Thermodynamics of cadmium halide complex formation in acetamide-calcium nitrate tetrahydrate melt
Apstrakt
The complex formation between cadmium(II) ions and chloride and bromide ions in the melt of 0.8CH(3)CONH(2)-0.2Ca(NO3)(2). 4H(2)O has been studied at six temperatures between 30 and 80 degreesC. The formation constants of the complexes CdX+ and CdX2 (X=CI, Br) were determined from Emf measurements by means of Ag/AgX electrodes. The thermodynamic parameters DeltaH(mn)degrees and DeltaS(mn)degrees for the stepwise complex formation [GRAPHICS] have been estimated. The results are DeltaH(11)degrees = 4.2 kJ mol(-1). DeltaS(11)degrees = 52.4 J K-1 mol(-1), DeltaH(12)degrees = 3.3 kJ mol(-1) DeltaS(12)degrees = 40.7 J K-1 mol(-1) for the chloride complexes and DeltaH(11)degrees = -3.3 kJ mol(-1), DeltaS(11)degrees = 33.0 J K-1 mol(-1), DeltaH(12)degrees = -2.5 kJ mol(-1), DeltaS(12)degrees = 30.4 J K-1 mol(-1) for the bromide complexes. The parameters are compared with the literature data for the same process in dilute aqueous solutions and in some hydrated salt melts.
Izvor:
Magyar Kemiai Folyoirat, 2001, 107, 1, 36-42Kolekcije
Institucija/grupa
VinčaTY - JOUR AU - Zsigrai, Istvan J. AU - Gadžurić, Slobodan AU - Nikolic, RM PY - 2001 UR - https://vinar.vin.bg.ac.rs/handle/123456789/2412 AB - The complex formation between cadmium(II) ions and chloride and bromide ions in the melt of 0.8CH(3)CONH(2)-0.2Ca(NO3)(2). 4H(2)O has been studied at six temperatures between 30 and 80 degreesC. The formation constants of the complexes CdX+ and CdX2 (X=CI, Br) were determined from Emf measurements by means of Ag/AgX electrodes. The thermodynamic parameters DeltaH(mn)degrees and DeltaS(mn)degrees for the stepwise complex formation [GRAPHICS] have been estimated. The results are DeltaH(11)degrees = 4.2 kJ mol(-1). DeltaS(11)degrees = 52.4 J K-1 mol(-1), DeltaH(12)degrees = 3.3 kJ mol(-1) DeltaS(12)degrees = 40.7 J K-1 mol(-1) for the chloride complexes and DeltaH(11)degrees = -3.3 kJ mol(-1), DeltaS(11)degrees = 33.0 J K-1 mol(-1), DeltaH(12)degrees = -2.5 kJ mol(-1), DeltaS(12)degrees = 30.4 J K-1 mol(-1) for the bromide complexes. The parameters are compared with the literature data for the same process in dilute aqueous solutions and in some hydrated salt melts. T2 - Magyar Kemiai Folyoirat T1 - Thermodynamics of cadmium halide complex formation in acetamide-calcium nitrate tetrahydrate melt VL - 107 IS - 1 SP - 36 EP - 42 UR - https://hdl.handle.net/21.15107/rcub_vinar_2412 ER -
@article{ author = "Zsigrai, Istvan J. and Gadžurić, Slobodan and Nikolic, RM", year = "2001", abstract = "The complex formation between cadmium(II) ions and chloride and bromide ions in the melt of 0.8CH(3)CONH(2)-0.2Ca(NO3)(2). 4H(2)O has been studied at six temperatures between 30 and 80 degreesC. The formation constants of the complexes CdX+ and CdX2 (X=CI, Br) were determined from Emf measurements by means of Ag/AgX electrodes. The thermodynamic parameters DeltaH(mn)degrees and DeltaS(mn)degrees for the stepwise complex formation [GRAPHICS] have been estimated. The results are DeltaH(11)degrees = 4.2 kJ mol(-1). DeltaS(11)degrees = 52.4 J K-1 mol(-1), DeltaH(12)degrees = 3.3 kJ mol(-1) DeltaS(12)degrees = 40.7 J K-1 mol(-1) for the chloride complexes and DeltaH(11)degrees = -3.3 kJ mol(-1), DeltaS(11)degrees = 33.0 J K-1 mol(-1), DeltaH(12)degrees = -2.5 kJ mol(-1), DeltaS(12)degrees = 30.4 J K-1 mol(-1) for the bromide complexes. The parameters are compared with the literature data for the same process in dilute aqueous solutions and in some hydrated salt melts.", journal = "Magyar Kemiai Folyoirat", title = "Thermodynamics of cadmium halide complex formation in acetamide-calcium nitrate tetrahydrate melt", volume = "107", number = "1", pages = "36-42", url = "https://hdl.handle.net/21.15107/rcub_vinar_2412" }
Zsigrai, I. J., Gadžurić, S.,& Nikolic, R.. (2001). Thermodynamics of cadmium halide complex formation in acetamide-calcium nitrate tetrahydrate melt. in Magyar Kemiai Folyoirat, 107(1), 36-42. https://hdl.handle.net/21.15107/rcub_vinar_2412
Zsigrai IJ, Gadžurić S, Nikolic R. Thermodynamics of cadmium halide complex formation in acetamide-calcium nitrate tetrahydrate melt. in Magyar Kemiai Folyoirat. 2001;107(1):36-42. https://hdl.handle.net/21.15107/rcub_vinar_2412 .
Zsigrai, Istvan J., Gadžurić, Slobodan, Nikolic, RM, "Thermodynamics of cadmium halide complex formation in acetamide-calcium nitrate tetrahydrate melt" in Magyar Kemiai Folyoirat, 107, no. 1 (2001):36-42, https://hdl.handle.net/21.15107/rcub_vinar_2412 .