Are there single-well hydrogen bonds in pyridine–dichloroacetic acid complexes?

Charles L. Perrin; Phaneendrasai Karri

doi:10.1039/B917765E

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Chemical Communications

Issue 3, 2010

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Are there single-well hydrogen bonds in pyridine–dichloroacetic acid complexes?

Charles L. Perrin and Phaneendrasai Karri

Chem. Commun., 2010, 46, 481-483

DOI: 10.1039/B917765E
Received 28 Aug 2009, Accepted 22 Oct 2009
First published on the web 13 Nov 2009

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The ¹⁸O-induced isotope shifts in ¹³C NMR spectra of 1:1 complexes of Cl₂CHC¹⁸O₂H with a series of substituted pyridines in CD₂Cl₂ at low temperature reach a maximum when the acidities of the hydrogen-bond donors are matched, consistent with a mixture of tautomers, and with no drop that would indicate a single-well H-bond.

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Chemical Communications

Are there single-well hydrogen bonds in pyridine–dichloroacetic acid complexes?

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