Question

The total number of acyclic 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

The correct option is A 12

Degree of unsaturation $=\frac{\left(2n_{c+2}\right)-(h_H+n_x)}{2}$

$=\frac{(2\times 4_{+2})-(7+1)}{2}=1^o$

D.U = 1^o$

here, C= carbon atoms

H = hydrogen atoms

X = halogen atoms

$1^o$ DU suggest that (on pound either contain one (C= C) bond or cyclic ring. Since acrylic isomers have been a sked in problem, the number of acrylic isomers in during stereisomers of $C_4{H}_{7}Cl$ is: