Synthesis and structure elucidation of bromination products from dibromohomobenzonorbornadienes: high temperature bromination--part 17

Magnetic Resonance in Chemistry : MRC
Cavit KazazMetin Balci

Abstract

The electrophilic addition of bromine to dibromohomobenzonorbornadiene derivatives at -45 +/- 5 degrees C led to the formation of the rearranged and non-rearranged tetrabromides in a ratio of 6:4. However, high-temperature bromination of the same system in CCl4 at 77 degrees C produced only non-rearranged products. The formation mechanism of the isomers and the role of the substituent on the rearrangement is discussed. The structure elucidation of the isomeric tetrabromides was achieved from NMR spectral data. The agreement between the calculated dihedral angles and the measured coupling constants is especially excellent. The gamma-gauche effect is discussed.

References

Nov 15, 1996·The Journal of Organic Chemistry·Ahmet TutarMetin Balci

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Citations

Jul 9, 2016·Magnetic Resonance in Chemistry : MRC·Gabriela da Costa Resende, Elson Santiago Alvarenga
Sep 4, 2008·Dalton Transactions : an International Journal of Inorganic Chemistry·Manoja K SamantarayPrasenjit Ghosh

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