Substitution of the dimethylsilyl group in Si8O20[Si(CH3)2H]8 for another silyl group

The reaction of Si8O20[Si(CH3)2H]8 with X(CH3)2SiCl (X = CH3, CH2Cl, CH2Br) in a hexane/acetic acid solution gave Si8O20[Si(CH3)2X]8 in ⩾90% isolation yield, indicating that the dimethylsilyl group of Si8O20[Si(CH3)2H]8 can be substituted for another silyl group with retaining the double eight-membered ring silicate core.