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Thermochemistry and quantum chemical calculations of two dibenzocycloalkane nitriles

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Abstract

The energies of combustion and fusion of 5-cyano-5H-dibenzo[a,d]cycloheptene (1) and (5E,11E)-dibenzo[a,e]cyclooctene-5,11-dicarbonitrile (2) were measured by means of microbomb calorimetry and DSC, respectively. The derived enthalpies of formation in solid state are 320 ± 18 for nitrile 1 and 470 ± 31 kJ mol−1 for nitrile 2, respectively. The experimental enthalpies of formation are discussed in relationship with values calculated at the G3(MP2)//B3LYP level of quantum chemical theory, by means of group additivity and isodesmic reactions. The two nitriles are not stabilized by dibenzoannelation.

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Correspondence to Ştefan Perişanu.

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Perişanu, Ş., Contineanu, I., Neacşu, A. et al. Thermochemistry and quantum chemical calculations of two dibenzocycloalkane nitriles. Struct Chem 22, 89–94 (2011). https://doi.org/10.1007/s11224-010-9691-x

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  • DOI: https://doi.org/10.1007/s11224-010-9691-x

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