Complete deconstruction of SF₆ by an aluminium(i) compound

Abstract

The room-temperature activation of SF6, a potent greenhouse gas, is reported using a monovalent aluminium(I) reagent to form well-defined aluminium(III) fluoride and aluminium(III) sulfide products. New reactions have been developed...

Solvent-free photochemical decomposition of sulfur hexafluoride by phosphines: formation of difluorophosphoranes as versatile fluorination reagents

“…48 Lauric acid was selected as model substrate to optimize the reaction conditions (Table 1). The progress of the deoxyfluorination was monitored by 31 P and 19 F NMR spectroscopy, confirming the formation of Ph 3 PO, lauroyl fluoride and HF/ FHF − . We suspect that the liberation of HF during the reaction is the reason why three equivalents of difluorophosphorane (1 eq.…”

“…Scheme 3 Photochemical reaction of SF 6 with an alkylphosphine using photosensitizers. a As determined by quantitative 19 F NMR spectroscopy using α,α,α-trifluorotoluene as internal standard.…”

Repurposing of F-gases: challenges and opportunities in fluorine chemistry

“…We developed a transition metal free reaction that rapidly reduces SF 6 under mild conditions using a highly nucleophilic aluminium( i ) complex, 3. 263 The reaction produces two known, well-defined aluminium( iii ) fluoride and sulfide complexes, 4 and 5 ( Scheme 9 ). These two species are separable by virtue of their differing solubilities in the reaction solvent, with the sulfide species 5 forming a colourless precipitate from benzene or toluene.…”

Photochemical Activation of Sulfur Hexafluoride: A Tool for Fluorination and Pentafluorosulfanylation Reactions

“…58 The activation of SF6 by non-coordinated phenolate anions reported in 2021 by Hoge and co-workers resulted in the formation of phosphazenium pentafluorosulfanylide salts. 59 SF6 can be completely deconstructed by electrochemical reduction (Magnier et al), 60 or by an aluminium(I) compound according to Crimmins et al 61 While these thermal or electrochemical methods majorly contribute to efficient destruction of SF6, this approach is suffering from an inherent disadvantage. One strategy of activation is the reduction of the high barrier of activation by increasing the thermodynamic driving force of the reactions.…”