On November 13, 2014, Rayer, Aravind V.; Sumon, Kazi Z.; Jaffari, Laila; Henni, Amr published an article.Product Details of 2160-93-2 The title of the article was Dissociation Constants (pKa) of Tertiary and Cyclic Amines: Structural and Temperature Dependences. And the article contained the following:
The dissociation constants of the conjugate acids of 14 amines (diethylethanolamine, monoethanolamine, n-butyldiethanolamine, t-butyldiethanolamine, n,n-dimethylpropanolamine, methyl-diethanolamine, ethyldiethanolamine, monoethylethanolamine, n,n-dimethylisopropanolamine, triethanolamine, 4-methylpiperazine-1-amine, 3-morpholino propylamine, 4,2-hydroxylethylmorpholine, and triethylamine) were measured over a temperature range between 293.15 and 333.15 K using the potentiometric titration method. The change in standard state thermodn. properties was derived from the van’t Hoff equation. The influence of the steric hindrance, number of -OH groups, and length of alkyl chain on the dissociation constants was identified. Of the studied amines, few sterically hindered derivatives of piperazine, a secondary amine monoethylethanolamine, and a tertiary amine n,n-dimethylpropanolamine have high pKa values but lower standard enthalpy than those of the benchmark amine, monoethanolamine (MEA), and thus were deemed promising for CO2 capture technol. Monoethylethanolamine (MEEA) was found to have the highest basicity (pKa) with the lowest standard state enthalpy (ΔH°/kJ·mol-1). The experimental process involved the reaction of 2,2′-(tert-Butylazanediyl)diethanol(cas: 2160-93-2).Product Details of 2160-93-2
The Article related to dissociation constant tertiary cyclic amine structural temperature dependence, Phase Equilibriums, Chemical Equilibriums, and Solutions: Acid-Base Equilibriums, Complex Formation and other aspects.Product Details of 2160-93-2
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