Question

Diphenyl ether has degree of unsaturation:

• A. $7$
• B. $6$
• C. $9$
• D. $8$

Answer 1

Answer: (D)

$8$

First, we need to find out the corresponding alkane formula of the given unsaturated compound ($C_{12}{H}_{10}O$).
The corresponding alkane formula is $C_{12}{H}_{2\times 12+2}O\Rightarrow C_{12}{H}_{26}O$
$D.O.U=\frac{n_{sat.H-atoms}-n_{unsat.H-atoms}}{2}=\frac{26-10}{2}=8$

Option D is correct.