An NMR study of acetaldehyde methanol solutions

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Abstract

<jats:title>Abstract</jats:title> <jats:p>By the NMR method, the methanol solution of acetaldehyde was studied; in this solution all the species of hydrogen of each molecule are measurable, and a kinetic study of the system was readily performed. This could be compared with any other conventional methods, by which some of the species usually present in the system are directly measured. The formation rates of hemiacetal and acetal were measured as (8.5±1)×10−5 and (2.1±0.5)×10−5 l./mol./hr., respectively, in the absence of a catalyzer. The hydrogen exchange rates for three kinds of OH’s were also obtained. When compared with the related values in the literature, agreement is satisfactory. The relaxation times show a difference in the molecular motion corresponding to molecular structure and in the interaction with surrounding molecules.</jats:p>

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