The reaction of tetrakis (tri-tert-butylsilyl)tetrasilatetrahedrane(1) with
trityl tetrakis[3,5-bis(trifluoromethyl)phenyl]borate (TFPB) gave protonat
ed tetrasilatetrahedrane-monooxide, (tert-Bu3Si)(4)Si4OH+ (2(+)), whose str
ucture was determined by X-ray crystallography.