Synthesis, spectral, and thermal studies of organotin(IV) complexes with 4-bromo-2-{[(2-hydroxyphenyl)imino]methyl}phenol

Article type: Research Article

Authors: Sedaghat, Tahereh | Shafahi, Fatemeh

Affiliations: Department of Chemistry, College of Science, Shahid Chamran University, Ahvaz, Iran | Science and Research Branch, Islamic Azad University, Ahvaz, Iran

Note: [] Corresponding author. Email: [email protected]

Abstract: The organotin(IV) chlorides R2SnCl2 (R = Ph and Me) react with a Schiff base (H2L), obtained from the condensation of 5-bromo-2-hydroxybenzaldehyde and ortho-aminophenol. Spectral properties of new complexes were investigated by infrared (IR), 1H NMR, and 119Sn NMR spectroscopy and show that in the two complexes H2L acts as a tridentate dianionic ligand and co-ordinates to the metal via two phenolic oxygens and one imine nitrogen. The 119Sn NMR data are consistent with the presence of five-coordinate tin(IV) in solution. Thermal decomposition of the complexes has been studied by thermogravimetry and the activation energy has been determined by the Horowitz–Metzger method.

Keywords: organotin, thermal analysis, Schiff base, 119Sn NMR

DOI: 10.1080/10241220902962895

Journal: Main Group Chemistry, vol. 8, no. 1, pp. 1-9, 2009