Why do alkenes show geometrical isomerism? Explain with examples.

Asked by Topperlearning User | 1st Jun, 2016, 01:50: PM

Expert Answer:

  • Due to C=C bond, the rotation around this bond is restricted.
  • Geometrical isomerism is due to the presence of like groups on the same side(cis-isomer) or on the opposite side (trans-isomer).
  • The presence of two different groups at the doubly bonded carbon is the necessary and sufficient condition for geometrical isomerism.

             C(a,b) = C(a,b) , C(a,b) = C(e,f) or

              C(a,b) = C(a,d) all show geometrical isomerism.

Answered by  | 1st Jun, 2016, 03:50: PM