Abstract
The thermal decomposition using TG, DTG and DTA, of seven complexes of the types Bu2SnL(I) and Bu2SnL(II) (where H2L(I)=Schiff base derived from acetylacetone and glycine [H2L-1(I)] or L-leucine [H2L-4(I)] or methionine [H2L-5(I)] or phenylglycine [H2L-6(I)]; H2L(II)=Schiff base derived from o-hydroxynaphthaldehyde and β-alanine [H2L-2(II)] or DL-valine [H2L-3(II)] or L-leucine [H2L-4(II)] is shown to fall into one of two categories, viz, (1) Bu2SnL(I) complexes that decompose without melting to give SnO as the final tin containing product, (2) Bu2SnL(II) complexes that melt and then decompose to give SnO. Mathematical analysis of TG data using Coats-Redfern equation, Horowitz-Metzger equation, and Fuoss method shows that the first order kinetics is applicable in all the complexes except Bu2SnL-2(II). Kinetic parameters such as the energy and entropy of activation and pre-exponential factor are reported.
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