The complexes of tetramethylresorc[4]arene with amines. Effect of the amine concentration on the complex composition |
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| Authors: | Waldemar Iwanek Mariusz Urbaniak |
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| Affiliation: | a Institute of Chemistry, Pedagogical University, Ch!["Image"]("http://www.sciencedirect.com/cache/MiamiImageURL/B6THR-44GF46S-3-1/0?wchp=dGLbVzW-zSkWb" "\"Image\"") ci!["Image"]("http://www.sciencedirect.com/cache/MiamiImageURL/B6THR-44GF46S-3-2/0?wchp=dGLbVzW-zSkWb" "\"Image\"") ska 5, 25020 Kielce, Poland;b Facultet of Chemistry, Jagiellonian University, Ingardena 3, 30060 Kraków, Poland |
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| Abstract: | The complexation of tetramethylresorc[4]arene with primary and secondary amines in acetonitrile was investigated spectrophotometrically. The stoichiometry of the complexes formed was shown to depend on the amine concentration. Based on the proposed complexation models, the formation constants of the complexes as well as their thermodynamical parameters were determined and discussed. Depending on the amine concentration, two types of solid complexes of tetramethylresorc[4]arene with amines were obtained. The composition of these complexes was confirmed by 1H NMR. |
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| Keywords: | tetramethylresorc[4]arene-amine complexes UV–VIS spectroscopy hydrogen bond |
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