Rhenium carbonyl fluorides: preparation of pentacarbonylfluoro-rhenium and preparation and chemistry of pentacarbonylfluororhenium–rhenium pentafluoride

Abstract

The rhenium carbonyl fluoride, [Re(CO)₅F], has been prepared by the reaction of [Re(CO)₅Cl] with anhydrous hydrogen fluoride, and the carbonyl fluoride adduct, [Re(CO)₅F·ReF₅], by the room-temperature fluorination of [Re₂(CO)₁₀] with xenon difluoride in Genetron 113 (1,1,2-trichlorotrifluoroethane) or anhydrous HF solvents. Partial hydrolysis of [Re(CO)₅F·ReF₅] yields [Re(CO)₆][ReF₅O]. Preliminary investigations of the reactions of [Re(CO)₅F·ReF₅] with liquid SbF₅ and with TaF₅ dissolved in HF suggest that the compounds [Re(CO)₆][Sb₂F₁₁] and [Re(CO)₅F·TaF₅] respectively are formed.