.tau.-Silicon stabilization of carbonium ions in solvolysis. 4. Solvolysis of cis- and trans-3-(trimethylsilyl)cyclohexyl and -3-tert-butylcyclohexyl p-bromobenzenesulfonates
.tau.-Silicon stabilization of carbonium ions in solvolysis. 4. Solvolysis of cis- and trans-3-(trimethylsilyl)cyclohexyl and -3-tert-butylcyclohexyl p-bromobenzenesulfonates