Question

Question 13.21 Write structures of all the alkenes which on hydrogenation give 2-methylbutane.

Class XI Hydrocarbons Page 397

Answer 1

This is your answer
of 2-metyl butane

Answer 2

Structure of 2-methyl butane is CH3-CH(CH3)-CH2-CH3. Putting the double bond at different positions and also the tetravalancy of each carbon atom in the molecule, the structures of various Alkene which give 2 - methylbutane on hydrogenation are :

CH2=C(CH3)-CH2-CH3 (2 methylbut-1-ene )
CH3-C(CH3)=CH-CH3(2-methylbut-2-ene)
CH3-CH(CH3)-CH=CH2(3-methylbut-1-ene)