Synthesis of Five‐ and Six‐Coordinate Tris(pentafluoroethyl)fluorosilicates |
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| Authors: | Simon Steinhauer Dr. Hans‐Georg Stammler Beate Neumann Nikolai Ignat'ev Prof. Dr. Berthold Hoge |
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| Affiliation: | 1. Fakult?t für Chemie, Universit?t Bielefeld, Universit?tsstrasse 25, 33615 Bielefeld (Germany);2. Merck KGaA, Frankfurter Strasse 250, 64293 Darmstadt (Germany) |
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| Abstract: | The research area of perfluoroalkylsilanes is still in its infancy. Although there are already many examples of difluorotriorganylsilicates, the first example of a completely characterized trifluorotriorganylsilicate is presented, the dianion [Si(C2F5)3F3]2?. The strongly electron‐withdrawing influence of the pentafluoroethyl groups appears to be a fundamental cause of the stability of this compound. This dianion is also the first structurally characterized example of a tris(pentafluoroethyl)silicon compound. The synthesis and complete characterization of [PPh4]2[Si(C2F5)3F3] and [PPh4][Si(C2F5)3F2] along with the precursor [H(OEt2)2][Si(C2F5)3F2] was achieved from SiCl4 and LiC2F5. |
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| Keywords: | perfluoroalkyl groups silicates silicon weakly coordinating anions |
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