Abstract
The effect of structure on the thermal properties of dipyrrolylmethanes, dipyrrolylmethenes, bis (dipyrrolylmethenes), their salts, and chelates is analyzed proceeding from the results of thermogravimetric analysis. The common tendency is a decrease in the thermal stability of compounds with a disturbed symmetry of alkyl substitution of ligands and with a higher degree of their alkylation, with the increased size of alkyl substituents, with the nitrogen atom in the five-member cycles replaced by S or O. The opposite effect occurs at the change in the mode of attaching methylene spacer in going from 2,2′- to 3,3′-bis(dipyrrolylmethenes). The effects of the themostabilization of the ligands of linear oligopyrroles in the composition of chelates and HBr salts are evaluated quantitatively.
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Original Russian Text © E.V. Antina, G.B. Gusev, E.V. Rumyantsev, N.A. Dudina, 2009, published in Zhurnal Obshchei Khimii, 2009, Vol. 79, No. 9, pp. 1543–1552.
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Antina, E.V., Gusev, G.B., Rumyantsev, E.V. et al. Thermal properties of ligands, salts and metal complexes of linear oligopyrroles. Russ J Gen Chem 79, 1900–1909 (2009). https://doi.org/10.1134/S1070363209090163
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DOI: https://doi.org/10.1134/S1070363209090163