TY - DATA T1 - Silanetriols as Powerful Starting Materials for Selective Condensation to Bulky POSS Cages PY - 2015/12/17 AU - Natascha Hurkes AU - Clemens Bruhn AU - Ferdinand Belaj AU - Rudolf Pietschnig UR - https://acs.figshare.com/articles/journal_contribution/Silanetriols_as_Powerful_Starting_Materials_for_Selective_Condensation_to_Bulky_POSS_Cages/2045949 DO - 10.1021/om5010918.s001 L4 - https://ndownloader.figshare.com/files/3617265 KW - silanetriol KW - CH KW - carbon substituents KW - trifluoroacetic acid KW - multinuclear NMR KW - T 8 cages KW - formation KW - Bulky POSS CagesControlled condensation reactions KW - Selective Condensation KW - MS KW - alkoxysilane counterparts KW - disiloxane tetrols N2 - Controlled condensation reactions of tertiary silanetriols CH3(CH2)n(CH3)2CSi­(OH)3 (1b–f; n = 1–5) in the presence of trifluoroacetic acid and the hydrolysis of CH3(CH2)6(CH3)2CSiCl3 (3) lead to the selective formation of the corresponding disiloxane tetrols [CH3(CH2)n(CH3)2CSi­(OH)2]2O (2b–g; n = 1–6) in good yields. The TBAF-driven condensation reactions of the silanetriols CH3(CH2)n(CH3)2CSi­(OH)3 (1a–c; n = 0–2) as well as of the disiloxane-1,1,3,3-tetrol 2d (n = 3) yield in the selective formation of the first T8 cages bearing tertiary carbon substituents, CH3(CH2)n(CH3)2C (4a–d; n = 0–3), which was not possible via the condensation of their alkoxysilane counterparts so far. The resulting compounds 2b–g and 4a–d have been characterized by multinuclear NMR, MS, and single-crystal X-ray diffraction. ER -