title: Crystal structure of 3-hy-droxy-methyl-1,2,3,4-tetra-hydro-isoquinolin-1-one.
abstract: In the title compound, C10H11NO2, two independent but virtually superimposable mol-ecules, A and B, comprise the asymmetric unit. The heterocyclic ring in each mol-ecule has a screw-boat conformation, and the methyl-hydroxyl group occupies a position to one side of this ring with N-C-C-O torsion angles of -55.30 (15) (mol-ecule A) and -55.94 (16)° (mol-ecule B). In the crystal, O-H⋯O and N-H⋯O hydrogen bonding leads to 11-membered {⋯HNCO⋯HO⋯HNC2O} heterosynthons, involving three different mol-ecules, which are edge-shared to generate a supra-molecular chain along the a axis. Inter-actions of the type C-H⋯O provide additional stability to the chains, and link these into a three-dimensional architecture.
authors.affiliation: Departmento de Física, Universidade Federal de São Carlos, 13565-905 São Carlos, SP, Brazil.
authors.forename: Ignez
authors.initials: I
authors.lastname: Caracelli
authors.affiliation: Departmento de Química, Universidade Federal de São Carlos, 13565-905 São Carlos, SP, Brazil.
authors.forename: Camila Lury
authors.initials: CL
authors.lastname: Hino
authors.affiliation: Departmento de Química, Universidade Federal de São Carlos, 13565-905 São Carlos, SP, Brazil.
authors.forename: Julio
authors.initials: J
authors.lastname: Zukerman-Schpector
authors.affiliation: Escola de Engenharia de Lorena - EEL, Universidade São Paulo, SP, Brazil.
authors.forename: Francisco Carlos
authors.initials: FC
authors.lastname: Biaggio
authors.affiliation: Department of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia.
authors.forename: Edward R T
authors.initials: ER
authors.lastname: Tiekink
keywords: conformation; crystal structure; hydrogen bonding