Synthesis, characterization and thermodynamic studies of complexes of dimethyl, diethyl, and diphenyltin(IV) dichlorides with (2H)-1,4-benzothiazine-2,3-(4H)-dione dioxime

• Main Authors: Leyla Shabani, Abedien Zabardasti, Ali Kakanejadifard
• Format: Article
• Language: English
• Published: Chemical Society of Ethiopia 2012-12-01
• Series: Bulletin of the Chemical Society of Ethiopia
• Subjects: Diorganotin(IV) dichloride; <i>vic</i>-Dioxime; (2H)-1; 4-Benzothiazine-2; 3-(4H)-dionedioxime; Thermodynamic studies
• Online Access: http://www.ajol.info/index.php/bcse/article/view/72963
• ISSN: 1011-3924; 1726-801X

The diorganotin(IV) compounds, [Me₂SnCl₂(H₂L)], [Et₂SnCl₂ (H₂L)] and [Ph₂SnCl₂(H₂L)] (H₂L = (2H)-1,4-benzothiazine-2,3-(4H)-dione dioxime), were synthesized by treating the appropriate diorganotin(IV) dichloride with H₂L in anhydrous ethanol. These complexes were characterized by IR, MS, UV-Vis, and ¹H NMR. Thermodynamic studies of the reported complexes have been carried out and their stability were found in the order: [Me₂SnCl₂(H₂L)] > [Et₂SnCl₂(H₂L)] > [Ph₂SnCl₂(H₂L)]. Theoretical calculations at the HF/3-21G* level showed that structures with alkyl groups at axial positions are more stable than their counterparts having alkyl groups at equatorial.DOI: http://dx.doi.org/10.4314/bcse.v26i1.9