title: Ethyl 2-(1,2,3,4-tetrahydro-spiro-[carba-zole-3,2'-[1,3]dioxolan]-9-yl)acetate.
abstract: In the title compound, C(18)H(21)NO(4), the hydrogenated six-membered ring of the carbazole unit adopts a half-chair conformation. The dioxolane ring and ethyl-acetate substituent point to opposite sides of the carbazole plane. The ethyl-acetate substituent adopts an essentially fully extended conformation, and its mean plane forms a dihedral angle of 83.8 (1)° with respect to the carbazole mean plane. The mol-ecules are arranged into stacks in which the carbazole planes form a dihedral angle of 4.4 (1)° and have an approximate inter-planar separation of 3.6 Å.
authors.affiliation: University of Southern Denmark, Department of Physics and Chemistry, Campusvej 55, 5230 Odense M, Denmark.
authors.forename: Philipp M G
authors.initials: PM
authors.lastname: Löffler
authors.forename: Trond
authors.initials: T
authors.lastname: Ulven
authors.forename: Andrew D
authors.initials: AD
authors.lastname: Bond