Question

what is role of concentrated H2SO4 in pinacol pinacalone reaction?​

Answer 1

Answer:

I would also say A.{PINNACOL PINNACOLON REARRANGEMENT)

First H+ can create carbocation at any one of the carbon and then methyl shift(CH3-) from other carbon can occur and we would get positive charge on carbon attached directly with OH , and then OH can share its lone pair and form double bond O. So ketone on left and four degree carbon on right

Answer 2

The pinacol–pinacolone rearrangement is a method for converting a 1,2-diol to a carbonyl ... In these reactions, the stereochemistry of the diol plays a crucial role in deciding the major product.