Citation
F. Gharib et Nl. Fard, Ionic strength dependence of formation constants: Complexation of dioxovanadium(V) with isoleucine, J CHEM EN D, 45(2), 2000, pp. 210-213
Citations number
16
Categorie Soggetti
Chemistry,"Chemical Engineering
Journal title
JOURNAL OF CHEMICAL AND ENGINEERING DATA
ISSN journal
00219568
→ ACNP
Volume
45
Issue
2
Year of publication
2000
Pages
210 - 213
Database
ISI
SICI code
0021-9568(200003/04)45:2<210:ISDOFC>2.0.ZU;2-K
Abstract
The stability constant for complexation of VO2+ with isoleucine has been de
termined at different ionic strengths ranging from 0.2 to 0.8 mol dm(-3) of
sodium perchlorate as a background salt, in the pH range 1.3-10 with high
ligand to metal ratios, by a combination of potentiometric and spectrophoto
metric methods at (25 +/- 0.1) degrees C. Our studies have shown that isole
ucine forms mononuclear 1:1 and 1:2 complexes with VO2+ ion. The protonatio
n constants of isoleucine were also determined potentiometrically at differ
ent ionic strengths.