Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 126, Issue -, Pages -Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2021.107019
Keywords
Ugi?s amine; H-phosphinic acid; Zwitterionic form; Electrochemical properties
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Funding
- Russian Science Foundation [197300297]
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The Ugi amine H-phosphinic acid was synthesized and its zwitterionic form was clearly demonstrated. Unlike other monophosphinates, it does not show double oxidation peaks, indicating a single form in solution. The oxidative potential of this compound is more positive due to its complete existence in the zwitterionic form in solution.
Ugi amine H-phosphinic acid was prepared by hydrolysis of 1-dichlorophosphanyl-2-N,N-dimethylaminomethylferrocene (1). The formation of the zwitterionic form of Ugi amine H-phosphinic acid (2) was clearly demonstrated by NMR, X-ray single crystal diffraction studies and electrochemical measurements. It was shown for the first time that Ugi amine H-phosphinic acid, unlike other monophosphinates reported in the literature, does not show double oxidation peaks, which clearly indicates the presence of a single form in solution. It is shown that the oxidative potential of 2 is more positive than that of other monophosphinates, since in solution the substance exists completely in the zwitterionic form.
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