(Solution) - Nitro substituted aromatic compounds that do not bear halide leaving groups -(2025 Original AI-Free Solution)

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Nitro-substituted aromatic compounds that do not bear halide leaving groups react with nucleophiles according to the equation

The product of this reaction, as its sodium salt, is called a Meisenheimer complex after the German chemist Jacob Meisenheimer, who reported on their formation and reactions in 1902. A Meisenheimer complex corresponds to the product of the nucleophilic addition stage in the addition- elimination mechanism for nucleophilic aromatic substitution.
(a) Give the structure of the Meisenheimer complex formed by addition of sodium ethoxide to 2,4,6-trinitroanisole.
(b) What other combination of reactants yields the same Meisenheimer complex as that of part (a)?