Controlled partial hydrolysis of spherosilicate frameworks: syntheses of endo-[(Me3SiO)6Si6O7(OH)4] and endo-[(Me3SiO)6Si6O7{OSiMe2(CH
CH2)}4] from [(Me3SiO)6Si6O9]
Abstract
Readily available (RMe2SiO)6Si6O9 (3 R = Me, 5 R = CHCH2); reacts cleanly with aqueous NEt4OH in THF to afford endo-C2h-(RMe2SiO)6Si6O7(OH)4 (7 R = Me, 9 R = CH
CH2); exhaustive silylation of 7 with (CH2
CH)- Me2SiCl/NEt3 affords endo-C2h-(Me3SiO)6Si6O7[OSiMe2(CH
CH2)]4 (10).