Nematic mixture methods for the determination of chemical shift anisotropy

The discrepancy in the 1H and 13C chemical shift anisotropy values for chloroform determined using ENEMIX and other methods [J. Vaara, K. Oikarinen, J. Jokisaari, J. Lounila, Chem. Phys. Lett. 253 (1996) 340] has been shown to arise from the use of the reference compound and not because of hydrogen bonding between chloroform and the cyanide group of the solvent used. The NEMIX method [C.L. Khetrapal, A.C. Kunwar, Chem. Phys. Lett. 82 (1981) 170] is shown to give more consistent results.