Abstract:
Thermal dissociation of some nitrogen ligagted complexes of 2-quanidinobenzimidazole (GMB). 1, 2-dimorpholinoethane (DME) and 1, 3-dimorpholinpropane (DMP) with Ni (II), Cu (II) Zn Cd (10, Hg (II) and Mn (II) have been studied by thermogravimetry and few compounds by differential thermal analysis. The thermal decomposition of GMB, DME and DMP complexes with transition metals was generally observed, occur in two stages. The dissociation sequence observed of GMB complexes was such that the ligand was lost in the second stage of dissociation. However DME and DMP chelates were found to follow entirely different decomposition mechanism. In DMP chelates the ligand was lost in the first stage of dissociation followed by the elimination of halogens. DME complexes, unlike DMP chelates, lose part of the ligand, one morpholine moiety, in the first stage and morpholinoethane moeity in the second stage of dissociation. The nontransition metal complex of all the three ligands follow the same sequence of decomposition and analysis of Ni(11) complexes are also reported. The reaction found in DTA curves correspond well to those found in the TGA curves.
Page(s):
1-9
DOI:
DOI not available
Published:
Journal: Journal of Chemical Society of Pakistan, Volume: 6, Issue: 1, Year: 1984