Draw the resonance structures for the following compounds. Show the electron shift using curved arrow notation.

(a)  ${\mathrm{C}}_6{\mathrm{H}}_5\mathrm{OH}$        (b) ${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{NO}}_2$         (c) ${\mathrm{CH}}_3\mathrm{CH}=\mathrm{CHCHO}$

(d) ${\mathrm{C}}_6{\mathrm{H}}_5-\mathrm{CHO}$    (e) ${\mathrm{C}}_6{\mathrm{H}}_5-\stackrel{\oplus }{\mathrm{C}}{\mathrm{H}}_2$     (f) ${\mathrm{CH}}_3\mathrm{CH}=\mathrm{CH}\stackrel{\oplus }{\mathrm{C}}\mathrm{H}-{\mathrm{CH}}_3$

For the following bond cleavages, use curved-arrows to show the electron flow and classify each as homolysis or heterolysis. Identify reactive intermediate produced as free radical, carbanion and carbocation.

${\mathrm{CH}}_3\mathrm{O}-{\mathrm{OCH}}_3\to {\mathrm{CH}}_3\dot{\mathrm{O}}+\dot{\mathrm{O}}{\mathrm{CH}}_3$

For the following bond cleavages, use curved-arrows to show the electron flow and classify each as homolysis or heterolysis. Identify reactive intermediate produced as free radical, carbanion and carbocation.

For the following bond cleavages, use curved-arrows to show the electron flow and classify each as homolysis or heterolysis. Identify reactive intermediate produced as free radical, carbanion and carbocation.

Cyclohexa -$2,5$-dien -$1$-one exists mainly in enol form. Which factor accounts for the stability of its enol form?

Draw all the resonating structures of the following compound:

Benzene

Draw all the resonating structures of the following compound:

Naphthalene

Draw all the resonating structures of the following compound:

Anthracene

Draw all the resonating structures of the following compound:

Phenanthrene