Chloroform is one of the most commonly used solvents in the NMR Facility and many users use the residual solvent peak to reference their spectra. Unfortunately, I have seen a range of values for the chemical shift of chloroform. Its possible that chloroform's chemical shift is temperature dependent and the different values were obtained at different temperatures. To test this, and to determine the correct chemical shift to use, I decided to measure the temperature dependence of the residual chloroform peak in deuterochloroform.
