View More View Less
  • 1 College of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, Shandong Province, People's Republic of China
Restricted access

Abstract

Dodecylamine hydrochloride C12H25NH3·Cl(s) and bis-dodecylammonium tetrachlorozincate (C12H25NH3)2ZnCl4(s) were synthesized by the method of liquid phase reaction. The constant-volume energy of combustion of dodecylamine hydrochloride was measured by means of a RBC-II precision rotating-bomb combustion calorimeter at T = (298.15 ± 0.001) K. The standard molar enthalpy of formation of C12H25NH3·Cl(s) was calculated to be (C12H25NH3·Cl, s) = −(706.79 ± 3.97) kJ mol−1 from the constant-volume energy of combustion. In accordance with Hess’ law, a reasonable thermochemical cycle was designed and the enthalpy change of the synthesis reaction of the complex (C12H25NH3)2ZnCl4(s) was determined by use of an isoperibol solution-reaction calorimeter. The standard molar enthalpy of formation of (C12H25NH3)2ZnCl4(s) was calculated as [(C12H25NH3)2ZnCl4, s] = −(1862.14 ± 7.95) kJ mol−1 from the standard molar enthalpy of formation of C12H25NH3·Cl(s) and other auxiliary thermodynamic data.

  • 1. Lee, KW, Lee, CE, Kim, J, Kang, JK. Phase transitions and molecular motions in a model biomembrane (C12H25NH3)2SnCl6. Solid State Commun. 2002 124:185188 .

    • Crossref
    • Search Google Scholar
    • Export Citation
  • 2. Hawes, DW, Banu, D, Feldman, D. Latent heat storage in concrete II. Solar Energy Mater. 1990 21:6180 .

  • 3. Ruan, DS, Li, WP, Hu, QZ. Phase diagrams of binary systems of alkylammonium tetrachlorometallates (II). J Thermal Anal. 1995 45:235242 .

  • 4. Jakubas, R, Bator, G, Gosniowska, M, Ciunik, Z, Baran, J, Lefebvre, J. Crystal structure and phase transition of [(CH3)2NH2]GaCl4. J Phys Chem Solids. 1997 58:989998 .

    • Crossref
    • Search Google Scholar
    • Export Citation
  • 5. Li, WP, Zhang, DS, Zhang, TP, Wang, TZ, Ruan, DS, Xing, DQ, Li, HB. Study of solid–solid phase change of (n-CnH2n+1NH3)2MCl4 for thermal energy storage. Thermochim Acta. 1999 326:183186 .

    • Crossref
    • Search Google Scholar
    • Export Citation
  • 6. Clark, GL, Hudgens, CR. Preliminary results on the crystal structure of some ammonium salts with substituted aliphatic chains. Science 1950 112:309 .

    • Crossref
    • Search Google Scholar
    • Export Citation
  • 7. Pinto, AVA, Vencato, I, Gallardo, HA. X-Ray crystal structures and directional diamagnetic susceptibility calculations of decyl and dodecylammonium chlorides. Mol Cryst Liq Cryst. 1987 149:2940 .

    • Crossref
    • Search Google Scholar
    • Export Citation
  • 8. Silver, J, Marsh, PJ, Frampton, CS. n-Dodecylammonium chloride. Acta Cryst. 1995 C51:24322434.

  • 9. Gordon, M. The crystal structure of n-dodecylammonium chloride and hydrobromide. Acta Cryst.. 1953;6:739741 .

  • 10. Kong, YX, Di, YY, Zhang, YQ, Yang, WW, Tan, ZC. Investigation on phase transitions and thermodynamic properties of 1-dodecylamine hydrochloride (C12H25NH3Cl)(s) by an improved adiabatic calorimeter. Int J Thermophys. 2009 30:19601974 .

    • Crossref
    • Search Google Scholar
    • Export Citation
  • 11. Kong, YX, Di, YY, Zhang, YQ, Yang, WW, Tan, ZC. Crystal structure and thermochemical properties of 1-dodecylamine hydrochloride (C12H28NCl)(s). Thermochim Acta. 2009 495:3337 .

    • Crossref
    • Search Google Scholar
    • Export Citation
  • 12. Zhang, ZY, Yang, ML. Thermodynamic properties and phase transitions of alkylammonium tetrachlorometallates(II) between 280 and 500 K II: dodecylammonium tetrachlorozincate(II). Acta Chim Sinica. 1988 46:281284.

    • Search Google Scholar
    • Export Citation
  • 13. Kong, YX, Di, YY, Yang, WW, , YF, Tan, ZC. Crystal structure, phase transition, and thermodynamic properties of bis-dodecylammonium tetrachlorozincate (C12H25NH3)2ZnCl4(s). Chin J Chem. 2010 28:521530 .

    • Crossref
    • Search Google Scholar
    • Export Citation
  • 14. Di, YY, Tan, ZC, Sun, XH, Wang, MH, Xu, F, Liu, YF, Sun, LX, Zhang, HT. Low-temperature heat capacity and standard molar enthalpy of formation of 9-fluorenemethanol (C14H12O). J Chem Thermodyn. 2004 36:7986 .

    • Crossref
    • Search Google Scholar
    • Export Citation
  • 15. Yang, XW, Chen, SP, Gao, SL, Li, HY, Shi, QZ. Construction of a rotating-bomb combustion calorimeter and measurement of thermal effects. Instrum Sci Technol. 2002 30:311321 .

    • Crossref
    • Search Google Scholar
    • Export Citation
  • 16. Da Silva Ribeiro, MAV, Matos, MAR, Rio, CMA. Standard molar enthalpy of formation of 2,4,6-trimethylpyridine. J Chem Thermodyn 1997 29:901906 .

    • Crossref
    • Search Google Scholar
    • Export Citation
  • 17. Popov MW (1954) Thermometry and calorimetry (in Russian). Moscow: Moscow University Publishing House; 1954. p. 331.

  • 18. Di, YY, Chen, JT, Tan, ZC. Low-temperature heat capacities and standard molar enthalpy of formation of the solid-state coordination compound trans-Cu(Ala)2(s) (Ala = l-α-alanine). Thermochim Acta. 2008 471:7073 .

    • Crossref
    • Search Google Scholar
    • Export Citation
  • 19. Kong, YX, Di, YY, Qi, YD, Yang, WW, Tan, ZC. Low-temperature heat capacities and standard molar enthalpy of formation of sodium benzoate C6H5COONa(s). Thermochim Acta. 2009 488:2732 .

    • Crossref
    • Search Google Scholar
    • Export Citation
  • 20. Rychly, R, Pekarek, V. The use of potassium chloride and tris(hydroxymethyl)aminomethane as standard substances for solution calorimetry. J Chem Thermodyn. 1977 9:391396 .

    • Crossref
    • Search Google Scholar
    • Export Citation
  • 21. Cox, JD, Wagman, DD, Medvedev, VA CODATA key values for thermodynamics Hemisphere Publishing Corp New York 1989.

  • 22. Speight, JG Lange's handbook of chemistry 2005 16 McGraw-Hill Companies Inc New York 279.