title: Dibenzo[a,o]phenanthro[3,4-s]pycene, a configurationally stable double helicene: synthesis and determination of its conformation by NMR and GIAO calculations.
abstract: [reaction: see text] A double helicene formed by a pentahelicene and a heptahelicene with two rings in common was obtained by palladium-catalyzed cyclotrimerization of 3,4-didehydrophenanthrene and was characterized conformationally by NMR and GIAO calculations.
authors.affiliation: Departamento de Química Orgánica y Unidad Asociada al CSIC, Universidad de Santiago, 15782 Santiago de Compostela, Spain.
authors.forename: Diego
authors.initials: D
authors.lastname: Peña
authors.forename: Agustín
authors.initials: A
authors.lastname: Cobas
authors.forename: Dolores
authors.initials: D
authors.lastname: Pérez
authors.forename: Enrique
authors.initials: E
authors.lastname: Guitián
authors.forename: Luis
authors.initials: L
authors.lastname: Castedo