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《CHEMICAL RESEARCH IN CHINESE UNIVERSITIES》 1999-12
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Acidity Constants of Herbicidal Sulfonylureas and Sulfonamides from Potentiometric Determinations in Aqueous Dimethyl Sulfoxide

YANG Guang Fu, LIU Hua Yin, YANG Hua Zheng * (National Key Laboratory of Elemento Organic Chemistry, Institute of Elemento Organic Chemistry, Nankai University, Tianjin 300071, China)  
The acidity constants of herbicidal sulfonylureas and sulfonamides have been potentiometrically determined at 25 ℃ in DMSO/H 2O mixed solvent. The linear relationships between the experimental p K a values and the energy level of frontier orbital and substituent parameters have been found, which suggested that p K a values obtained from this mixed solvent were suitable for the structure activity relationships analyses.
【Fund】: 国家自然科学基金!(批准号 :29832050)资助课题
【CateGory Index】: TQ450.7
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