2-Hy-droxy-2-trifluoro-methyl-3,4-dihydro-2H-1-benzopyran-4-one

Abstract

The heterocyclic ring in the title compound, C(10)H(7)F(3)O(3), has a half-boat conformation with the hy-droxy-bearing C atom lying 0.595 (3) Å out of the plane of the five remaining atoms (r.m.s. deviation = 0.022 Å) in the direction of the hy-droxy O atom. Linear supra-molecular chains along the a axis, sustained by O-H⋯O hydrogen bonds between the hy-droxy H and ketone O atoms, feature in the crystal packing. These chains are connected into a three-dimensional architecture by C-H⋯O and C-H⋯F contacts.

Fig. 1.

The molecular structure of (I) showing the atom-labelling scheme and displacement ellipsoids at the 50% probability level.

Fig. 2.

A view of the linear supramolecular chain along the a axis in (I) mediated by O—H···O hydrogen bonds shown as orange dashed lines.

Fig. 3.

A view in projection along the b axis of the unit-cell contents of (I). The O—H···O, C—H···O and C—H···F interactions are shown as orange, blue and purple dashed lines, respectively.