title: 1,5-Bis(2-formyl-phen-oxy)-3-oxapenta-ne.
abstract: In the title mol-ecule, C(18)H(18)O(5), the two aromatic rings are connected by a flexible 3-oxapentane chain. The mol-ecule has a crystallographic twofold rotation axis (C(2)) passing through the central O atom. An intra-molecular C-H⋯O hydrogen bond is observed in the solid state.
authors.affiliation: Instituto de Química, Universidade Federal do Rio de Janeiro, Caixa Postal 68563, 21949-900 Rio de Janeiro, RJ, Brazil.
authors.forename: Nívea C F
authors.initials: NC
authors.lastname: Dionysio
authors.forename: Jairo
authors.initials: J
authors.lastname: Bordinhão
authors.forename: Lorenzo
authors.initials: L
authors.lastname: do Canto Visentin
authors.forename: Célia Machado
authors.initials: CM
authors.lastname: Ronconi