Show how are the following alcohols prepared by the reaction of a suitable Grignard reagent on methanal?
`CH_(3)-underset(CH_(3))underset(|)(CH)-CH_(2)OH`
(b)

Explanation

(a) `underset("Methanal")(HCHO)+(CH_(3))_(2) overset(delta-)(CH)overset(delta+)(Mg)Br overset("Dry ether")to underset("Addition compound")([(CH_(3))_(2)CHCH_(2)overset(-)O overset(+)MgBr])`
`underset(-Mg(OH)Br)overset(H_(2)O //H^(+))to underset("2-methyl-propan-1-0l")((CH_(3))_(2)CH-CH_(2)OH)`