Question

Please provide explanation of alkylation could take place on sulfur better than oxygen.

Answer 1

yes on sulphur is better than oxygen

while learning about the nucleophilic substitution reactions you might be learned about the nucleophilicity

let me explain

which is more nucleophile some thing that can attack with his lone pair is more nucleophile right?

then why sulphur

compare to the O sulphur is less electronegitive

electrinegitive means capable of baring the electron

so which is having the more electronegitive can bare the electron density more means will give out side less

but which can give electron density out side is more nucleophile riht?

so sulphur is less electronegitive so less capable of bearing electrons so more tendency to give out side so more reactive compare to oxygen