title: A Bottom-up Synthesis of Antiaromatic Expanded Phthalocyanines: Pentabenzotriazasmaragdyrins, i.e. Norcorroles of Superphthalocyanines.
abstract: The first example of an antiaromatic expanded phthalocyanine, classified as a norcorrole of a superphthalocyanine has been prepared and fully characterized. The newly developed phthalonitrile dimerization reaction was a crucial step, which allowed for the bottom-up synthesis of expanded phthalocyanines. Their structure was confirmed by single crystal X-ray diffraction analysis. The 20 π antiaromaticity of the macrocycles was suggested by optical and theoretical calculations.
authors.affiliation: Department of Chemistry, Graduate School of Science, Tohoku University , Sendai 980-8578, Japan.
authors.forename: Taniyuki
authors.initials: T
authors.lastname: Furuyama
authors.affiliation: Department of Chemistry, Graduate School of Science, Tohoku University , Sendai 980-8578, Japan.
authors.forename: Takehito
authors.initials: T
authors.lastname: Sato
authors.affiliation: Department of Chemistry, Graduate School of Science, Tohoku University , Sendai 980-8578, Japan.
authors.forename: Nagao
authors.initials: N
authors.lastname: Kobayashi