Add time:07/31/2019         Source:sciencedirect.com

The preparation and tautomerism of 3,4-dimethyl-isoxazolin-5-one has been studied. A comparison of the IR and UV spectra as well as of the dipole moment of this compound with those of the three possible methyl derivatives establishes that the 4-H tautomeric form predominates in non-polar solvents, whereas the 2-H form predominates in dioxan and in hydroxylic solvents.

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