Arenes

• What is the molecular formula of Benzene?

  C6H6
• What was Kekules structure for Benzene?

  Cyclic

  Alternating single and double bonds
• How does Benzene differ from a typical Alkene?

  Doesn't undergo Electrophilic Addition reaction

  Doesn't decolourise Bromine
• What would be expected from the bond lengths of Benzene?

  You would expect them to have different bond length as there are supposedly C-C single and Double Bonds
• What is actually the case for the bond lengths of Benzene?

  They are the same length
• What is the expected bond enthalpy of Benzene based on Kekules structure?

  -360
• What is the actual bond enthalpy of Benzene?

  -208
• What does this reduced enthalpy suggest about Benzene's actual structure?

  It is more Stable
• What is Benzene's Structure?

  Hexagonal ring of Carbons with a ring of Delocalised electrons in the middle
• What are Aromatic Compunds?

  Compounds with a Benzene ring attached
• What Mechanism will Benzene undergo?

  Electrophilic Substitution
• What are Friedel-Crafts Reactions

  Substitution Reactions used to add extra carbon atoms to a Benzene Ring
• What are the conditions for Friedel-Crafts Acylation?

  Reflux under Anhydrous Conditions
• What is the equation for Friedel-Crafts Acylation?

  $\left[AlCl4\right]^-+$$H^+$$\rightarrow AlCl3+$$HCl$
• What is the Equation for the Formation of the Electrophile that forms Nitrobenzene?

  HNO3 + H2SO4---> [NO2]+ +[HSO4]- + H2O