Fluck, EkkehardNeumüller, BernhardHeckmann, GernotBraun, RolandBecker, GerdKnebl, RobertRiffel, Heinz2010-11-152016-03-312010-11-152016-03-311987340422947http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-58072http://elib.uni-stuttgart.de/handle/11682/1295http://dx.doi.org/10.18419/opus-1278Alkyl- and aryldiaminodifluorophosphoranes 1 can easily be obtained by fluorination of alkyl- and aryldiaminophosphanes with sulfur tetrafluoride, SF4 1. Peralkylated alkyldiaminodifluorophosphoranes react with one mole of n-butyllithium to form P-fluoro-ylides, a class of compounds which had not been described previously. Methylbis(dimethylamino)difluorophosphorane 2, e.g., reacts with butyllithium to give methylenebis(dimethylamino)fluorophosphorane 3, a colorless liquid, b.p. 42 °C (10 Torr)2: For P-chloro-ylides such as (t-C4H9)2PCI=CHSi(CH3)3, the chloro ligand is substituted by the alkyl group upon reaction with methyl-or n-butyllithium3,4; however, P-fluoro-ylides behave in a different way. If 2 is reacted with two moles of butyllithium, the main product is the crystalline, colorless 1,1,3,3-tetrakis(dimethylamino)-1δ 5, 3δ 5-diphosphete or 1,1,3,3-tetrakis(dimethylamino)-δ 5, 3δ 5-diphosphacyclobutadiene 4 (chemical shift σ(P) = 48.9 ppm)5.eninfo:eu-repo/semantics/openAccessAlkylphosphane540article2014-09-11