Irradiation of triarylchloroallenes in methanol afforded 1,3,3-triaryl-3-methoxypropynes, suggesting the intervention of triarylallenyl cations. Irradiation of triphenylchloroallene in ethanol and 2-propanol gave the similar results but the irradiation in t-butyl alcohol gave only the products from triphenylallenyl radical.