Molecular structures and reactivity of trifluoromethyltris(dialkylamino)phosphonium bromides

Article abstract of DOI:10.1016/0022-1139(94)03127-L

Hexa-alkylphosphorus triamides and trifluoromethyl bromide react to give trifluoromethyltris(dialkylamino)phosphonium bromides which were used for the trifluoromethylation of benzaldehyde and copper(I) iodide in the presence of fluoride anions with different counterions; tris(diethylamino)difluorophosphorane proved to be a masked fluoride anion donor.The structures of (1+)Br(1-) and (1+)Br(1-) have been determined by single-crystal X-ray investigations and shown to exhibit a distorted tetrahedral bond configuration with a rather long (F3)C-P bond of 1.866(9) or 1.896(6) Angstroem, respectively. - Keywords: Molecular structures; Reactivity; Trifluoromethyltris(dialkylamino)phosphonium bromides; Single-crystal X-ray determination; NMR spectroscopy