A is faster than B. ii. B is faster than A . The rate of reaction A is zero. The rate of reaction B is zero. Both A and B proceed at roughly the same rate.
Hydroxide ion is normally a poor leaving group.
In reaction A , hydroxide departure forms a conjugated enone, so we expect reaction A to proceed with a nonzero reaction rate. Therefore answer i is correct, and answers ii, iii, and v are incorrect. Provide a detailed, curved-arrow mechanism for the following reaction. Assign a pK a value to each structure. Briefly explain your reasoning.