How do you attach an alkene to a benzene? 

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HF protonates one carbon, other carbon forms carbocation

rearangement possible

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How do you for bromobenzene from benzene 

Br_{2 +} Febr₃

How do you make chlorobenze from benzene?

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Cl₂ + AlCl₃

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How do you form nitro bezene from benzene

HN0_{3 +} H₂O₄

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convert nitrobenzene to aniline

 Zn, Sn, or Fs +

HCl