Abstract
Structures of (E)-2-(6-tert-butyl-5-oxo-4,5-dihydro-1,2,4-triazine-3(2H)-ylidene)-3-oxo-3-phenylpropionitrile 2a, 2-(6-tert-butyl-(5-oxo- and 4,5-dihydro-)1,2,4-triazine-3(2H)-ylidene)malononitriles 2b, 9 and 10, and a series of tert-butyl-2-(6-tert-butyl-(3-cyanomethyl, carbethoxy-, and carbisobutoxy)-5-oxo-1,2,4-triazine-2(5H)-yl)acetates 8a, 11a,b are studied for the first time by single-crystal XRD. The synthesis pathway of the 8a heterocycle is studied using deuterium labeling. Tautomerism, bond lengths, and isomeric packing of 3-cyanomethyl- and 3-cyanomethylene-1,2,4-triazines in crystals are discussed. Non-covalent interactions are considered using the Hirshfeld surface analysis.
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Russian Text © The Author(s), 2022, published in Zhurnal Strukturnoi Khimii, 2022, Vol. 63, No. 12, 102825.https://doi.org/10.26902/JSC_id102825
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Ivanov, S.M., Koltun, D.S. CRYSTAL STRUCTURE OF 6-tert-BUTYL-3-DICYANOMETHYLENE-, 3-CYANOMETHYL-, AND 3-CARBALKOXY-1,2,4-TRIAZINES. J Struct Chem 63, 1949–1962 (2022). https://doi.org/10.1134/S002247662212006X
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DOI: https://doi.org/10.1134/S002247662212006X