A new synthetic route to rhenium and iodine oxide fluoride anions: The reaction between oxoanions and sulfur tetrafluoride

• Sulfur tetrafluoride is of great utility for inorganic chemistry.
• Rhenium and iodine oxide fluoride salts can be prepared using SF4 as a reagent.
• Ag[Re2O2F4] forms coordination compounds with CH3CN.

Sulfur tetrafluoride is a reagent for the one-step syntheses of [ReVIIO2F4]−, [IVOF4]−, and [IVIIO2F4]− salts. Pure Ag[ReO2F4] as well as its CH3CN coordination compounds were obtained from CH3CN solvent. The Ag[ReO2F4], [Ag(CH3CN)2][ReO2F4], and [Ag(CH3CN)4][ReO2F4] salts were characterized by Raman spectroscopy. The [Ag(CH3CN)4][ReO2F4]·2CH3CN coordination compound was characterized by single-crystal X-ray diffraction. The reaction of SF4 with KIO4 in anhydrous HF gave the known K[IO2F4] salt. The reaction of [N(CH3)4]IO3 with SF4 in CH3CN yielded the new [N(CH3)4][IOF4] salt, which was characterized by Raman spectroscopy.

The reaction of AgReO4, [N(CH3)4]IO3, and KIO4 with SF4 in an appropriate solvent yields pure Ag[ReO2F4], [N(CH3)4][IOF4], and K[IO2F4], respectively, in a single step.Figure optionsDownload as PowerPoint slide