The stored Lewis connectivity is C₆H₅—CH₃. A methyl substituent replaces one benzene hydrogen while the six-carbon π system remains delocalized.
How to draw C₇H₈
Count 36 valence electrons. Include charge adjustments before drawing.
Use the reviewed connectivity C₆H₅—CH₃. Do not infer a different isomer from the formula alone.
Place the required single, double or multiple bonds. Keep a running electron total.
Complete terminal valence shells and add lone pairs or formal charges. A methyl substituent replaces one benzene hydrogen while the six-carbon π system remains delocalized.
Verify the total electron count and geometry. The reviewed geometry is Planar aromatic ring; tetrahedral methyl carbon.
Why this example matters
A methyl substituent replaces one benzene hydrogen while the six-carbon π system remains delocalized.
Scope and model limits
The page uses a Kekulé-style contributor plus an aromatic delocalization note; the ring does not alternate between fixed single and double bonds.
Common mistakes
Breaking the aromatic ring into a cyclohexane structure
Giving the methyl carbon a double bond to the ring