Abstract
Oxazolone forms (1:1) complexes with Fe
2+, Co
2+, Ni
2+, Cu
2+ and Zn
2+ chlorides, as well as forms (1:1) complexes with Co
2+ and Cu
2+ acetates. All the complexes are found to be non-electrolytes in DMF; tetrahedral, square-planar and octahedral structures are assigned to them based on electronic and magnetic data. IR studies reveal that the complexes are formed by donating the lone-pair electron from O and N atoms to the metal ion. The thermal decomposition of the [ML·
mX·
nH
2O]
y
·H
2O chelates was studied by TG–DTA techniques. The mechanism of the decomposition has been established from TG–DTA data. The kinetic parameters, activation energy (
E
a) and pre-exponential factor (
A), were calculated from TG curves using Coats and Redfern method. Relative thermal stabilities of the chelates have been evaluated on the basis of these parameters.