Reactions of [H2N(CH2)(3)](8)Si8O12 or its octahydrochloride salt with a va
riety of electrophiles, including anhydrides, lactones, acid chlorides, a,P
-unsaturated esters and isocyanates, afforded functionalized R8Si8O12 frame
works in good to excellent yields. Practical methods for the synthesis of [
HO(CH2)(3)](8)Si8O12, [OCN(CH2)(3)](8)Si8O12 and [(Ph2PCH2)(2)N(CH2)(3)](8)
Si8O12 are also reported.