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IR and NMR spectra, intramolecular hydrogen bonding and conformations of mercaptothiacalix[4]arene molecules and their para-tert-butyl-derivative

Katsyuba S.; Zvereva E.; Chernova A.; Shagidullin A.; Solovieva S.; Antipin I.; Konovalov A. (2008)

It is demonstrated that the introduction of p-tert-butyl groups dramatically influences the conformational behaviour of the mercaptothiacalix[4] arene molecules. Quantum-chemical computations in combination with IR and NMR ...
IR and NMR spectra, intramolecular hydrogen bonding and conformations of para-tert-butyl-aminothiacalix[4]arene in solid state and chloroform solution

Zvereva E.; Katsyuba S.; Vandyukov A.; Chernova A.; Kovalenko V.; Solovieva S.; Antipin I.; Konovalov A. (2010)

It is demonstrated that dissolution of aminothiacalix[4]arene in chloroform results in transformation of 1,3-alternate conformation, adopted in single-crystal and bulk polycrystalline solids, to the pinched-cone form. This ...
Regioselective alkylation of the lower rim of p-tert-butylthiacalix[4]arene with n-(p-nitrophenyl)-α-bromoacetamide

Stoikov I.; Ibragimova D.; Shestakova N.; Krivolapov D.; Litvinov I.; Antipin I.; Konovalov A.; Zharov I. (2009)

The preparation of partially substituted thiacalix[4]arenes 2-6 has been accomplished by conducting the reaction of the thiacalixarene 1 with N-(p-nitrophenyl)-α-bromoacetamide in acetone or acetonitrile in the presence ...
Some applications of vibrational spectroscopy in conformational analysis

Fishman A.; Remizov A.; Stolov A. (1999)

We report some vibrational spectroscopic approaches to studying conformational equilibria and kinetics, which were developed in recent years: (i) investigation of relative band dichroism in polarized IR spectra of crystals; ...
The synthesis of tetracarbonyl derivatives of thiacalix[4]arene in different conformations and their complexation properties towards alkali metal ions

Stoikov I.; Omran O.; Solovieva S.; Latypov S.; Enikeev K.; Gubaidullin A.; Antipin I.; Konovalov A. (2003)

The three conformations of 5,11,17,23-tetra-tert-butyl-25,26,27,28-tetrakis[(benzoyl)methoxy]-2,8,14, 20-tetrathiacalix[4]arene 1: cone, partial cone and 1,3-alternate, were prepared by the treatment of 5,11,17,23-tetra- ...

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Browsing by Subject "Conformations"

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