Synthesis and characterization of oxo zirconium (IV) complexes of polydentate ligands

The reactions have been carried between the metal ion salt ZrOCl2 and the ligands N,N’-ethylene-bis-(2-amino benzamide) [EBAB], N,N’-propylene-bis-(2-aminobenzamide) [PBAB], N,N’-(o-Phenylene)-bis-(2-aminobenzamid) [PhBAB], N,N’-ethylene-bis-(3-carboxypropanamide) [EBCP], N,N-propylene-bis-(3-carboxypropanamide) [PBCP], and 1-(2’-hydroxyphenyl)-3-phenyl-1,3-propanedione [HPPPD] to form the complexes. The complexes have been characterized by the physiochemical and spectral studies like elemental analysis, conductance, thermal, IR, UV, and NMR spectra. From the spectral data it is found Zr-O-Zr interaction and hexa coordination of ZrO(IV). Thermal studies confirm such interaction between two [LZrO] species through the oxygen atom is very weak.