title: Dimerization of pyramidalized 3,4,8,9-tetramethyltetracyclo [4.4.0.0(3,9).0(4,8)]dec-1(6)-ene to a hydrocarbon featuring four cyclohexane rings in boat conformations.
abstract: The synthesis, chemical trapping, and dimerization of a highly pyramidalized alkene is reported. Its dimer is a unique nonacycle featuring three planar cyclobutane rings, four cyclopentane rings, and four cyclohexane rings in boat conformations. The X-ray diffraction analysis showed a H-H distance between the flagpole hydrogen atoms of 1.999 Å and a separation of 2.619 Å between the two flagpole carbon atoms. The three cyclobutane rings of the dimer were thermally stable.
authors.affiliation: Laboratori de Química Farmacèutica (Unitat Associada al CSIC), Facultat de Farmàcia, and Institute of Biomedicine (IBUB), Universitat de Barcelona, Av. Joan XXIII, s/n, 08028 Barcelona (Spain) http://www.ub.edu/farmaco/ca/farmaceutica/recerca/novel_polycyclic_compounds_with_biological_activity/8/
authors.forename: Matias
authors.initials: M
authors.lastname: Rey-Carrizo
authors.forename: Marta
authors.initials: M
authors.lastname: Barniol-Xicota
authors.forename: Mercè
authors.initials: M
authors.lastname: Font-Bardia
authors.forename: Santiago
authors.initials: S
authors.lastname: Vázquez
mesh_terms: D003510:Cyclohexanes / Q000737:chemistry*; D019281:Dimerization; D006838:Hydrocarbons / Q000737:chemistry*; D008968:Molecular Conformation
chemical_list: D003510:Cyclohexanes; D006838:Hydrocarbons; C506365:Cyclohexane
keywords: ab initio calculations; dimerization; hydrocarbons; polycycles; strained molecules