pH-Driven Variation of the Outer-Sphere Binding Mode of cis-[Co(Ad)(en)2Cl]Cl (en-Ethylendiamine, Ad-Adeninate) with p-Sulfonatothiacalix[4]arene |
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| Authors: | V. V. Skripacheva A. R. Mustafina V. A. Burilov L. F. Galiullina Sh. K. Latypov S. E. Solov’eva I. S. Antipin A. I. Konovalov |
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| Affiliation: | (1) A.E. Arbuzov Institute of Organic and Physical Chemistry, Kazan Research Center of the Russian Academy of Sciences, Arbuzov str. 8, Kazan, 420088, Russia;(2) Chemistry Institute, Kazan State University, Kremlyovskaya Str., 18, 420008 Kazan, Russia |
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| Abstract: | The non-symmetrical cobalt (III) complex cis-[Co(Ad)(en)2Cl]Cl (1Cl), possessing two flexible ethylendiaminate chelate rings (en) and monodentate N(9)-bound adeninate (Ad-) was chosen as the guest of p-sulfonatothiacalix[4]arene (STCA) to study the inclusion complex formation at wide range of pH 2–10. It was shown by 1H, NOE NMR methods and pH-metric procedure, that pH-driven variation of the inclusion mode of 1 + into calixarene cavity is the result of the protonation of 1 + via adeninate moiety. |
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| Keywords: | Co (III) bis-ethylendiaminate-adeninate inclusion complex NMR 1H spectroscopy outer-sphere coordination p-Sulfonatothiacalix[4]arene |
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