Novel Mixed Ligand Complexes of Alkaline Earth Metals with Coumarilic Acid and Nicotinamide

Coordination compounds with mixed ligands were synthesized 2A group (Mg2+, Ca2+, Ba2+, Sr2+) alkaline earth metal cations of coumarilic acid and nicotinamide ligands. Afterward, the structural properties these new molecules investigated by melting point, elemental analysis, infrared spectroscopy, thermal analysis (TGA / DTA) curves, powder X-ray diffraction (P-XRD) spectroscopy. It has been suggested that complex structure Mg2+ center is different from other three structures. In this structure, it was determined four aqua two located in coordination sphere, number six, as expected. With monoanionic acids outside charge equivalence achieved. The molecules, Sr2+ have iso-structural properties, both structures contain a dinuclear center, are bridging position between centers. Besides, coumarilate involved thought to coordinate primary cation through carbonyl acidic oxygens while coordinating secondary furan oxygen, providing third bridge connection Metal nine numbers complete sphere terminal one ligands, each included structure. molecule Ca2+ cation, which differs little structures, difference according can be interpreted oxygen due octet cation. From only contained hydrate. As result decomposition, relevant oxide residues remained all situation defined XRD.