How to Formaldehyde convert in 2 methyl propanol
Answers
Explanation:
Formaldehyde can be converted to acetone with following steps. a) Formaldehyde is treated with methyl magnesium bromide in presence of dry ether which on acid hydrolysis gives ethanol. b) Ethanol on oxidation by heating with Cu at 373 K gives acetaldehyde....
▪Step 1. Preparation of methylmagnesium bromide
CH3Br(bromomethane)+Mg
(dry ether)
−−−−−−−→
CH3MgBr (methylmagnesium bromide)
▪Step 2. Grignard addition to formaldehyde
CH2(=O)(formaldehyde)
CH3MgBr; H+
−−−−−−−−−−−−−→
CH3CH2OH(ethanol)
▪Step 3. Oxidation of ethanol
CH3CH2OH
PCC−−−−→
CH3CH(=O)(acetaldehyde)
▪Step 4. Grignard addition of another mole of
CH3MgBr CH3CH(=O)
CH3MgBr and H+
−−−−−−−−−−−−−→
CH3CHOHCH3(propan-2-ol)
▪Step 5. Oxidation of propan-2-ol
CH3CHOHCH3K2Cr2O7
H+
−−−−−−−−−→
CH3C(=O)CH3(acetone)
note : PPC=is pyridinium chlorochromate.