S M El-Megharbel
Articles written in Bulletin of Materials Science
Volume 32 Issue 2 April 2009 pp 205-214 Thermal Studies
The complexations of sulfasalazine (H3Suz) with some of transition metals have been investigated. Three types of complexes, [Mn(HSuz)-2(H2O)4].2H2O, [M(HSuz)-2(H2O)2].𝑥H2O (M = Hg(II), ZrO(II) and VO(II), 𝑥 = 4, 8 and 6, respectively) and [M(HSuz)-2(Cl)(H2O)3].𝑥H2O (M = Cr(III) and Y(III), 𝑥 = 5 and 6, respectively) were obtained and characterized by physicochemical and spectroscopic methods. The IR spectra of the complexes suggest that the sulfasalazine behaves as a monoanionic bidentate ligand. The thermal decomposition of the complexes as well as thermodynamic parameters (𝛥 𝐸*}, 𝛥 𝐻*, 𝛥 𝑆* and 𝛥 𝐺*) were estimated using Coats–Redfern and Horowitz–Metzger equations.
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