Chemistry Letters p. 603 - 604 (1998)
Update date:2022-08-11
Topics:
Tsuge, Akihiko
Araki, Tadashi
Noguchi, Yuji
Yasutake, Mikio
Moriguchi, Tetsuji
Sakata, Kazunori
Novel 1,8-bridged fluorenophanes consisting of benzene, benzoquinone, or naphthalene ring have been prepared. Their conformational properties are clarified by the NMR spectra and the X-ray analysis, especially in terms of a shielding effect on 9-protons of the fluorene unit. The dynamic structure was also examined by the variable-temperature NMR spectroscopy.
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