title: Three-Fold Scholl-Type Cycloheptatriene Ring Formation around a Tribenzotriquinacene Core: Toward Warped Graphenes.
abstract: A nonplanar polycyclic aromatic compound 6 bearing a tribenzotriquinacene (TBTQ) core merged with an o,p,o,p,o,p-hexaphenylene belt was prepared and characterized by NMR spectroscopy and X-ray crystallography. The key synthesis step involves three Scholl-type cycloheptatriene ring formation steps of the 1,4,8-tris(3',4'-dimethoxyphenyl)-TBTQ derivative 5. The bridging of each of the three TBTQ bays by 1,2-phenylene units in compound 6 gives rise to an unusual wizard hat shaped structure, which represents a promising key intermediate for the construction of nonplanar nanographene molecules bearing a TBTQ core.
authors.affiliation: Department of Chemistry, Institute of Molecular Functional Materials, and The Center of Novel Functional Molecules, The Chinese University of Hong Kong , Shatin, Hong Kong.
authors.forename: Ho-Wang
authors.initials: HW
authors.lastname: Ip
authors.affiliation: Department of Chemistry, Institute of Molecular Functional Materials, and The Center of Novel Functional Molecules, The Chinese University of Hong Kong , Shatin, Hong Kong.
authors.forename: Chun-Fai
authors.initials: CF
authors.lastname: Ng
authors.affiliation: Department of Chemistry, Institute of Molecular Functional Materials, and The Center of Novel Functional Molecules, The Chinese University of Hong Kong , Shatin, Hong Kong.
authors.forename: Hak-Fun
authors.initials: HF
authors.lastname: Chow
authors.affiliation: Department of Chemistry and Center for Molecular Materials (CM2), Bielefeld University , 33615 Bielefeld, Germany.
authors.forename: Dietmar
authors.initials: D
authors.lastname: Kuck