Class 12 Chemistry Haloalkanes and Haloarenes Nomenclature

Nomenclature

  • Nomenclature of halo alkanes
  • Select the longest chain of carbon that contains the halogen atom.
  • Give least possible number to the halogen atom.
  • The carbon containing double or triple bond is given the least number.
  • Place the suitable suffix like di, tri, tetra for 2, 3, 4 halogen atoms respectively.
  • Name the compounds as halo alkanes, halo alkenes or halo alkynes.
  • For example,

  • Nomenclature of halo arenes
  • Commonly they are termed aryl halides.
  • Numerical prefixes (1,2) ; (1,3) ; (1,4) for [for positions of the compound with respect to halogen atom.
  • The halogen atom is given the least number.
  • For example,

Problem:

Give the IUPAC names of the following compounds:

(i) CH3CH(Cl)CH(Br)CH3

(ii) CHF2CBrClF

(iii) ClCH2C≡CCH2Br

(iv) (CCl3)3CCl

(v) CH3C(p-ClC6H4)2CH(Br)CH3

(vi) (CH3)3CCH=CClC6H4I-p

Solution:

Problem:

Write structures of different dihalogen derivatives of propane.

Solution:

Problem:

Give the IUPAC names of the following compounds:

 

Solution:

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