K. Iijima, Atsushi Ohnogi, S. Shibata
1987
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Journal
Journal of Molecular Structure
Abstract
Abstract The molecular structure of the enol form of gaseous acetylacetone has been determined from electron diffraction data. The molecular skeleton is planar but it is not symmetric. The bond distances in the ring are r g (CO) = 1.243 ± 0.002 A, r g (CO) = 1.319 ± 0.003 A, r g (CC) = 1.382 ± 0.007, r g (CC) = 1.430 ± 0.008 A, r g (OH) = 1.049 ± 0.015 A and r g (O⋯O) = 2.512 ± 0.008 A. The hydrogen atom of the internal hydrogen bond lies 0.45 ± 0.08 A out of the molecular plane with the OHO angle of 137 ± 7°.