the procedure of choosing if a response experiences SN1, SN2, E1, or E2 as soliciting an arrangement from inquiries so call it The Quick N' Dirty Guide To SN1/SN2/E1/E2.

Once having taken a gander at a response and perceived that it has the potential for continuing through SN1/SN2/E1/E2 – that is, is it an alkyl halide, alkyl sulfonate (shortened as OTs or OMs) or liquor – and asked whether the carbon joined to the leaving gathering is essential, auxiliary, or tertiary, next can take a gander at the reagent for the response.

In substitution responses, a nucleophile shapes another bond to carbon, and a bond between the carbon and the leaving gathering is broken. In disposal responses, a base structures another bond with a proton from the carbon, the C-H bond breaks, a C-C π bond shapes, and a bond amongst carbon and departing gathering is broken.

In the event that you are asking, "Is the response: HCl + CH₃OH → CH₃Cl + H₂O a SN1 or a SN2process?". Provided that this is true, the answer is SN2.

SN1 requires the development of CH₃⁺. This is a very shaky carbocation, so the response won't go SN1.

The rate deciding stride in a SN2 response would be

Cl⁻ + CH₃-O⁺H₂ → [Cl•••CH₃•••OH₂]⁺ → Cl-CH₃ + OH₂

This is the favored instrument on the grounds that:

It dodges development of the methyl cation.

There is no steric obstacle to posterior assault by a nucleophile.

H₂O is a superb leaving bunch.

Cl⁻ is a genuinely decent nucleophile.