pentafluoride is an excellent catalyst for ionic polymerizations. Especially noteworthy is the PF5-catalysed polymerization of tetrahydrofuran to a very high (Mn− = 280,000) molecular weight elastomer. Phosphorus trifluoride, unlike the pentafluoride, exhibits no significant acceptor properties. However, the trifluoride does undergo a curious disproportionation, 3MF + 5PF3 → 3MPF6 + 2P, that may involve an
Structure and fluxionality in the PF<sub>6–n</sub>(CN)<sup>–</sup><sub>n</sub>and PF<sub>3</sub>Cl<sub>3–n</sub>(CN)<sup>–</sup><sub>n</sub>series
作者:Keith B. Dillon、Andrew W. G. Platt
DOI:10.1039/c39830001089
日期:——
Several new ions in the series PF6ân(CN)ân and PF3Cl3ân(CN)ân have been prepared and identified by n.m.r. spectroscopy; some species with three or more fluorine atoms present are fluxional at 307.2 K.