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A Phosphinine‐derived 1‐Phospha‐7‐bora‐norbornadiene: Frustrated Lewis Pair Type Activation of Triple Bonds

Leitl, J. ; Jupp, A. R. ; Habraken, E. R. M. ; Streitferdt, V. ; Coburger, P. ; Scott, D. J. ; Gschwind, Ruth M. ; Müller, C. ; Slootweg, J. C. ; Wolf, Robert



Abstract

Salt metathesis of 2,4,6‐triphosphacyclohexadienyl lithium and chlorobis(pentafluorophenyl)borane affords a 1‐phospha‐7‐bora‐norbornadiene derivative 2 . The C≡N triple bonds of nitriles insert into the P−B bond of 2 with concomitant C−B bond cleavage, while the C≡C bonds of phenylacetylenes react with 2 to form λ 4 ‐phosphabarrelenes. Even though 2 must formally be regarded as a classical Lewis ...

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