JEE Main levelSingle correct optionDifficulty 2 of 3o2189
3,3-Dimethylbut-1-ene is hydrated with dilute HX2SOX4. The major product is
A2,3-dimethylbutan-1-ol
B3,3-dimethylbutan-2-ol
C3,3-dimethylbutan-1-ol
D2,3-dimethylbutan-2-ol
Answer: D
The secondary cation (CHX3)X3C−CHX+−CHX3 undergoes a 1,2-methyl shift to give the tertiary cation (CHX3)X2CX+−CH(CHX3)X2. Water adds to it to give 2,3-dimethylbutan-2-ol.