Kinetic Study of Thermal Degradation of Di-, Chlorodi- and Triorganotin(IV) Complexes of 2-[(2,6-Dichlorodiphenyl)amino]benzene Acetate H. Masooda, S. Yaqubb, F. Ahmedc, S. Alib,* and S. Shahzadib aNPSL, 16, H-9, Islamabad, Pakistan bDepartment of Chemistry, Quaid-i-Azam University, Islamabad, 45320 Pakistan cNESCOM, P.O. Box  2216, Islamabad, Pakistan  (Received 24 November 2005, Accepted 12February 2006)       The organotin complexes of the general formulae R2SnL2, R2SnLCl and R3SnL where R = C4H9, C6H5, and C7H7 and L = 2-[(2,6-dichlorodiphenyl)amino]benzene acetate, were subjected to thermal decomposition by thermogravimetric analysis (TGA). The decomposition of these compounds occurs mostly in two steps. Kinetic parameters such as order of reaction (n), activation energy (Ea), enthalpy (DH‡) and entropy (DS‡) of activation were calculated by using the Coats and Horowitz methods. The calculated values are in good agreement with observed TG values that confirm the structural integrity of the complexes. Keywords:  Organotin(IV) complexes, TG, Thermal degradation kinetics