Beiträge zur Chemie des Brompentafluorids. 4. Arylbrom(V)-dioxide und -fluoridoxide

Contributions to the Chemistry of Brominepentafluoride. 4. Arylbromine(V) Dioxides and Fluorideoxides . Arylbromine(V) tetrafluorides RBrF₄ (R=C₆F₅, p- and m-CF₃C₆H₄, o-FC₆H₄) react in aimed hydrolysis reactions or with (Me₃Si)₂O to the corresponding arylbrominedioxides RBrO₂. However with CsNO₃ as reagent for fluorine-oxygen substitution arylbrominedifluorideoxides RBrOF₂ are formed. Fluorine-oxygen substitution reactions on BrF₅ with (Me₃Si)₂O and [F₃CC(O)]₂O in organic solvents proceed via polysubstitution and end under formation of BrO₂F whereas with C₆F₅C(O)OSiMe₃ via monosubstitution BrOF₃ is obtained. In organic solvents bromine(V) fluorideoxides are — similar to BrF₅ — principally accessible to fluorine-aryl substitution what is demonstrated by the formation of C₆F₅BrO₂ from BrO₂F.