An additional study on the infrared spectra of N-heterocycles containing the CN link is presently in progress and a communication in this respect is forthcoming.(nit atall typical of the cyclic unconjugated C= C link) has recently been the subject of a study3 on the spectral position of the CN link in nitrogen heterocycles. It has been found, as a result of this study, that unconjugated 1-pyrrolines, 2-thiazolines, and more recently dihydro-1, 3-thiazines6 ...
