THERMOCHEMISTRY OF SOME METALLIC AMINO-ACID COMPLEXES .1. COPPER(II) COMPLEXES

• Type: Article in International Scientific Journal
• Date: 1992

Authors

da Silva, MAVR (Author) FCUP; Maria D M C R Ribeiro da Silva (Author) FCUP; BERNARDO, MMC (Author) Other; Luis M N B F Santos (Author) FCUP

Journal

Title: Thermochimica Acta

Vol. 205

Pages: 99-113

ISSN: 0040-6031

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 11 Citations

Scopus - 4 Citations

Other information

Authenticus ID: P-001-P8X

DOI: 10.1016/0040-6031(92)85252-q

Abstract (EN): The standard (p(empty set) = 0.1 MPa) molar enthalpies of formation of the following crystalline copper(II) amino acid complexes were determined at 298.15 K by solution-reaction calorimetry: DELTA(f)H(m)empty set[Cu(gly)2, cr] = - 943.7 +/- 1.3 kJ mol-1; DELTA(f)H(m)empty set[Cu(ala)2, cr]= - 1003.7 +/- 1.5 kJ mol-1; DELTA(f)H(m)empty set[Cu(val)2, cr] = - 1124.1 +/- 2.2 kJ mol-1; DELTA(f)H(m)empty set[Cu(leu)2, cr] = - 1177.8 +/- 2.1 kJ mol-1; DELTA(f)H(m)empty set[Cu(isol)2, cr] = - 1156.3 +/- 1.8 kJ mol-1; DELTA(f)H(m)empty set[Cu(Phgly)2, cr] = - 772.3 +/- 1.9 kJ mol-1; DELTA(f)H(m)empty set[Cu(Phala)2, cr] = - 831.8 +/- 2.6 kJ mol-1. The results suggest a linear correlation between the standard molar enthalpies of formation of the crystalline copper(II) amino acid complexes and those of the corresponding crystalline amino acids. Estimations of the standard molar enthalpies of sublimation of the copper(II) amino acid complexes are presented. The total binding energy between the copper(II) and the amino acid ligand is derived and compared with the corresponding parameter for copper(II) acetylacetonate.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 15