Answer:
Substitution; SN2, SN1; carbonation, two steps; SN1,SN2
Explanation:
Alkyl halides undergo substitution reactions with nucleophiles. Strong nucleophiles favor the SN2_ mechanism over the _SN1_ mechanism. An SN1 mechanism forms a carbonation as a reactive intermediate and the mechanism has two steps. Protic solvents favor SN1 mechanism and aprotic solvents favor the SN2 . SN1 reactions proceed with racemization at a single stereogenic center. Increasing alkyl substitution favors an SN1 mechanism while decreasing alkyl substitution favors an SN2 mechanism. A Carbonation is a positively charged carbon atom