Trifluoromethyl-substituted fluorophosphates and fluoroarsenates

Abstract
Synthetic routes have been developed to salts containing the anions [CF3PF5], [(CF3)2PF4], [(CF3)3PF3], [(CF3)2AsF4], and [(CF3)3AsF3]. These are isolated as stable solids with Cs+, or sometimes Ag+, as the cation. Their 19F n.m.r. spectra are discussed, and it is suggested that the bis- and tris-(trifluoromethyl)-substituted fluorophosphates have a trans configuration.Trimethyltrifluoromethyltin, (CH3)3SnCF3, forms 1:1 complexes with PF5, (CF3)2PF3, and (CF3)3PF2. It is suggested that transfer of a trifluoromethyl group as CF3 has occurred here, leading to the formation of trimethyltin derivatives of the trifluoromethyl-substituted fluorophosphates.

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