Thermochemical properties of diorganylchalcogenides and -dichalcogenides RMnR (M=S, Se, Te; n=1, 2)

Production and evaporation enthalpies for diorganylchalcogenides with the general formula RMnR, where M=S, Se, Te; n=1,2; R=alkyl, vinyl are determined by calorimetry method. A reliable method of tellurium organic compound burning is developed. Atomization enthalpies and binding energies are calculated for the substances studied. It is shown that C-M and NM-M binding energies decrease with the growth of the element (S, Se, Te) ordinal number as well as under transition to C-M bonds from the primary carbon atom (CH3) to the secondary one (CH2) and further to the ternary