title: 3H-2,1-Benzoxaborole-1-spiro-4'-(5-oxa-3a-aza-4-borapyrene).
abstract: In the title compound, C(20)H(14)BNO(2), the B atom has a tetra-hedral geometry with two short B-O and two long B-C and B-N bonds, revealing a significant difference between C(ar)-O-B and C(alk-yl)-O-B bond distances. Inter-molecular Ar-H⋯O hydrogen bonds and strong π-π inter-actions (3.368 Å) between aromatic cores of neighbouring mol-ecules result in hexa-gonal channels along the crystallographic c axis, which are potentially accessible for small mol-ecules.
authors.affiliation: Department of Chemistry and Biochemistry, University of Minnesota Duluth, Duluth, MN 55812, USA.
authors.forename: Beck
authors.initials: B
authors.lastname: Robin
authors.forename: Gregg
authors.initials: G
authors.lastname: Buell
authors.forename: Paul
authors.initials: P
authors.lastname: Kiprof
authors.forename: Victor N
authors.initials: VN
authors.lastname: Nemykin