Electron spectra of 4-substituted 1,2,4-triazine-3(2H)-thion(one)-5(4H)-ones

Substitution reactions in 1,2,4-triazine-3,5-thiones are studied. Their interaction with sodium nitrite in a hydrochloric acid medium and with N,N-dimethylcarbamoylbromide yields the 4-nitroso, azo, and carbamoyl derivatives of 1,2,4-triazines. The assignment of absorption bands in electron spectra of the compounds is discussed. Sumy State University, 2, Korsakov St., Sumy, 244007, Ukraine. Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 64, No. 1, pp. 112–115, January–February, 1997.