Monosubstituted benzene - Distinguishing Structural Isomers: Mono

Benzene monosubstituted 15.8: The

Benzene monosubstituted Directive influence

Benzene monosubstituted Substituents, Effect

Benzene monosubstituted Orientation in

Benzene monosubstituted Chapter 21:Reactions

Benzene monosubstituted Chapter 21:Reactions

Aromatic Reactivity

Benzene monosubstituted The Nomenclature

Benzene monosubstituted Aromatic Reactivity

Benzene monosubstituted Naming Aromatic

Chapter 21:Reactions of Aromatics

Benzene monosubstituted 15.8: The

1.8 Naming of Benzene and its derivatives

We find, for example, that nitration of nitrobenzene occurs smoothly at 95 ºC, giving meta-dinitrobenzene, whereas bromination of nitrobenzene ferric catalyst requires a temperature of 140 ºC.

  • These groups are called meta-directing groups, e.

  • We have already analyzed the activating or deactivating properties of substituents in terms of , and these same factors may be used to rationalize their influence on substitution orientation.

15.8: The Nomenclature of Monosubstituted Benzenes

The mechanism above shows that when electron density is withdrawn from the ring, that leaves the carbons at the ortho, para positions with a parital positive charge which is unfavorable for the electrophile, so the electrophile attacks the carbon at the meta positions.

  • Its molecular fragment can be written as C 6H 5CH 2-R, PhCH 2-R, or Bn-R.

  • When the molar ratio of benzene to alkyl halide falls below 1:1, para-ditert-butylbenzene becomes the major product.