Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 55, Issue 41, Pages 12827-12831Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201607995
Keywords
boron; boryllithium; diphosphenes; main group chemistry; substituent effects
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Funding
- JSPS [2408, JP24109012]
- MEXT [26288019]
- The Science Research Promotion Fund
- Asahi Glass Foundation
- Grants-in-Aid for Scientific Research [26288019, 15H00762] Funding Source: KAKEN
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A boryl-substituted diphosphene was synthesized through the nucleophilic borylation of PCl3 with a borylzinc reagent, followed by a reduction with Mg. A combined analysis of the resulting diboryldiphosphene by single-crystal X-ray diffraction, DFT calculations, and UV/Vis spectroscopy revealed a sigma-electron-donating effect for the boryl substituent that was slightly weaker than that of the 2,4,6-tri-tert-butylphenyl (Mes*) ligand. The reaction of this diboryldiphosphene with (BuLi)-Bu-n afforded a boryl-substituted phosphinophosphide that was, in comparison with the thermally unstable Mes*-substituted diaryldiphosphene, stabilized by a -electron-accepting effect of the boryl substituent.
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