title: Twinning by merohedry in cyclohexanone oxime: a revised structure.
abstract: The crystal structure of cyclohexanone oxime, C(6)H(11)NO, was reported as severely disordered in the trigonal non-centrosymmetric space group P3 [Olivato, Ribeiro, Zukerman-Schpector & Bombieri (2001). Acta Cryst. B57, 705-713]. Re-investigation of the crystal structure as twinned by merohedry in the trigonal centrosymmetric space group P-3, with a twofold rotation about [001] as twin law, resulted in a well ordered structure and low R values. The asymmetric unit contains three independent molecules, existing as a hydrogen-bonded trimer, having an R(3)(3)(9) graph set.
authors.affiliation: Bijvoet Centre for Biomolecular Research, Department of Crystal and Structural Chemistry, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands. m.lutz@chem.uu.nl
authors.forename: Martin
authors.initials: M
authors.lastname: Lutz
authors.forename: Anthony L
authors.initials: AL
authors.lastname: Spek
authors.forename: Reza
authors.initials: R
authors.lastname: Dabirian
authors.forename: Cornelis A
authors.initials: CA
authors.lastname: van Walree
authors.forename: Leonardus W
authors.initials: LW
authors.lastname: Jenneskens