THERMOCHEMISTRY OF SOME METALLIC AMINO-ACID COMPLEXES .2. NICKEL(II) COMPLEXES

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

Authors

DASILVA, MAVR (Author) FCUP; DASILVA, MDMCR (Author) FCUP; TUNA, JABA (Author) Other; SANTOS, LMNBF (Author) FCUP

Journal

Title: Thermochimica Acta

Vol. 205

Pages: 115-125

ISSN: 0040-6031

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 13 Citations

Scopus - 12 Citations

Scientific classification

FOS: Natural sciences > Chemical sciences

Other information

Authenticus ID: P-001-P8Y

DOI: 10.1016/0040-6031(92)85253-r

Abstract (EN): The standard (p(empty set) = 0.1 MPa) molar enthalpies of formation of the following crystalline nickel(IU) amino acid complexes were determined, at 298.15 K, by solution-reaction calorimetry: DELTA(f)Hm(empty set([Ni(gly)2, cr] = - 994.2 +/- 1.8 kJ mol-1; DELTA(f)H(m)empty set[Ni(ala)2, cr] = - 1072.4 +/- 2.3 kJ mol-1; DELTA(f)H(m)empty set[Ni(val)2, cr] = - 1173.7 +/- 2.5 kJ mol-1; DELTA(f)H(m)empty set[Ni(leu)2, cr] = - 1243.4 +/- 2.7 kJ mol-1; DELTA(f)H(m)empty set[Ni(isol)2, cr] = - 1224.1 +/- 2.1 kJ mol-1; DELTA(f)H(m)empty set[Ni(Phgly)2, cr] = - 857.0 +/- 2.8 kJ mol-1; DELTA(f)H(m)empty set[Ni(Phala)2, cr] = - 898.6 +/- 3.0 kJ mol-1. A linear correlation between the standard molar enthalpies of formation of the crystalline nickel(II) amino acid complexes and the crystalline amino acids is established. Estimations of the standard molar enthalpies of sublimation of the nickel(II) amino acid complexes are presented. The total binding energies in nickel(II) complexes of amino acids and of beta-diketonate ligands are compared.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 11