Acceptor Number Induced NMR Chemical Shift in Chloroform

Abstract

Solvents have shown to have direct effect on NMR chemical shifts. Acceptor number, a measure of electrophilicity of a solvent, could cause a dramatic upfield or down field shift for a C-H bond. This study shows that there is a direct relation between acceptor number and chemical shifts. Binary solvents effect, though expected to be, is not constructive and doesn't show any competition for the shift but for each solvent.