Conformational Mobility Study in Mono Quinone Derivative of Calix[4]arene by Low Temperature NMR Spectroscopy-Reference-Cited by-同舟云学术

Conformational Mobility Study in Mono Quinone Derivative of Calix[4]arene by Low Temperature NMR Spectroscopy

Published:2020-01-07 Issue:2 Volume:17 Page:101-106
ISSN:1570-1786
Container-title:Letters in Organic Chemistry
language:en
Short-container-title:LOC

Author:

Hassibi Elham¹,Ganjali Saeed Taghvaei²,Hashemi Mohamad Mahmoodi²,Zadmard Reza³,Dehaghi Shahram Moradi²

Affiliation:

1. Department of Chemistry, Science and Research Branch, Islamic Azad University, Tehran, Iran

2. Department of Chemistry, Islamic Azad University North Tehran Branch, Tehran, Iran

3. Chemistry and Chemical Engineering Research Center of Iran, Tehran, Iran

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.

Publisher

Bentham Science Publishers Ltd.

Subject

Organic Chemistry,Biochemistry

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