Ontology highlight
ABSTRACT:
SUBMITTER: Abou A
PROVIDER: S-EPMC3275277 | biostudies-literature | 2012 Feb
REPOSITORIES: biostudies-literature
Acta crystallographica. Section E, Structure reports online 20120131 Pt 2
In the title mol-ecule, C(20)H(18)O(4), the three methyl groups of the tert-butyl substituent show rotational disorder. Each methyl group is split over three positions, with refined site-occupation factors of 0.711 (4), 0.146 (3) and 0.144 (4). The benzene ring of the benzoate group is oriented at a dihedral angle of 60.70 (7)° with respect to the planar chromene ring [maximum deviation = 0.046 (2) Å]. The crystal structure features centrosymmetric R(2) (2)(8) dimers formed via C-H⋯O inter-actio ...[more]