Which of the following compounds would show geometrical isomerism? Draw the isomeric structures to support your answer:
(i) But-2-ene
(ii) Pent-1-ene
(iii) 2-Methyl-But -2-ene
(iv) 3, 4-Dimethyl-hex-3-ene

The compounds (i) 2-Butene and (iv) 3, 4-Dimethyl-3-hexene would show geometrical isomerism. In both the cases, the two atoms or groups attached to the double bonded carbon atoms are different. 

(i) But -2- ene (CH₃ - CH = CH - CH₃) exhibits geometrical isomerism.



(iv) 3, 4-Dimethylhex-3-ene: