3 -methylbutanoic acid gives isobutane on decarboxylation i.e., CH3−
CH
|
CH3
−CH2COOH
NaOH∕CaO
→
Δ
3-methylbutanoic acid CH3−
CH
|
CH3
−CH3+CO2 ↑ While Wurtz reaction of C2H5Br gives, n-butane and hydrolysis of n-butyl magnesium bromide gives n-butane but reduction of propanol with HI/P gives propane