Crystal structure and thermochemical properties of bis(1-octylammonium) tetrachlorocuprate

Bis(1-octylammonium) tetrachlorocuprate (1-C 8 H 17 NH 3 ) 2 CuCl 4 (s) was synthesized by the method of liquid phase reaction. The crystal structure of the compound has been determined by X-ray crystallography. The lattice potential energy was obtained from the crystallographic data. Molar enthalpies of dissolution of (1-C 8 H 17 NH 3 ) 2 CuCl 4 (s) at various molalities were measured at 298.15 K in the double-distilled water by means of an isoperibol solution-reaction calorimeter, respectively. In terms of Pitzer’s electrolyte solution theory, the molar enthalpy of dissolution of (1-C 8 H 17 NH 3 ) 2 CuCl 4 (s) at infinite dilution was determined to be _ s H_m^∞ = - 5. 9 7 2 kJ mol^ - 1 , and the sums of Pitzer’s parameters (4β_C_ 8H_ 1 7NH_ 3 , Cl^ ( 0 )L + 2β_Cu,Cl^ ( 0 )L + θ_C_ 8H_ 1 7NH_ 3 , Cu^L ) and (2β_C_ 8H_ 1 7NH_ 3 , Cl^ ( 1 )L + β_Cu,Cl^ ( 1 )L ) were obtained.