β-Diketone interactions. Part 6. X-Ray molecular structure of 3-(4-methoxyphenyl)pentane-2,4-dione, a β-diketone enol tautomer with a very strong hydrogen bond
Abstract
The title compound, C12H14O3, exists only as the enol tautomer in CDCl3 solution and in the solid state. Its X-ray crystal structure reveals a near symmetrical enol ring in which the R (O ⋯ O)= 2.449 Å indicates a very strong hydrogen bond. I.r. and n.m.r. [Δδ(H,D)] data support this result.