A series of 2-, 7-, 10-, and 11-chloro-substituted triptycenes were prepared by means of the addition of benzyne or 3-chlorobenzyne to anthracene and its derivatives for studying the effect of chloro-substituent on electronic and NMR spectra. It was found that the intensity of the longest wavelength bands in the chlorotriptycenes could be explained in terms of superposition of three benzenoid chromophores, and that the calculated value of chloro-group on magnetic anisotropy was in good agreement with the values reported.