Enol-imine/keto-amine tautomerism of (E)-4-[(2-hydroxybenzylidene)amino]phenyl benzenesulfonate
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منابع مشابه
Keto - Enol and Imine - Enamine Tautomerism of 2 - , 3 - and 4 - Phenacylpyridines
Equilibrium constants for keto-enol tautomerisation and migration of hydrogen from carbon to nitrogen to form enamine or zwitterion tautomers have been measured for 2-, 3and 4phenacylpyridines (PyCH,COPh) in aqueous solution at 25 "C. Relative tautomeric stabilities fall in the order ketoimine > enamine > enol and (for the 3-isomer) enol > zwitterion. Values of pKT, (-log KT) where KT = [enamin...
متن کاملProbing keto-enol tautomerism using photoelectron spectroscopy.
We theoretically investigate the mechanism of tautomerism in the gas-phase acetylacetone molecule. The minimum energy path between the enolone and diketo forms has been computed using the Nudged-Elastic Band (NEB) method within the density-functional theory (DFT) using the projector augmented-wave method and generalized gradient approximation in Perdew-Wang (PW91) parametrization. The lowest tr...
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Ultraviolet and infrared absorption spectroscopy, in aqueous and non-aqueous media, have been employed to study the tautomerism of 9-substituted isoguanines, including the nucleoside isoguanosine. With the aid of a series of model compounds, it was shown that 9-substituted isoguanines, and isoguanosine, in aqueous medium are predominantly in the form N (1) H, 2-keto-6-amino. In dioxane solution...
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The dialkyl 2,6-dialkylsubstituted 4-piperidone-3,5-dicarboxylates were synthesized by a Mannich procedure. Depending on the substitution at the nitrogen keto-enol-tautomerism and a configurational isomerism at C 2 is observed. The structure o f the N-substituted piperidone 24 E (C 18H29N 0 5) has been determined by X-ray analysis: it is characterized by an enol structure o f the /?-ketoester a...
متن کاملDimethyl[(E)-(2-nitromethylidene-1,3-dithiolan-4-yl)methyl]amine
In the title compound, C(7)H(12)N(2)O(2)S(2), the conformation of the dithia-cyclo-pentane ring is a half-chair, with a total puckering amplitude Q(T) = 0.473 (5) Å. Inter-molecular C-H⋯N and C-H⋯O inter-actions help to establish the packing.
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ژورنال
عنوان ژورنال: Acta Crystallographica Section A Foundations and Advances
سال: 2016
ISSN: 2053-2733
DOI: 10.1107/s2053273316093876