorname{C} - \operatorname{H} \cdots \pi$$ \end{document} interactions between the 1-CH3Im molecules of the adjacent complexes.