Abstract
The structures of new symmetrical and asymmetrical 1,5-dibenzazolylformazans were investigated by IR and electronic spectroscopy. It is shown that 1,5-dibenzimidazolylformazans, regardless of the substituent in the 3 position (methyl, phenyl), display the presence of the tautomeric imino form in solutions. 1,5-Dibenzothiazolylformazans display a high tendency to form chelate forms. The stability of the chelate increases on passing from the 3-methyl to the 3-phenyl derivative.
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N. P. Bednyagina, N. V. Serebryakova, and G. N. Lipunova, Khim. Geterotsikl. Soedin., 342 (1967).
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 5, pp. 699–701, May, 1973.
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Bednyagina, N.P., Lipunova, G.N. & Petrova, G.M. Tautomerism of 1,5-dibenzazolylformazans. Chem Heterocycl Compd 9, 643–645 (1973). https://doi.org/10.1007/BF00480583
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DOI: https://doi.org/10.1007/BF00480583