title: Crystal structure of 7-hy-droxy-8-[(4-methyl-piperazin-1-yl)meth-yl]-2H-chromen-2-one.
abstract: In the title compound, C15H18N2O3, the coumarin ring is essentially planar, with an r.m.s. deviation of 0.012 Å. An intra-molecular O-H⋯N hydrogen bond forms anS(6) ring motif. The piperazine ring adopts a chair conformation. In the crystal, a C-H⋯O hydrogen bond generates aC(4) chain motif running along thecaxis. The chain structure is stabilized by a C-H⋯π inter-action. The chains are linked by π-π inter-actions [centroid-centroid distance of 3.5745 (11) Å], forming a sheet structure parallel to thebcplane.
authors.affiliation: Division of Natural Sciences, Osaka Kyoiku University, Kashiwara, Osaka 582-8582, Japan.
authors.forename: Koji
authors.initials: K
authors.lastname: Kubono
authors.affiliation: Division of Natural Sciences, Osaka Kyoiku University, Kashiwara, Osaka 582-8582, Japan.
authors.forename: Ryuma
authors.initials: R
authors.lastname: Kise
authors.affiliation: Osaka Municipal Technical Research Institute, Osaka 536-8553, Japan.
authors.forename: Yukiyasu
authors.initials: Y
authors.lastname: Kashiwagi
authors.affiliation: Division of Natural Sciences, Osaka Kyoiku University, Kashiwara, Osaka 582-8582, Japan.
authors.forename: Keita
authors.initials: K
authors.lastname: Tani
authors.affiliation: Division of Natural Sciences, Osaka Kyoiku University, Kashiwara, Osaka 582-8582, Japan.
authors.forename: Kunihiko
authors.initials: K
authors.lastname: Yokoi
keywords: coumarin; crystal structure; hydrogen bonding; piperazine; π–π inter­actions