Which of the following conditions favor the SN1 mechanism as opposed to the SN2 mechanism?

Which of the following conditions favor the SN1 mechanism as opposed to the SN2 mechanism?

I. tertiary alkyl halide II. primary alkyl halide III. polar solvent

A. only I B. only II C. I and III D. II and III

Solution: SN1 mechanism is favored by tertiary alkyl halide (will make the most stable carbocation) and polar solvent. Choice C is correct.