Tert-Butyl chloride
tert-Butyl chloride is the organochloride with the formula. It is a colorless, flammable liquid. It is sparingly soluble in water, with a tendency to undergo hydrolysis to the corresponding tert-butyl alcohol. It is produced industrially as a precursor to other organic compounds.
Synthesis
tert-Butyl chloride is produced by the reaction of tert-butyl alcohol with hydrogen chloride. In the laboratory, concentrated hydrochloric acid is used. The conversion entails a SN1 reaction as shown below.| Step 1 | Step 2 | Step 3 |
| The acid protonates the alcohol, forming a good leaving group. | Water leaves the protonated t-BuOH, forming a relatively stable tertiary carbocation. | The chloride ion attacks the carbocation, forming t-BuCl. |
The overall reaction, therefore, is:
Because tert-butanol is a tertiary alcohol, the relative stability of the tert-butyl carbocation in the step 2 allows the SN1 mechanism to be followed, whereas a primary alcohol would follow an SN2 mechanism.