V. Syakaev, S. Podyachev, B. I. Buzykin
May 8, 2006
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Journal
Journal of Molecular Structure
Abstract
Abstract The conformations of 4- tert -butylphenoxyacetylhydrazones have been investigated by different NMR methods. It was shown, that existence of the rotamers is the result of nitrogen–carbonyl bond rotation. E / Z isomerization relative to the C N double bond have been found only for pyridin-2-carbaldehyde 4- tert -butylphenoxyacetylhydrazone. Solvent effects are described with regard to the role of intra- and intermolecular hydrogen bonds. The barriers of rotation were determined by NMR-measurements at various temperatures and line shape analysis.