Synthesis and Characterization of Tetrakis(pentafluoroethyl)aluminate.

While perfluorinated aryl, aryloxy and alkoxy aluminum species are well-established as weakly coordinating anions (WCAs), corresponding perfluoroalkyl aluminum derivatives are virtually unknown. Reaction of Si(C F ) CH with Li[AlH ] afforded the tetrakis(pentafluoroethyl)aluminate, [Al(C F ) ] . Several salts of the [Al(C F ) ] ion were synthesized and characterized by NMR spectroscopic methods, mass spectrometry, X-ray diffraction studies and elemental analysis.