Write the mechanism of the reaction of HI with methoxymethane .

Explanation

Methoxymethane reacts with HI to give iodomethane and methanol .
`underset("Methoxymethane")(CH_(3)-O-CH_(3))+Hitounderset("Iodomethane")(CH_(3)I)+underset("Methanol")(CH_(3)OH)`
However , with excess of HI at higher temperature iodomethane is the only product .
`underset("Methoxymethane")(CH_(3)-O-CH_(3))+underset(("Excess"))(2HI)tounderset("Iodomethane")(2CH_(3)I)+H_(2)O` .