Experimental determination of the enthalpy of formation of dibenzo- p-dioxin

Thermochemical Properties, ΔfH°(298.15 K), S°(298.15 K), and Cp°(T), of 1,4-Dioxin, 2,3-Benzodioxin, Furan, 2,3-Benzofuran, and Twelve Monochloro and Dichloro Dibenzo-p-dioxins and Dibenzofurans

“…This result is in good agreement with the experimental value, ⌬ f H°(298.15 K)ϭϪ50.1Ϯ2.2 kJ"mol Ϫ1 , determined by Pimenova et al 36 The enthalpy of formation of 2,3-benzofuran, ⌬ f H°(298.15 K)ϭ17.0 kJ"mol Ϫ1 , is obtained from reaction ͑R11͒ based on the ⌬ f H°(298.15 K) value of furan computed above. This result is in good agreement with the experimental value, ⌬ f H°(298.15 K)ϭϪ50.1Ϯ2.2 kJ"mol Ϫ1 , determined by Pimenova et al 36 The enthalpy of formation of 2,3-benzofuran, ⌬ f H°(298.15 K)ϭ17.0 kJ"mol Ϫ1 , is obtained from reaction ͑R11͒ based on the ⌬ f H°(298.15 K) value of furan computed above.…”

“…In 1999, Kolesov et al 35 published ⌬ f H°(298.15 K)ϭϪ59.2Ϯ4.4 kJ"mol Ϫ1 for dibenzo-pdioxin, based on a rotating-bomb calorimeter experiment; this value, Ϫ59.2Ϯ3.8 kJ"mol Ϫ1 , was adopted by Dorofeeva et al 33 In a recent article by Pimenova et al, 36 coauthored with Kolesov, a redetermined value, ⌬ f H°(298.15 K) ϭϪ50.1Ϯ2.2 kJ"mol Ϫ1 , for dibenzo-p-dioxin was reported. Here they indicated that low purity caused the different results in their earlier experiments.…”

Mechanisms for formation, chlorination, dechlorination and destruction of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs)

“…Experimentally, enthalpies of formation have been determined for non-chlorinated congeners DF and DD and a few chlorinated congeners of DD. The enthalpy of formation of DF in the gas phase was measured by Shaub [ [217] (À11.9 AE 0.50 kcal/mol) using a rotating bomb calorimeter. This technique was also used by Kolesov et al [216] to obtain enthalpies of formation of 1-MCDD (À22.1 AE 4.8 kcal/mol), 2-MCDD (À17.7 AE 8 kcal/mol) and 2,3-dichlorodibenzo-p-dioxin (À26.7 AE 1.65 kcal/mol).…”

Interplay of thermochemistry and structural chemistry, the journal (volume 24, 2013, issues 5–6) and the discipline

“…13 kJ mol (phenoxathiin) -1 (the value for dibenzodioxin was obtained from [62], while that of thianthrene was obtained from [61]. Beheshtian et al [63] studied the functionalization of a graphitic boron nitride sheet by N 2 H 4 .…”