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KINETIC AND THERMODYNAMIC PARAMETERS FOR SCHIFF-BASE FORMATION BETWEEN 5'-DEOXYPYRIDOXAL AND HEXYLAMINE

被引：24
作者：
VAZQUEZ, MA
DONOSO, J
MUNOZ, F
BLANCO, FG
DELVADO, MAG
ECHEVARRIA, G
机构：
[1] UNIV ALCALA DE HENARES,DEPT QUIM FIS,E-28871 ALCALA DE HENARES,SPAIN
[2] UNIV ISLAS BALEARES,FAC CIENCIAS,DEPT QUIM,E-07071 PALMA DE MALLORCA,SPAIN
[3] UNIV COMPLUTENSE,FAC FARM,DEPT FIS QUIM,E-28040 MADRID,SPAIN
来源：
HELVETICA CHIMICA ACTA | 1990年 / 73卷 / 07期
关键词：
D O I：
10.1002/hlca.19900730723
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The thermodynamic parameters involved in the formation of Schiff bases between 5′‐deoxypyridoxal and hexylamine were determined at different pH values and a constant ionic strength (0.1 M). The overall and individual rale constants of formation and hydrolysis at 10, 15, 20, 25, and 30° were also determined. The enthalpy of the overall formation process was found to be negative at all the pH values assayed except the neutral, while its entropy was always positive. The results obtained show the great relevance of the phosphate group at C(5′) to the stabilization of the Schiff bases of pyridoxal 5′‐phosphate. Copyright © 1990 Verlag GmbH & Co. KGaA, Weinheim
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页码：1991 / 1998
页数：8
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