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Structure of piperidinoethyl esters of alkoxyphenylcarbamic acids and their thermodynamic parameters

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Abstract

The melting temperature of nine piperidinoethyl esters of alkoxyphenylcarbamic acid (hexaoxy-octyloxy) including all site isomers was investigated. The analyses were performed using DSC apparatus, sample mass ranged from 0.2 to 2.5 mg, heating rate was 5 K min-1 and in static air atmosphere. On the basis of melting peak, thermodynamic figures like: enthalpy, entropy, height and area of the peak and temperature of the partial peak were fixed. For evaluation of the results Principal Component Analysis was applied. Thanks to this method the influence of length (mass) and position of alkoxy substituents on the thermodynamic parameters of melting of compounds under investigation were determined.

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Authors and Affiliations

  1. Department of Inorganic and Analytical Chemistry, Faculty of Pharmacy, K. Marcinkowski University of Medical Sciences in Poznan, ul. Grunwaldzka 6, 60-780, Poznan, Poland

    M. H. Umbreit & P. Nowicki

  2. Department of Pharmaceutical Chemistry, Pharmaceutical Faculty, ul. Odbojarov 10, 832-32, Bratislava 3, Slovakia

    J. Cicmárik

Authors
  1. M. H. Umbreit
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  2. J. Cicmárik
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  3. P. Nowicki
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Umbreit, M.H., Cicmárik, J. & Nowicki, P. Structure of piperidinoethyl esters of alkoxyphenylcarbamic acids and their thermodynamic parameters. Journal of Thermal Analysis and Calorimetry 74, 287–292 (2003). https://doi.org/10.1023/A:1026306609621

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