测定 pKa 值未知的二元有机碱 4,4′-三亚甲基二哌啶 (TMDP) 的 pKa1 和 pKa2 值

IF 1.4 4区化学 Q4 CHEMISTRY, PHYSICAL Journal of Solution Chemistry Pub Date : 2024-01-08 DOI:10.1007/s10953-023-01348-2

Lia Zaharani, Nader Ghaffari Khaligh

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引用次数: 0

摘要

在 298 K 温度下，通过 pH 度量滴定法测定了 4,4′-三亚甲基二哌啶（TMDP）的酸解离常数（pKa1 和 pKa2）的负对数值，并将实验测定的 pKa 值与 ACD/Labs 和 ChemAxon 等化学生物信息学软件预测的 pKa 值进行了比较。该实验为加深对亨德森-哈塞尔巴赫方程、酸碱解离常数（Ka/Kb）和半等价点的理解提供了极好的机会。

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Determining the pKa1 and pKa2 Values of 4,4′-Trimethylenedipiperidine (TMDP), a Diprotic Organic Base with Unknown pKa Values

The negative logarithm of the acid dissociation constant values (pK_a1 and pK_a2) of 4,4′-trimethylenedipiperidine (TMDP) was determined by a pH metric titration at 298 K. The experimentally determined pK_a values were compared with the predicted pK_a values by chem-bioinformatics software like ACD/Labs and ChemAxon. This experiment gave an excellent opportunity to deepen engagement with the Henderson–Hasselbalch equation, acid/base dissociation constant (K_a/K_b), and half equivalence point.

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来源期刊

Journal of Solution Chemistry 化学-物理化学

CiteScore

2.30

自引率

0.00%

发文量

审稿时长

3-8 weeks

期刊介绍： Journal of Solution Chemistry offers a forum for research on the physical chemistry of liquid solutions in such fields as physical chemistry, chemical physics, molecular biology, statistical mechanics, biochemistry, and biophysics. The emphasis is on papers in which the solvent plays a dominant rather than incidental role. Featured topics include experimental investigations of the dielectric, spectroscopic, thermodynamic, transport, or relaxation properties of both electrolytes and nonelectrolytes in liquid solutions.