OP-II-3

PP-I-55KINETIC CHARACTERISTICS OF THERMAL DECOMPOSITIONOF DITHIOL COMPLEXES OF Fe(II)Sugurbekova G. 1 , Mazhibaev A. 1 , Shomanova Zh. 1 , Sugurbekov Y. 21 Taraz State University named after M. Kh. Dulaty, Kazakhstangulnar-sugur@yandex.ru2 Razakh-British Technical University, KazakhstanThe results of thermal decomposition of 2,3-dimerkaptopropansulfonate(unithiol-L) complex of iron are represented.The thermal analysis of the complex have been carried out by DTA and DTGmethods on the derivatograph Q-1000 (Paulik-Paulik-Erdei) via nonisothermicheating till the full destruction in the oxidizing atmosphere under atmosphericpressure and humidity. Al 2 O 3 calcinated at 1000°C has been used as a comparativestandard. The chain resistance of DTA was 1/10 and DTG as well, the heatingvelocity was 10° C per min.The identification of intermediate and final products of thermal decomposition[FeL 2 H 2 O] H 2 O have been carried out by chemical, X-ray phase andIR-spectroscopic methods.Endotermic effects at nearby 100°C and 240°С on the DTA thermal destructioncurve have been related to the dehydration on process of Na 2 [FeL 2 H 2 O] H 2 O (fig.1).t 0 ,C12001000TG440 0 СDTGΔm, mg0-208006004002000-40100 0 СDTA240 0 С-60-80T600 0 С-100-1200 50 100 150 200 250time,minFig. 1 – Derivatogramme unithiol complex of ironExotermic effects at 400°C and 440°С, blocking each other, are forming bigmaximum having a break in the area of 400°С and correspond to the thermal destructionof coordinated molecules of ligand followed by sulphide and sulphate of iron. It must bemarked that exoeffect at 400°C is faint. May be the process corresponding to these316