The Reaction between Sulfur Dioxide and Hexamethyldisilazane. 3. The Characterization of Ammonium (Trimethylsilyl )sulfite
The reaction between ((CH3)3Si)2NH and S02 results in the formation of an ionic solid with empirical formula NH4(CH3)3SiOSO2 which readily “sublimes” at ambient temperature. Although (trimethylsilyl)ammonium bisulfite is a logical choice for a molecular formula, IR, NMR, and XPS data rule out the presence of RNH3+ and HSOf ions. These data, along with a consideration of the solution behavior of this unique material, provide strong evidence that the substance is ammonium (trimethylsilyl)sulfite, with the silicon bonded to oxygen rather than sulfur. © 1981, American Chemical Society. All rights reserved.
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