Gregory W. Drake, K. Christie, W. Wilson
Feb 24, 1998
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Abstract
Abstract : High coordination anion chemistry has developed rapidly in the last decade most notably in the field of binary fluorides. The discovery of a truly anhydrous fluoride source, tetramethylammonium fluoride, (CH3)4NF, has led to a renaissance in main group chemistry. Tetramethylammonium fluoride is thermally stable, soluble in organic solvents, and surprisingly resistant to powerful oxidizers such as ClF3, BrF5, and IF7. Many new anions have been synthesized and characterized through the use of this fluoride source. However, relatively few dianions have been studied and characterized to date, including XeF8 (sup 2-), TeOF6 (sup 2-), TeF8 (sup 2-), and MF5 (sup 2-) (M = As, Sb, Bi). Problems plaguing the study of new dianions include poor solubility in solution, and the equilibrium between the dianion and its monoanion and fluoride precursors. Several new fluorodianions have been synthesized, characterized through vibrational spectroscopy, and compared to theoretical calculations.