Darstellung und Kristallstrukturen von tBu‐substituierten Disiloxanen des Typus tBu2SiX‐O‐SiYtBu2 (X = Y = OH,Br; X = OH,Y = H) und den Addukten tBu3SiOH·(HO3SCF3)0.5·H2O und tBu3SiOLi·(LiO3SCF3)2·(H2O)2 |
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| Authors: | H‐W Lerner S Scholz N Wiberg K Polborn M Bolte M Wagner |
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| Abstract: | Syntheses and Crystal Structures of tBu‐substituted Disiloxanes tBu2SiX‐O‐SiYtBu2 (X = Y = OH, Br; X = OH, Y = H) and of the Adducts tBu3SiOH·(HO3SCF3)0.5·H2O and tBu3SiOLi·(LiO3SCF3)2·(H2O)2 The disiloxanes tBu2SiX‐O‐SiYtBu2 (X = Y = H, OH) are accessible from the reaction of CF3SO2Cl with tBu2SiHOH or tBu2Si(OH)2. By this reaction the disiloxane tBu2SiH‐O‐SiHtBu2 is formed together with tBu2SiH‐O‐SiOHtBu2. The disiloxanes tBu2SiX‐O‐SiYtBu2 (X = Y = Cl, Br) can be synthesized almost quantitatively from tBu2SiH‐O‐SiHtBu2 with Cl2 and Br2 in CH2Cl2. The structures of the disiloxanes tBu2SiX‐O‐SiYtBu2 (X = H, Y = OH; X = Y = OH, Br) show almost linear Si‐O‐Si units with short Si‐O bonds. Single crystals of the adducts tBu3SiOH·(HO3SCF3)0.5·H2O and tBu3SiOLi·(LiO3SCF3)2·(H2O)2 have been obtained from the reaction of tBu3SiOH with CF3SO3H and of tBu3SiO3SCF3 with LiOH. According to the result of the X‐ray structural analysis (hexagonal, P‐62c), tBu3SiOLi · (LiO3SCF3)2·(H2O)2 features the ion pair (tBu3SiOLi)2(LiO3SCF3)3(H2O)3Li]+ CF3SO3]?. The central framework of the cation forms a trigonal Li6 prism. |
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| Keywords: | Disiloxane Triflate X‐ray structure analysis |
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