Results The azo compounds [p, p'-difluoro-, p, p'-dichloro-, and m, m'-dichloroazocumenes and l, l'-di (4-tolyl) azocyclohexane] were prepared by oxidation of the corresponding amines with iodine pentafluoride according to a modificatione of the procedure of Nelsen and Bartlett. 6 The yields and physical properties are listed in Table I. Rates of decomposition were obtained by following the disappearance in the ultraviolet (uv) ...