Self assembly of a novel mixed-ligand hydrogen bonding three dimensional supramolecular network [Co(Phmal)(Him)4]

A novel supramolecular mixed ligand complex of formula [Co(Phmal)(Him)4] (Phmal = phenylmalonate, Him = imidazole) has been synthesized and characterized by FT-IR spectroscopy, thermogravimetric analysis (TG), UV-Vis spectra. X-ray crystallographic studies of the complex reveal that the cobalt atom exhibits a distorted octahedral geometry being coordinated by four nitrogen atoms of Him ligands, two oxygen atoms from the phenylmalonate ligand. The intramolecular C-H⋯π interaction exists in the title complex. The three dimensional supramolecular network is constructed from the strong intermolecular N-H⋯O hydrogen bonds.