Question

I am having trouble differing between Sn1, Sn2, E1, and E2 reactions. Please help me understand how to approach these problems. I've attempted to answer them, but I am not confident in my answers. Please show me how to get to the correct answer.

1. [is it A?]

Predict the mechanism (S\2, E2, SN1, or E1) by which the following reagents will react: HSCH3 Br A. SN2 B. E2 C. SN1 D. E1

2. [Is it C?]

3. [is it 3 and 4?]

A) I
B) II
C) III
D) IV
E) I and II
F) III and IV

Answer 1

" With this = eliminating not possible (No ""H"" at adjacent with sp^3 carbon) Therefore E' X E^2 X pKa of CH_3 SH is 10 & p^Ka of CH_3 OH = 15 Therefore CH_3 SH is more protic than CH_3 OH Therefore SH' allylic carbocation is Resonance stable option (c) Answer is (B) E^2: If aprotic solvent given: Then SN^2 CH_3 OH is protic solvent Therefore SN' Therefore Answer is (F) (iii) & (IV)"