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ELECTROPHILIC AROMATIC SUBSTITUTION …
750 CHAPTER 16 THE CHEMISTRY OF BENZENE AND ITS DERIVATIVESThis hybridization allows one of its electron pairs to occupy a 2porbital, which has the samesize, shape, and orientation as the carbon 2porbitals of the ring. In other words, an oxygen 2porbital overlaps more effectively with the carbon 2porbitals of the ring than an oxygen sp3or-bital would. (We learned about the same effect in resonance-stabilized allylic systems; p. 713).The UV spectrum of anisole is a direct consequence of this (a) Explain why compound Ahas a UV spectrum with considerably greater lmaxvalues andintensities than are observed for ethylbenzene.(b) In view of your answer to part (a), explain why the UV spectra of compounds Band Carevirtually How could you distinguish styrene (PhLCHACH2) from ethylbenzene by UV spec-troscopy? AROMATIC SUBSTITUTION reactions OF BENZENEThe most characteristic reaction of benzene and many of its derivatives is ELECTROPHILIC aro-matic SUBSTITUTION .
16.4 ELECTROPHILIC AROMATIC SUBSTITUTION REACTIONS OF BENZENE 751 A. Halogenation of Benzene When benzene reacts with bromine under harsh conditions—liquid bromine, no solvent, and
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Substitution Reactions of Aromatic Compounds, REACTIONS, Reactions of Aromatic Compounds Aromatic, Aromatic substitution, Aromatic compounds, Reactions of Aromatic Compounds, Benzene, AROMATIC, CHEMISTRY OF THE, CHEMISTRY OF THE AROMATIC HETEROCYCLES, Aro-matic substitution, NH N N N H, Compounds, Synthesis of Triarylmethane and Xanthene Dyes