Synthesis,Spectroscopic and Thermodynamic Study of New Reagent 2-[(6-Methyl-2-benzothiazolyl)azo]-4-N-methyl-1-hydroxy aniline (BTAHA) And its complexes with CuII,NiII Ions.

W. Radhi, Sami

	Synthesis,Spectroscopic and Thermodynamic Study of New Reagent 2-[(6-Methyl-2-benzothiazolyl)azo]-4-N-methyl-1-hydroxy aniline (BTAHA) And its complexes with CuII,NiII Ions.
journal of al-qadisiyah for pure science(quarterly)
Article 1, Volume 9, Issue 1, 2009, Pages 171-181 PDF (0 K)
Author
Sami W. Radhi
Abstract
The ligand 2-[(6-Methyl-2-benzothiazolyl)azo]-4-N-methyl-1-hydroxy aniline (BTAHA) was prepared after diazotization of amine thiazole derivative [by means of thiocynogen] with compound 4-N-methyl-1-hydroxy aniline . Ionization constant of ligand were determined by using potentiometeric titration. The complexes of ligand with divalent cations (Ni and Cu ) and their M:L ratio were determined using mole ratio method. Uv-Vis spectroscopy was used to calculate stability constants for these complexes at four different temperatures and estimate the thermodynamic functions . The solid complexes was studies using spectroscopic methods (eg:Uv.-Vis.,FTIR technique) ,Their solutions in absolute ethanol show red shift compared with the ligand solution,while FTIR spectra show many changes compared with ligand spectrum,and that was attributed to the association between ligand and metal ions. Flame atomic absorption spectroscopy was used to determined the percentage of metal ions in their complexes solutions ,the Molar Conductivity of complexes solutions and the Magnetic susceptibility for solid complexes were used to assume the structural formula of complexes . According to above studies it was found that the ligand was act as tridentate ligand after deprotonated the hydroxyl group on the benzene ring and the nitrogen atom in the thiazole ring and the nitrogen atom of azo group neighboring to the benzene ring,and then the formation of octahydral complexes may take place .

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