2,2′-Bipyridyl as a Redox-Active Borylene Abstraction Agent
2020
2,2′-Bipyridyl is shown to
spontaneously abstract a borylene
fragment (R–B:) from various hypovalent boron compounds. This
process is a redox reaction in which the bipyridine is reduced and
becomes a dianionic substituent bound to boron through its two nitrogen
atoms. Various transition metal–borylene complexes and diboranes,
as a well as a diborene, take part in this reaction. In the latter
case, our results show an intriguing example of the homolytic cleavage
of a BB double bond.
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