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- Title
Heat capacities and thermodynamic properties of ( S)- tert-butyl 1-phenylethylcarbamate.
- Authors
Zeng, Ju-Lan; Yu, Sai-Bo; Tong, Bo; Sun, Li-Xian; Tan, Zhi-Cheng; Cao, Zhong; Yang, Dao-Wu; Zhang, Jing-Nan
- Abstract
n N- tert-butyloxycarbonylated organic synthesis intermediate, ( S)- tert-butyl 1-phenylethylcarbamate, was prepared and investigated by means of differential scanning calorimetry (DSC) and thermogravimetry (TG). The molar heat capacities of ( S)- tert-butyl 1-phenylethylcarbamate were precisely determined by means of adiabatic calorimetry over the temperature range of 80-380 K. There was a solid-liquid phase transition exhibited during the heating process with the melting point of 359.53 K. The molar enthalpy and entropy of this transition were determined to be 29.73 kJ mol and 82.68 J K mol based on the experimental C- T curve, respectively. The thermodynamic functions, [ $$ H_{T}^{0} - H_{298.15}^{0} $$] and [ $$ S_{T}^{0} - S_{298.15}^{0} $$], were calculated from the heat capacity data in the temperature range of 80-380 K with an interval of 5 K. TG experiment showed that the pyrolysis of the compound was started at the temperature of 385 K and terminated at 510 K within one step.
- Subjects
ORGANIC synthesis; THERMODYNAMICS; INTERMEDIATES (Chemistry); CARBONYL compounds; CARBAMATES; CALORIMETRY; THERMOGRAVIMETRY; TEMPERATURE effect; ENTHALPY
- Publication
Journal of Thermal Analysis & Calorimetry, 2011, Vol 103, Issue 3, p1087
- ISSN
1388-6150
- Publication type
Article
- DOI
10.1007/s10973-010-1155-4