Question

The total number of acylic isomers including the stereoisomers (geometrical and optical), with the molecular formula $C_4{H}_{7}Cl$ is

• A. 12
• B. 11
• C. 10
• D. 9

Answer 1

Answer: (A)

Twelve in all
(a) Six geometrical isomers


(b) Two optical isomers
(vii) $C{H}_3-\underset{\stackrel{|}{H}}{\stackrel{\underset{|}{C}l}{{}^{\ast }C}}-CH=C{H}_2$
(viii) $C{H}_3-\underset{\stackrel{|}{C}l}{\stackrel{\underset{|}{H}}{{}^{\ast }C}}-CH=C{H}_2$
(c) Four structural isomers
(ix) $C{H}_{3}C{H}_2-\stackrel{\underset{|}{C}l}{C}=C{H}_2$
(x) $C{H}_3-\stackrel{\underset{|}{C}{H}_3}{C}=CHCl$
(xi) $C{H}_3-\stackrel{\underset{|}{C}{H}_{3}Cl}{C}=C{H}_2$
(xii) $ClC{H}_2-C{H}_2-CH=C{H}_2$