title: 2H-Chromen-4(3H)-one.
abstract: In the title compound, C(9)H(8)O(2), a benzo-annulated heterocyclic ketone, the non-aromatic six-membered ring adopts an E(2) conformation. In the crystal, C-H⋯O contacts connect the mol-ecules into double sheets perpendicular to the crystallographic a axis. The centroid-centroid distance for two π-systems is 3.7699 (6) Å.
authors.affiliation: Nelson Mandela Metropolitan University, Summerstrand Campus, Department of Chemistry, University Way, Summerstrand, PO Box 77000, Port Elizabeth 6031, South Africa.
authors.forename: Richard
authors.initials: R
authors.lastname: Betz
authors.forename: Cedric
authors.initials: C
authors.lastname: McCleland
authors.forename: Harold
authors.initials: H
authors.lastname: Marchand