Abstract
The enthalpy of combustion of thianthrene (diphenylene disulfide) has been determined in an oxygen-bomb calorimeter. The enthalpy of formation has been derived using data from the available literature. The results obtained are as follows: C 12 H 8 S 2 ( c ) + 17 O 2 ( g ) + 228 H 2 O ( liq ) = 12 CO 2 ( g ) + 2 [ H 2 SO 4 + 115 H 2 O ] ( liq ) Δ H c ° ( 25 ° C ) = - 7253.27 ± 1.40 kJ / mol ( - 1733.65 ± 0.33 kcal / mol ) Δ H f ° ( 25 ° C ) = 184.23 ± 1.50 kJ / mol ( 44.03 ± 0.36 kcal / mol ) A comparison is given of the results of this investigation with those of previous investigators.

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