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

Abstract

2,4,6-Tri-tert-butylphenyltrifluorosilane (1) reacts with lithium amides to give the aminofluorosilanes (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 of 5 with BuLi in THF leads to the formation of the monomeric lithium derivative 8, R-SiF2Li⊕(THF)3-N⊖ -SiF2R. The polymeric lithium derivative 9 [R-SiF2-N⊖-SiRF2Li⊕(THF)2]n is obtained by recrystallisation of 8 in THF. In 8 and 9 lithium is only coordinated to fluorine and THF. Hydrolysis of 8 or 9 lead to the 1,3-disiloxane 10, (RSiF2)2O . 10 shows linearity at the oxygen and short Si-O bond lengths.