Кристаллическая структура 7-амино-8-R-3- трет -бутил-4-оксо-1,4-дигидропиразоло[5,1-c][1,2,4]триазинов

The structures of 7-amino-3-tert-butyl-4-oxo-1,4-dihydropyrazolo[5,1-c][1,2,4]triazin-8-carbonitrile and 8-ethyl carboxylate were studied by X-ray crystal diffraction analysis. Both molecules demonstrate planar conjugated heteronucleus with a marked tendency to formation of intra- and intermolecular hydrogen bonds. The molecular bond length and angles in single crystals were investigated.