Boryllithium: isolation, characterization, and reactivity as a boryl anion.

@article{Segawa2006BoryllithiumIC,
  title={Boryllithium: isolation, characterization, and reactivity as a boryl anion.},
  author={Yasutomo Segawa and Makoto Yamashita and Kyoko Nozaki},
  journal={Science},
  year={2006},
  volume={314 5796},
  pages={113-5}
}
Nucleophilic, anionic boryl compounds are long-sought but elusive species. We report that reductive cleavage of the boron-bromine bond in N,N'-bis(2,6-diisopropylphenyl)-2-bromo-2,3-dihydro-1H-1,3,2-diazaborole by lithium naphthalenide afforded the corresponding boryllithium, which is isoelectronic with an N-heterocyclic carbene. The structure of the boryllithium determined by x-ray crystallography was consistent with sp(2) boron hybridization and revealed a boron-lithium bond length of 2.291… CONTINUE READING
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