Facile syntheses of tris(trifluoromethyl) phosphine and difluorotris(trifluoromethyl)phosphorane
Tris(trifluorornethyl)phosphine is easily available in high yield using the three component system P(NEt)2)3/CF3Br/(PhO)3P in HMPA. Addition of chlorine and fluorination with zinc difluoride yield difluorotris(trifluoromethyl)phosphorane.
Goerg, Michaela,Roeschenthalera, Gerd-Volker,Kolomeitsev, Alexander A.
Oxygen reacts with tris(trifluoromethyl)phosphine by a chain reaction involving the trifluoromethyl radical and its autoxidation. With thermal quenching, tris(trifluoromethyl) phosphate and bis(trifluoromethyl)fluorophosphine oxide are formed. Under conditions of spontaneous ignition the latter compound delivers CF2, a powerful reducing agent.
Mahler, Walter
p. 352 - 354
(2007/10/05)
Inorganic chemistry of fluorocarbenes. 1. Reactions of tetrafluoroethylidene with fluorine-containing phosphines
The interactions of tetrafluoroethylidene with three fluorine-containing phosphines have been investigated. The source of the carbene is the pyrolytic decomposition of C2F5SiF3 at 200°C. The reaction of CF3CF with PF3 generates CF2=CFPF4 and PF5; reaction with (CF3)3P leads to (CF3)2PCF(CF3)2; and reaction with (CF3)2PCF(CF3)2 produces the fluorocarbon (CF3)2CFCF(CF3)2. The possibility that the vinylphosphorane product of the PF3 reaction results from fluorine-transfer rearrangement of C2F5PF2 as an intermediate product was discredited by a demonstration that C2F5PF2 is thermally stable under the reaction conditions. Other mechanistic pathways are discussed.