NOMENCLATURE OF AROMATIC COMPOUNDS

• Structure contains two or more rings fused together

  Fused Rings
• 2 carbon rings that share a pair of carbon are said to be

  fused
• Uses the name of the substituent as a prefix to the name “benzene”

  Benzene Derivatives with One Substituent
• methylbenzene


  Toluene
• vinylbenzene

  Styrene
• TOLUENE


  CH3 OR METHY
• PHENOL


  OH OR ALCOHOL
• ANILINE


  NH2 OR AMMONIA GAS
• BENZOIC ACID

  O=C-OH OR CARBOXYLIC ACID
• BENZALDEHYDE


  O=C-H OR FORMYL
• ANISOLE


  O-CH3 OR METHOXY
• BENZENESULFONIC ACID


  SO3H OR SULFONIC ACID
• ACETOPHENONE


  O=C-CH3
• STYRENE


  VINYL GROUP
• Specify the positions of the substituents relative to one another

  Benzene Derivatives with Two Substituent
• describes a molecule with substituents at 1 and 2 positions on an aromatic compound

  ORTHO
• o describe a molecule with substituents are at the 1 and 3 positions on an aromatic compound

  META
•  a molecule with substituents at the 1 and 4 positions on an aromatic compound

  PARA
• BENZENE-1,2-DIOL


  CATHECHOL
• BENZENE-1,3-DIOL


  RESORCINOL
• BENZENE-1,4-DIOL


  HYDROQUINONE
• TWO METHYL GROUP


  XYLENE
• ONE METHYL AND ALCOHOL

  CRESOL
• ALCOHOL 


  PHENOL
• Positions are indicated with number

  Benzene with Three or More Substituents
• The ring is numbered in a way as to obtain the lowest possible numbers for carbon atoms with substituent

  Benzene with Three or More Substituents
• If there is a choice of numbering systems, the group that comes first alphabetically is given the lowest number.

  Benzene with Three or More Substituents