The symmetric properties of some new 2,2′‐diindolylmethanes with chiral centers in the sidechains were investigated on the NMR time scale. Shift experiments of the chiral 2,2′‐diindolylmethanediesters 1a in the presence of 3,3,3‐trifluor‐2‐methoxy‐2‐phenylpropanoic acid were discussed.