Question

The total number of structural isomers possible with molecular formula $C_3{H}_{6}C{l}_2$ are :

• A. 3
• B. 2
• C. 4
• D. 5

Answer 1

The correct option is C 4

Calculating the degree of unsaturation (DOU) :
For a given molecular formula $C_c{H}_{h}C{l}_x$
$DOU=(c+1)-\frac{h}{2}-\frac{x}{2}DOU=(3+1)-\frac{6}{2}-\frac{2}{2}=0$
There is no presence of $\pi$ bonds and rings.
Possible isomers are :


Hence (c) is the correct option.