title: Tetracyanido(difluorido)phosphates M(+) [PF2 (CN)4 ](.).
abstract: The systematic study of the reaction of M[PF6 ] salts and Me3 SiCN led to a synthetic method for the synthesis and isolation of a series of salts containing the unprecedented [PF2 (CN)4 ](-) ion in good yields. The reaction temperature, pressure, and stoichiometry were optimized. The crystal structures of M[PF2 (CN)4 ] (M=[nBu4 N](+) , Ag(+) , K(+) , Li(+) , H5 O2 (+) ) were determined. X-ray crystallography showed the exclusive formation of the cis isomer in accord with (31) P and (19) F solution NMR spectroscopy data. Starting with the K[PF2 (CN)4 ] the room temperature ionic liquid EMIm[PF2 (CN)4 ] was prepared exhibiting a rather low viscosity.
authors.affiliation: Institut für Chemie, Universität Rostock, Albert-Einstein-Strasse 3a, 18059 Rostock (Germany) http://www.schulz.chemie.uni-rostock.de/
authors.forename: Jonas
authors.initials: J
authors.lastname: Bresien
authors.forename: Stefan
authors.initials: S
authors.lastname: Ellinger
authors.forename: Jörg
authors.initials: J
authors.lastname: Harloff
authors.forename: Axel
authors.initials: A
authors.lastname: Schulz
authors.forename: Katharina
authors.initials: K
authors.lastname: Sievert
authors.forename: Alrik
authors.initials: A
authors.lastname: Stoffers
authors.forename: Christoph
authors.initials: C
authors.lastname: Täschler
authors.forename: Alexander
authors.initials: A
authors.lastname: Villinger
authors.forename: Cornelia
authors.initials: C
authors.lastname: Zur Täschler
keywords: cyanides; inorganic synthesis; ionic liquids; phosphates; structure elucidation