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- ISSN: 1570-1786
- E-ISSN: 1875-6255
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Conformational Mobility Study in Mono Quinone Derivative of Calix[4]arene by Low Temperature NMR Spectroscopy
- Source: Letters in Organic Chemistry, Volume 17, Issue 2, Feb 2020, p. 101 - 106
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- 01 Feb 2020
Abstract
Calix[4]monoquinone (3) has been synthesized by oxidation of rigid cone conformation of tripropoxy calix[4]arene (2), and conformational characteristics of this molecule have been studied by means of dynamic nuclear magnetic resonance (DNMR) and HH- correlated nuclear magnetic resonance spectroscopy (HH-COSY NMR). On the basis of the data that have been obtained, free Gibbs energy of activation (ΔG#) for quinone ring interconversion process of 3 was determined 12.3±0.05 Kcal/mol by coalescence approximation method.
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