الفهرس 
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Abstract
The present thesis entitled ”studies on some complexes
tainingazogroup”comprises three chapters. lThefirst one is concerned with the literature survey on the
istry of azo compounds. Some structural chemistry of some
plexesaregiven.
The second chapter is related to the experimental part.
lheslsof (o-carboxy phenylazo) moiety of barbituric acid,
arbituric acid, thiouracil, citrazinic acid and disodium
motropatebeside their transition metal (Co, Ni, and Cu)
plexesare given. The elemental analysis of the organic
pounds and their complexes are reported. Different
dardizedinstruments (NMR, UV-VIS, IR,ESR, pfl and DSC) are
. Thepreparation of the solutions (Ligands and buffers) are
ained.
The results and their discussions are given in the third
ter. The existance of azo and hydrazo tautomers and the
gthof the intramolecular hydrogen bond are discussed. The
MR measurementsproved that all of the chelating agents are
ominating mainly in the keto form except disodium
motropatepresents in enol form. The effect of prl on the
tronlc absorption spectra of the ligands assigned the main
.tronictransitions (n~1t* and 1t~1t*) with the elucidation of the
omenaof tautomerism. The mode of ionization explained from
pl\ valuesviews.All the compounds gave two pK’s except that
vedfromthe thiouracil moiety.