Structural effects in ion pairs from 1, 3-diarylbenzo [c] furans and alkali metals: an electron paramagnetic resonance and ENDOR study

MLTMB Franco, MCRLR Lazana…

Index: Franco, M. Luisa T. M. B.; Lazana, M. Celina R. L. R.; Herold, Bernardo J. Journal of the Chemical Society, Faraday Transactions, 1991 , vol. 87, # 12 p. 1837 - 1842

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Abstract

The radical anions of 1, 3-diarylbenzo [c] furans (1–4) obtained by reduction with alkali metals have been studied by EPR, ENDOR and TRIPLE resonance. For 1˙–and 2˙–, the inequivalence of both ortho hydrogens of each aryl substituent was established, and a small dihedral angle between the benzo [c] furan system and each aryl ring. For 3˙–and 4˙–, the four ortho methyl groups of the aryl substituents in positions 1 and 3 were found to be ...