Abstract
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(C2F5)3CH3 with Li[AlH4] afforded the tetrakis(pentafluoroethyl)aluminate, [Al(C2F5)4]−. Several salts of the [Al(C2F5)4]− ion were synthesized and characterized by NMR spectroscopic methods, mass spectrometry, X‐ray diffraction studies and elemental analysis.
Highlights
Several tetrakis(perfluoroaryl) and -(alkyl) derivatives of group 13 elements B, Al and Ga are known to date
A few perfluoropropyl aluminum species could be detected by 19F NMR spectroscopy but due to their instability they could not be isolated.[16]
The pentafluoroethyl group appears to be a promising candidate for the synthesis of the yet unknown aluminum tetrakis(perfluoroalkyls)
Summary
Several tetrakis(perfluoroaryl) and -(alkyl) derivatives of group 13 elements B, Al and Ga are known to date.
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