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

• Tipo: Artigo em Revista Científica Internacional
• Data: 1992

Autores

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

Revista

Título: Thermochimica Acta

Vol. 205

Páginas: 99-113

ISSN: 0040-6031

Editora: Elsevier

Indexação

ISI Web of Knowledge - 11 Citações

Scopus - 4 Citações

Outras Informações

ID Authenticus: 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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 15