Chemie der Phosphorfluoride. XXXIX. Synthese und Untersuchung der Temperaturabhängigkeit der kernmagnetischen Resonanzspektren von Hexafluorisopropylideniminofluorphosphoranen und Fluorphosphin-Bis(Trifluormethyl)hexafluorisopropylideniminomethylimiden

Chemistry of Phosphorus Fluorides. XXXIX. Synthesis and Investigation of the Dependence of Temperature of the NMR Spectra of Hexafluoroisopropylidence Iminofluorophoranes and Fluorophosphin-Bis(Trifluormethy)hexafluroisopropylidene Imnomethylimides. The title compounds were obtained by the reaction of the lithium salt of hexafluoroisopropylimine with fluorophosphoranes, R_nPF_5?n (n = 0, 1; R = hydrocarbon group). ¹⁹F variable temperature n.m.r. spectra show intermediate rate of intramolecular exchange at phosphorus but apparent fast “isomerisation” at nitrogen. The fluorophosphine imides, on the other hand, show intermediate rates of “isomerisation” at nitrogen in the hexafluoroisopropylidene moiety.