Work

Protonated decafluorobenzophenone and the decafluorobenzophenone–arsenic pentafluoride adduct

Year: 2025

Type: article

Abstract: The reaction of decafluorobenzophenone [perfluorobenzophenone, (C6F5)2CO] with AsF5 in anhydrous HF yields the protonated salt [bis(2,3,4,5,6-pentafluorophenyl)methylidene]oxidanium hexafluoridoarsenate, (C6F5)2COH+[AsF6]−, whereas its reaction with AsF5 in SO2 affords the Lewis acid–base adduct decafluorobenzophenone–arsenic pentafluoride, (C6F5)2CO·AsF5. In both compounds, the decafluorobenzophenone moiety exhibits an elongated C=O bond [1.274 (2) and 1.2526 (15) Å in the salt and adduct, respectively]. The crystal structure of (C6F5)2COH+[AsF6]− features a short O—H...F hydrogen bond between the cation and the anion, and the crystal structure of (C6F5)2CO·AsF5 represents a rare example of a ketone coordinated to the strong Lewis acid AsF5.

Source: Acta Crystallographica Section C Structural Chemistry

DOI: 10.1107/s2053229625007697

Authors: Erik Uran, Matic Lozinšek

Institutions: Jožef Stefan Institute, Jožef Stefan International Postgraduate School

Language: English

Topic: Inorganic Fluorides and Related Compounds

Subfield: Inorganic Chemistry

Field: Chemistry

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,950

Funders: European Commission, H2020 European Research Council