M. Roux, Gloria Martín-Valcárcel, R. Notario
Feb 7, 2011
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Influential Citations
15
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Journal
Journal of Chemical & Engineering Data
Abstract
This study is a multidisciplinary contribution to the thermochemistry of 1,4-cubanedicarboxylic acid (pentacyclo[4.2.0.02,5.03,8.04,7]octane-1,4-dicarboxylic acid). An isoperibolic static microbomb calorimeter was used to determine the enthalpy of formation in the condensed phase at T = 298.15 K as ΔfHm°(cr) = (−355.9 ± 11.7) kJ·mol−1. The enthalpy of sublimation was obtained by combining the vaporization enthalpy evaluated by correlation-gas chromatography and the fusion enthalpy measured by differential scanning calorimetry and adjusted to T = 298.15 K, which afforded the value ΔsubHm(298.15 K) = (126.5 ± 9.0) kJ·mol−1. Combination of these two enthalpies gave ΔfHm°(g, 298.15 K) = (−229.4 ± 14.8) kJ·mol−1. Additionally the enthalpy of sublimation of 1-adamantanecarboxylic acid (tricyclo[3.3.1.13,7]decane-1-carboxylic acid) was determined as ΔsubHm(298.15 K) = (98.7 ± 4.5) kJ·mol−1. By means of theoretical calculations using isodesmic reactions, the enthalpy of formation of 2,6-cuneanedicarboxylic acid (...