In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Dihydropyridines. XVII. π-Electronic structure and reactivity of alkyl 3,5-dicyanopyridines, published in 1969, which mentions a compound: 1195-58-0, Name is Pyridine-3,5-dicarbonitrile, Molecular C7H3N3, Safety of Pyridine-3,5-dicarbonitrile.
The π-electronic structure of alkyl 3,5-dicyanopyridines was studied by the Hueckel M.O. L.C.A.O. method. The heteroatom model was used in the calculations The exptl. course of nucleophilic reactions was in agreement with the calculated superdelocalizabilities. Some of the exptl. excitation energies depended linearly on the calculated transition energies. Correlation was found between the values of proton shifts in the N.M.R. spectra of dicyanopyridines and the corresponding electron densities.
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