2,4,6-tri-tert-butylphenylaminofluorosilanes and lithium-bis(2,4,6-tri-tert-butylphenyldifluorosilyl)amide - in the crystal a polymer

2,4,6-Tri-tert-butylphenyltrifluorosilane(1) reacts with lithium amides to give the aminofluorosilanes (2 7); RSiF2NHR1 (R = 2,4,6-Me3CC6H2; R-1 = H ( 2), CMe3 (3), SiMe2CMe3 (4)), (R-SiF2)(2)NH (5), RSiF(NHR1)(2), R' = CMe3 ( 6), C6H5 (7). The reaction of 5 with BuLi in TI-IF leads to the formation o f the monomeric lithium derivative 8, R-SiF2Li+(THF)(3)-N--SiF2R. The polym eric lithium derivative 9 [R-SiF2-N- -SiRF2Li+(THF)(2)](n) is obtained by r ecrystallisation of 8 in THF. In 8 and 9 lithium is only coordinated to flu orine and TI-IE Hydrolysis of 8 or 9 lead to the 1,3-disiloxane 10, (RSiF2) (2)O. 10 shows linearity at the oxygen and short Si-O bond lengths.