Arturo Ximello - The standard molar enthalpies of combustion and formation of 2-methylbenzothiazole, 2-methylbenzoxazole, and 2-methyl-2-thiazoline

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      Keywords: Energy of combustion. Enthalpy of formation.   Rotating-bomb calorimeter. Static-bomb calorimeter.   2-methylbenzothiazole. 2-methylbenzoxazole.   2-methyl-2-thiazoline.

      This paper is a contribution to the special collection of   articles dedicated to Professor María Victoria Roux of CSIC-IQFR,   on occasion of her retirement.

      DOI: 10.1007/s11224-013-0340-z



      A static-bomb combustion calorimeter and a rotating-bomb   combustion calorimeter were used to determine the energies   of combustion of 2-methylbenzothiazole, 2-methylbenzoxazole,   and 2-methyl-2-thiazoline. The static and rotating-bomb   calorimeters were recently calibrated by the standard   benzoic acid combustion runs and they were tested with   adequate secondary combustion standards. The rotating-bomb   calorimeter was tested using thianthrene and, in the present   work, 1,2,4-triazole was used to test the   staticbomb calorimeter. From the energies of combustion of   the compounds under study, the liquid-phase standard   molar enthalpies of formation were derived, at T =   298.15 K, as: (72.5 ± 1.5), (-50.7 ± 2.1), and (-88.5 ± 2.8)   kJ mol-1, respectively.

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