Doubt from Organo-Metallic Compounds


What will happen when excess of R Li is reacted with So2? In case of RMGX it stops at suphinic acid but as we see in case of co2 and RLi ketone is formed but rmgx stops at carboxylic acid (as rLi is more reactive than rmgx) will this happen in case of So2 as well?




In RLi ,lithium is small cation so it has more polarising power (Fajans rule)compared to Mg2+ ion in Grignard reagent.
So with Co2 it gives ketone.I expect similar to happen with So2 as well.