Carbon‐13 chemical shifts of some model carboxylic acids and esters

Abstract Selected model carboxylic acids and esters dissolved in deuteriochloroform have been studied by carbon‐13 nuclear magnetic resonance under standardized conditions. Assignments of the chemical shifts have been made for all samples, and the spin–lattice relaxation times and nuclear Overhauser effects measured for a few selected esters. The results are intended to provide a practical aid for the analysis of carboxylic acids and esters of a more complex nature (e.g. polymers, natural products, etc.).