title: Norbornane-exo-cis-2,3-diyl 1',2'-phenyl-ene orthocarbonate.
abstract: 4,7-methano-2,2'-spirobi-[1,3-benzodioxole]), C(14)H(14)O(4), is an asymmetric spiro ester of orthocarbonic acid and two diols, viz. the aromatic benzene-1,2-diol and the aliphatic vicinal norbornane-exo-cis-2,3-diol. The orthocarbonate mol-ecule is close to having non-crystallographic C(s) symmetry. The five-membered ring stemming from the aliphatic diol has an envelope conformation. C-O bonds including the spiro-C atom span an approximately 0.07 Å range, but are within 0.02 Å of the respective distances in a density functional theory calculation, i.e. the distance difference is not caused by packing forces. Accordingly, the crystal packing is characterized by weak C-H⋯O and C-H⋯π inter-actions.
authors.affiliation: Ludwig-Maximilians-Universität, Department Chemie und Biochemie, Butenandtstrasse 5-13, 81377 München, Germany.
authors.forename: Richard
authors.initials: R
authors.lastname: Betz
authors.forename: Peter
authors.initials: P
authors.lastname: Klüfers