Question

Which one is correct decreasing order of SN1 reactivity of the following molecule 1) thiophene 2) pyridine​

Answer 1

Answer:

In the SN1 reaction carbocation intermediate is formed.

More stable the carbocation more is the reactivity.

Stability order for carbocation is:

Benzyl > Allyl carbocation > secondary carbocation > primary

The correct decreasing order of SN1 reactivity is;

I.PhCH2​X>II.CH2​=CHCH2​X>III.Me2​CHX>IV.C2​H5​X

Option A is correct.

Explanation:

Hope this helps you.