title: 3,3a-Dihydrocyclopenta[b]chromen-1(2H)-ones from the reaction of salicylaldehyde and 2-cyclopenten-1-one.
abstract: The two title chromene compounds, 3,3a-dihydrocyclopenta[b]chromen-1(2H)-one, C16H12O2, (I), and 2-(2-hydroxybenzylidene)-3,3a-dihydrocyclopenta[b]chromen-1(2H)-one, C19H14O3, (II), have been determined in the monoclinic space group P2(1)/n. Compound (I) is mainly stabilized by C-H...pi interactions. Compound (II) is linked into infinite one-dimensional chains with a C(3) motif via intermolecular O-H...O hydrogen bonds. The intermolecular C-H...pi and pi-pi interactions also play key roles in stabilizing the crystal packing. Two intramolecular C-H...O hydrogen bonds with S(5) motifs were detected in (II).
authors.affiliation: Institute of Molecular Science, Chemical Biology and Molecular Engineering Laboratory of Education Ministry, Shanxi University, Taiyuan, Shanxi 030006, People's Republic of China.
authors.forename: Fang Jun
authors.initials: FJ
authors.lastname: Huo
authors.forename: Cai Xia
authors.initials: CX
authors.lastname: Yin
authors.forename: Xiang Lin
authors.initials: XL
authors.lastname: Jin
authors.forename: Pin
authors.initials: P
authors.lastname: Yang
mesh_terms: D000447:Aldehydes / Q000737:chemistry*; D001578:Benzopyrans / Q000737:chemistry*; D018360:Crystallography, X-Ray; D003517:Cyclopentanes / Q000737:chemistry*; D006860:Hydrogen Bonding; D008958:Models, Molecular; D008968:Molecular Conformation
chemical_list: D000447:Aldehydes; D001578:Benzopyrans; D003517:Cyclopentanes; C013243:salicylaldehyde; C013905:cyclopentenone