Abstract
A theoretical treatment is given of the non‐catalytic bromination of naphthalene. In the bromination of liquid naphthalene in the temperature range from 85° to 215° and in the bromination of gaseous naphthalene in the presence of a non‐specific contact material (pumice or glass wool) below 300° the ratio of β‐bromonaphthalene to α‐bromonaphthalene is determined by the difference in activation energies of the simultaneous reactions. This difference in activation energies is calculated by means of approximate methods elaborated in wave mechanics.