Abstract
A new crystalline complex (C8H17NH3)(2)CuCl4(s) (abbreviated as C8Cu(s)) was synthesized by liquid phase reaction. Chemical analysis, elemental analysis, and X-ray crystallography were applied to characterize the composition and crystal structure of the complex. Low-temperature heat capacities of the complex were measured by a precision automatic adiabatic calorimeter over the temperatures ranging from 78 to 395 K, and two solid-solid phase changes appeared in the heat capacity curve. The temperatures, molar enthalpies and entropies of the two phase transitions of the complex were determined to be: T (trs, 1) = 309.4 +/- A 0.35 K, Delta(trs) H (m, 1) = 16.55 +/- A 0.41 kJ mol(-1), and Delta(trs) S (m, 1) = 53.49 +/- A 1.3 J K-1 mol(-1) for the first peak; T (trs, 2) = 338.5 +/- A 0.63 K, Delta(trs) H (m, 2) = 6.500 +/- A 0.10 kJ mol(-1), and Delta(trs) S (m, 2) = 19.20 +/- A 0.28 J K-1 mol(-1) for the second peak. Two polynomial equations of the heat capacities as a function of the temperature were fitted by least-square method. Smoothed heat capacities and thermodynamic functions of the complex relative to the standard reference temperature of 298.15 K were calculated based on the fitted polynomial equations.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
