title: Perillartine.
abstract: THE CHIRAL TITLE COMPOUND [SYSTEMATIC NAME: 4-(1-methyl-vinyl)cyclo-hexene-1-carbaldehyde oxime], C(10)H(15)NO, crystallizes with two mol-ecules in the asymmetric unit, one of which shows disorder of its propenyl substituent over two sets of sites in a 50:50 ratio. In both mol-ecules, the six-membered carbaldehyde oxime ring adopts an approximate envelope conformation in which the C atom bearing the propenyl substituent represents the flap position. In both mol-ecules, the plane passing through the propenyl substituent is nearly perpendicular to the mean plane of the six-membered ring [dihedral angles = 84.6 (6) and 87.4 (3)°]. In the crystal, the two independent mol-ecules are linked by a pair O-H⋯N hydrogen bonds across a pseudo-inversion centre, generating a dimer. The unit cell of the known racemate of the title compound is similar to the cell found here, but with space group P.
authors.forename: Xian-You
authors.initials: XY
authors.lastname: Yuan
authors.forename: Min
authors.initials: M
authors.lastname: Zhang
authors.forename: Seik Weng
authors.initials: SW
authors.lastname: Ng