Enthalpy of sublimation/vaporization of trans-cyclohexyl-1,4-diamine and cis-cyclohexyl-1,2-diamine

• Main Author: Tomé, Luciana I. N.
• Publication Date: 2007
• Other Authors: Rosado, Mário T. S., Nunes, Sandra C. C., Maria, Teresa M. R., Canotilho, João, Eusébio, M. Ermelinda S.
• Format: Article
• Language: eng
• Source: Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
• Download full: https://hdl.handle.net/10316/5035
• topic: trans-Cyclohexyl-1,4-diamine; cis-Cyclohexyl-1,2-diamine; Sublimation/vaporization; Cyclohexyldiamines

The molar enthalpy of sublimation, , of trans-cyclohexyl-1,4-diamine and the molar enthalpy of vaporization, , of cis-cyclohexyl-1,2-diamine, at the temperature 298.15 K, were determined by calorimetry. was obtained for the trans-isomer and for the cis form. The molar enthalpy of fusion of the first compound, at T = 342.1 K, was determined by differential scanning calorimetry. The molar enthalpy of vaporization of the 1,4-isomer was estimated by combining the value of the enthalpy of sublimation with that of the enthalpy of fusion.