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 deltaH degrees C(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.
