The idea of transforming a classical arene, by “bridging,” into a [4n+2]annulene has been further extended to the phenanthrenes. The spectroscopic data and structural parameters for the title compound 1 reveal it to be a borderline case, with respect to its π‐electron structure, for an aromatic molecule.
der Organolutetium-Phosphor-Bi!dungen (erstmals gemessen) betragen 2.782 und 2.813 A.[**I Diese Arbeit wurde von der Deutschen ForschungsgemeinschafI gef6r-Angew. Chem. 98 (1986) Nr. 8 0 VCH Verlagsgeselhchaft mbH. D-6940 Weinheim. 1986 0044-8249/86/08M-0729 S 02.50/0
The idea of transforming a classical arene, by “bridging,” into a [4n+2]annulene has been further extended to the phenanthrenes. The spectroscopic data and structural parameters for the title compound 1 reveal it to be a borderline case, with respect to its π‐electron structure, for an aromatic molecule.
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