Reproducibility of Interlaboratory Tritium N.M.R. Results and Influences of Alkyl Substituents on Chemical Shifts of Aromatic Tritons in Alkylbenzenes

Abstract

Chemical shifts for aromatic tritons have been varying by up to 0.1 ppm when measured in different laboratories. This is attributable to solvent effects. For truly identical solvents this error is shown to reduce to about 0.002 ppm (less than the digitization error). New chemical shift values for aromatic tritons in a series of alkylbenzenes are reported.