B[F.sub.2] complex of fluorinated dipyrrolyldiketone: A new class of efficient receptor for acetate anions

The preparation of the Beta-fluorinated derivative of the 1,3-dipyrrolyl-1,3-propanedione B[F.sub.2] complex from 3,4-difluoropyrrole and malonyl chloride, followed by treatment with B[F.sub.3].O[Et.sub.2] is presented. Results show that, despite the simple, acyclic, and neutral structure, the Beta-fluorinated derivative exhibits efficient 1:1 binding for anions in C[H.sub.2][Cl.sub.2] using the bridging CH and pyrrole NH as interaction sites.