Abstract
By reacting triphenylguanidine and quinaldine ethiodide in acetic anhydride, with cadmium carbonate as the addition agent, a new dye was obtained which showed a maximum absorption at 6500Å and whose analytical values of halogen and carbon corresponded to neocyanine (Hamer type). At the same time, white crystalline substance of m. p. 167-168° (decomp.) was obtained and its treatment with conc. ammonia resulted in its transition to the above-mentioned dye from which it was assumed that the crystalline substance is an intermediate of the Hamer-type neocyanine.
