How many moles of glyoxal () are theoretically produced when exactly one mole of benzene undergoes c — Aromatic Hydrocarbons Chemistry Question
Question
How many moles of glyoxal ($CHO-CHO$) are theoretically produced when exactly one mole of benzene undergoes complete, vigorous ozonolysis followed by reductive cleavage with zinc and water?
Answer: 3
💡 Solution & Explanation
Ozonolysis cleaves all carbon-carbon double bonds. Benzene, theoretically represented by three alternating double bonds (Kekule structure), adds three moles of ozone to form a benzene triozonide. Upon reductive cleavage with $Zn/H_2O$, the six-carbon ring breaks down into three separate two-carbon fragments, specifically yielding exactly 3 moles of glyoxal.
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