How would you synthesize each of the following? a. 1,2-dibromopropane from propene b. acetone (2-propanone) from an alcohol c. tert-butyl alcohol ( 2 -methyl-2-propanol) from an alkene (See Exercise 62.) d. propanoic acid from an alcohol

a. Brominate propene using Br2 to form 1,2-dibromopropane. \[ \text{Propene + Br}_2 \rightarrow \text{1,2-dibromopropane}\] b. Oxidize propan-2-ol using K2Cr2O7 and H2SO4 to form acetone (2-propanone). \[ \text{Propan-2-ol + K}_2\text{Cr}_2\text{O}_7 + \text{H}_2\text{SO}_4 \xrightarrow[]{\Delta} \text{2-propanone (acetone)}\] c. Hydrate 2-methylpropene using H2O and H2SO4 to form tert-butyl alcohol (2-methyl-2-propanol). \[ \text{2-Methylpropene} + \text{H}_2\text{O} + \text{H}_2\text{SO}_4 \rightarrow \text{tert-butyl alcohol (2-methyl-2-propanol)}\] d. Oxidize propan-1-ol using K2Cr2O7 and H2SO4 to form propanoic acid. \[ \text{Propan-1-ol} + 2 \, \text{K}_2\text{Cr}_2\text{O}_7 + 2 \, \text{H}_2\text{SO}_4 \xrightarrow[]{\Delta} \text{Propanoic acid}\]