| Abstract: | Abstract In connection with other studies we synthesized and obtained low resolution electron impact spectra of the 2,2′-, 2,3′-, 2,4′-, 3,3′-, 3,4′-, and 4,4′-dimethyl substituted diphenylmethanes. The results suggest that caution should be exercised in using the characteristic even mass rearrangement fragment (m/e = 104) produced by the “ortho-effect” as the only method to distinguish between ortho and non-ortho methyl substituted diphenyl-methanes. The relationship between the stability of the diphenylmethane isomers and the substitution patterns at the meta and para positions does not parallel that observed for the dimethyl substituted biphenyls. |
