Determination of pK_a Values for Acrylic, Methacrylic and Itaconic Acids by ¹H and ¹³C NMR in Deuterated Water
Pages 7-18
Emma Lilia Ibarra-Montaño, Norma Rodríguez-Laguna, Aníbal Sánchez-Hernández and Alberto Rojas-Hernández

DOI: http://dx.doi.org/10.6000/1929-5030.2015.04.01.2

Published: 25 Feburary 2015

Abstract: Acrylic, methacrylic and itaconic acids have Brønsted acidity given by carboxylic groups, and they are extensively used in polymerization for modification of several soft-mater materials. By this reason it is important to propose better characterization studies and alternatives to obtain more of their physicochemical properties. In this work the pK_a values of these acids are obtained by adjusting NMR chemical shifts for hydrogen and carbon nuclei as a function of pH with program HYPNMR, and compared with those obtained by potentiometric and conductometric titrations.