The reaction as pictured above is incorrect, the nitro group is not reduced. As you suggest this is (predominantly) an electrophilic aromatic substitution reaction.
Usually $\ce{HF}$ is used as a catalyst in these reactions and the following equilibrium is established.
$$\ce{XeF2 + HF <=> XeF+ + HF2^-}$$
The electrophilic $\ce{XeF^+}$ is the reactive species forming a complex with the aromatic ring. Xenon is expelled from the complex and the reaction proceeds to yield the meta-fluoro isomer as expected for an electrophilic aromatic substitution. Some other products, such as substituted biphenyls, are usually formed in small amounts suggesting that some minor pathway (radical-cation?) is also in play.
The reaction as pictured above is incorrect, the nitro group is not reduced. As you suggest this is (predominantly) an electrophilic aromatic substitution reaction.
Usually $\ce{HF}$ is used as a catalyst in these reactions and the following equilibrium is established.
$$\ce{XeF2 + HF <=> XeF+ + HF2^-}$$
The electrophilic $\ce{XeF^+}$ is the reactive species forming a complex with the aromatic ring. Xenon is expelled from the complex and the reaction proceeds to yield the meta-fluoro isomer as expected for an electrophilic aromatic substitution. Some other products, such as substituted biphenyls, are usually formed in small amounts suggesting that some minor pathway (radical-cation?) is also in play.
The reaction as pictured above is incorrect, the nitro group is not reduced. As you suggest this is (predominantly) an electrophilic aromatic substitution reaction.
Usually $\ce{HF}$ is used as a catalyst in these reactions and the following equilibrium is established.
$$\ce{XeF2 + HF <=> XeF+ + HF2^-}$$
The electrophilic $\ce{XeF^+}$ is the reactive species forming a complex with the aromatic ring. Xenon is expelled from the complex and the reaction proceeds to yield the meta-fluoro isomer as expected for an electrophilic aromatic substitution. Some other products, such as substituted biphenyls, are usually formed in small amounts suggesting that some minor pathway (radical-cation?) is also in play.
The reaction as pictured above is incorrect, the nitro group is not reduced. As you suggest this is (predominantly) an electrophilic aromatic substitution reaction.
Usually $\ce{HF}$ is used as a catalyst in these reactions and the following equilibrium is established.
$$\ce{XeF2 + HF <=> XeF+ + HF2^-}$$
The electrophilic $\ce{XeF^+}$ is the reactive species forming a complex with the aromatic ring. Xenon is expelled from the complex and the reaction proceeds to yield the meta-fluoro isomer as expected for an electrophilic aromatic substitution. Some other products, such as substituted biphenyls, are usually formed in small amounts suggesting that some minor pathway (radical-cation?) is also in play.
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