Question

conversion of dimethyl ether to methyl iodide

Answer 1

Dimethyl ether can be prepared by the reaction of sodium methoxide (CH3ONa) and methyl iodide (CH3I) with methanol as solvent, a Williamson ether synthesis reaction.

CH3ONa + CH3I → CH3OCH3 + NaI

Careful, though, the product, dimethyl ether, boils at -25º C so best fix a cold trap to the apparatus.