Acidity constants of herbicidal sulfonylureas and sulfonamides from potentiometric determinations in aqueous dimethyl sulfoxide

Authors
Yang, GF Liu, HY Yang, HZ
Citation
Gf. Yang et al., Acidity constants of herbicidal sulfonylureas and sulfonamides from potentiometric determinations in aqueous dimethyl sulfoxide, CHEM J CH U, 20(12), 1999, pp. 1883-1887
Citations number
10
Categorie Soggetti
Chemistry
Journal title
CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE
ISSN journal
02510790 → ACNP
Volume
20
Issue
12
Year of publication
1999
Pages
1883 - 1887
Database
ISI
SICI code
0251-0790(199912)20:12<1883:ACOHSA>2.0.ZU;2-A
Abstract
The acidity constants of herbicidal sulfonylureas and sulfonamides have bee n potentiometrically determined at 25 degrees C in DMSO/H2O mixed solvent. The linear relationships between the experimental pK(a) values and the ener gy level of frontier orbital and substituent parameters have been found, wh ich suggested that pK(a) values obtained from this mixed solvent were suita ble for the structure-activity relationships analyses.