Question

Maximum resonating structure can be formulated for the free radical :
$[Where\Phi =C_6{H}_5]$

• A. $\Phi -\dot{C}H-\Phi$
• B. $C{H}_2=CH-\dot{C}{H}_2$
• C. $\Phi -\dot{C}{H}_2$
• D. $\Phi -\dot{C}H-C{H}_3$

Answer 1

The correct option is A $\Phi -\dot{C}H-\Phi$

$\text{Number of resonating structures can}$ $\text{be determined by the formula.}$

$\text{Number of pi bonds}+1\text{.}$

$C_6{H}_5-CH-C_6{H}_5$ will have 7

resonating structures.

${CH}_2=CH-O\dot{C}{H}_2$ will have 2 resonating structures

$C_6{H}_5-C{CH}_2^{\circ }$ will have 4 resonating structures.

$C_6{H}_5-C^{\circ }H{CH}_3$ will also have 4 resonating structure.

Hence $C_6{H}_5-C^{\circ }H-C_6{H}_5$ how maximum resonating structure.