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2,4,6-Tri-tert-butylphenylaminofluorosilanes and Lithium-bis(2,4,6-tri-tert- butylphenyldifluorosilyl)amide – in the Crystal a Polymer

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2,4,6-Tri-tert-butylphenylaminofluorsilane und Lithium-bis(2,4,6-tri- tert-butylphenyldifluorsilyl)amid – im Kristall ein Polymer

2,4,6-Tri-tert-butylphenylaminofluorosilanes and Lithium-bis(2,4,6-tri-tert- butylphenyldifluorosilyl)amide – in the Crystal a Polymer

Regine Herbst-Irmer, Uwe Klingebiel

, Mathias Noltemeyer

Institut f¨ur Anorganische Chemie der Universit¨at G¨ottingen, Tammannstr. 4, D-37077 G¨ottingen, Germany

Herrn Prof. Dr. Edgar Niecke zum 60. Geburtstag gewidmet

Z. Naturforsch.54 b,314–320 (1999); eingegangen am 23. Oktober 1998

2,4,6-Tri-tert-butylphenyl Group, Aminofluorosilane, Lithium-fluorosilylamide, 1,3-Siloxane, Tris(fluorosilyl)amine

2,4,6-Tri-tert-butylphenyltrifluorosilane (1) reacts with lithium amides to give the aminofluo- rosilanes (2-7); RSiF2NHR' (R = 2,4,6-Me3CC6H2; R' = H (2), CMe3(3), SiMe2CMe3(4)), (R-SiF2)2NH (5), RSiF(NHR')2, R' = CMe3(6), C6H5(7). The reaction of5with BuLi in THF leads to the formation of the monomeric lithium derivative8, R-SiF2Li(THF)3-N -SiF2R. The polymeric lithium derivative9[R-SiF2-N -SiRF2Li(THF)2]nis obtained by recrystallisation of8in THF. In8and9lithium is only coordinated to fluorine and THF. Hydrolysis of8or9 lead to the 1,3-disiloxane10, (RSiF2)2O.10shows linearity at the oxygen and short Si-O bond lengths.

* Sonderdruckanforderungen an Prof. Dr. U. Klingebiel.

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