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Pentafluoroethylaluminates: A Combined Synthetic, Spectroscopic, and Structural Study.

Lisa A BischoffJarno RieferRaphael WirthensohnTobias BischofRüdiger BertermannNikolai V Ignat'evMaik Finze
Published in: Chemistry (Weinheim an der Bergstrasse, Germany) (2020)
Salts of the tetrakis(pentafluoroethyl)aluminate anion [Al(C2 F5 )4 ]- were obtained from AlCl3 and LiC2 F5 . They were isolated with different counter-cations and characterized by NMR and vibrational spectroscopy and mass spectrometry. Degradation of the [Al(C2 F5 )4 ]- ion was found to proceed via 1,2-fluorine shifts and stepwise loss of CF(CF3 ) under formation of [(C2 F5 )4-n AlFn ]- (n=1-4) as assessed by NMR spectroscopy and mass spectrometry and supported by results of DFT calculations. In addition, the [(C2 F5 )AlF3 ]- ion was structurally characterized.
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