High-coordination number fluoro- and oxofluoro-anions; IF6O–, TeF6O2–, TeF7–, IF8– and TeF82–

Abstract

The novel hypervalent, highly coordinated, high-oxidation state anions IF₆O^–, TeF₆O^2–, TeF₇^–, IF₈^– and TeF₈^2– have been synthesized in anhydrous MeCN using anhydrous N(Me)₄⁺F^– as the fluoride ion source; the anions have been characterized by NMR and vibrational spectroscopy and represent novel examples of seven and eight-coordinate species having symmetries C_5v(IF₆O^–, TeF₆O^2–), D_5h, (TeF₇^–) and D_4d(IF₈^–, TeF₈^2–).