Abstract

The enthalpies of combustion of indan and seven alkylindans were determined by oxygen-bomb combustion calorimetry. The following values, based on the mass of sample burned, are reported for the standard enthalpy of combustion ΔH°o(298.15 K)/kcal mol−1 of these compounds in the condensed state: indan(l), −(1190.84 ± 0.33); 1,1-dimethylindan(l), −(1499.97 ± 0.42); 4,6-dimethylindan(l), −(1497.54 ± 0.36); 4,7-dimethylindan(l), −(1497.07 ± 0.35); 1,1,4,6-tetramethylindan(l), −(1805.99 ± 0.65); 1,1,4,7-tetramethylindan(l), −(1807.89 ± 0.41); 1,1,4,6,7-pentamethylindan(c), −(1958.01 ± 0.48); and 1,1-dimethyl-6-tert-butylindan(l), −(2120.57 ± 0.58). Enthalpies of formation in the condensed state are derived.

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