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Standard molar enthalpies of formation of 5- and 6-nitroindazole

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Abstract

The present work reports the experimental determination of the standard (p o = 0.1 MPa) molar enthalpies of formation in the condensed and gaseous phases, at T = 298.15 K, of 5- and 6-nitroindazole. These results were derived from the measurements of the standard molar energies of combustion, using a static bomb calorimeter and from the standard molar enthalpies of sublimation derived by the application of Clausius–Clapeyron to the temperature dependence of the vapour pressures measured by the Knudsen effusion technique. The results are interpreted in terms of the energetic contributions of the nitro groups in the different positions of the aromatic ring.

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Acknowledgements

Thanks are due to Fundação para a Ciência e Tecnologia (FCT), Lisbon, Portugal and to FEDER for financial support to Centro de Investigação em Química, University of Porto. Joana Cabral thanks FCT and the European Social Fund (ESF) under the Community Support Framework (CSF) for the award of a postdoctoral fellowship with reference (BPD/27140/2006).

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  1. Department of Chemistry, Faculty of Science, Centro de Investigação em Química, University of Porto, Rua do Campo Alegre, 687, 4169-007, Porto, Portugal

    Manuel A. V. Ribeiro da Silva & Joana I. T. A. Cabral

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  1. Manuel A. V. Ribeiro da Silva
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  2. Joana I. T. A. Cabral
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Correspondence to Manuel A. V. Ribeiro da Silva.

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Ribeiro da Silva, M.A.V., Cabral, J.I.T.A. Standard molar enthalpies of formation of 5- and 6-nitroindazole. J Therm Anal Calorim 100, 457–464 (2010). https://doi.org/10.1007/s10973-009-0648-5

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