CHELATING TENDENCIES OF PYRAZINECARBOXYLIC ACID AND 3-AMINOPYRAZINECAREOXYLIC ACID

Authors
ELGUINDI NM HASSIB HB
Citation
Nm. Elguindi et Hb. Hassib, CHELATING TENDENCIES OF PYRAZINECARBOXYLIC ACID AND 3-AMINOPYRAZINECAREOXYLIC ACID, Arabian journal for science and engineering, 20(3), 1995, pp. 549-560
Citations number
NO
Categorie Soggetti
Multidisciplinary Sciences
Journal title
Arabian journal for science and engineering → ACNP
ISSN journal
03779211
Volume
20
Issue
3
Year of publication
1995
Pages
549 - 560
Database
ISI
SICI code
0377-9211(1995)20:3<549:CTOPAA>2.0.ZU;2-3
Abstract
The chelate stability constants of pyrazinecarboxylic acid (PCA) and 3 -aminopyrazinecarboxylic acid (3-APCA) with divalent Co, Cu, Mn, and t rivalent Cr ions are reported at 25 degrees C and ionic strength 0.1 M . In addition, the study,is concerned with the effect of ionic strengt h and temperature on the chelate stability constants of the complexes with Co(ll). The relative values of the overall stability constants (l og beta(n)), in order of decreasing stability, are Co > Cu > Mn > Cr f or complexes with the two ligands (PCA and 3-APCA).