Dis-assembly of a Benzylic CF<sub>3</sub> Group Mediated
by a Niobium(III) Imido Complex
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Abstract
All
three C–F bonds in CF<sub>3</sub>-substituted arenes
are activated by a niobium imido complex, driven by the formation
of strong Nb–F bonds. The mechanism of this transformation
was studied by NMR spectroscopy, which revealed the involvement of
Nb(III). Attempts to extend this chemistry to nonaromatic CF<sub>3</sub> groups led to intramolecular reactivity