question_answer

Which of the following will have geometrical isomers?

A)  2-methylpropene

B)  2-butene

C)  1-butene       

D)  Propene

Correct Answer: B

Solution :

Two or more organic compounds having same molecular formula and same structural formula but different spatial arrangement of atoms or groups round doubly bonded carbon atoms are known as geometrical isomers and the phenomenon is known as geometrical isomerism. Geometrical isomerism has been noticed s.         and. \[-N=N-\]molecules as well as in cycloalkenes, heterocyclic compound, and  allenes. \[\therefore \] Butene-2 shows geometrical isomerism    \[\underset{(cis\,form)}{\mathop{\underset{H-C-C{{H}_{3}}}{\overset{H-C-C{{H}_{3}}}{\mathop{||}}}\,}}\,\]                \[\underset{(trans\,form)}{\mathop{\underset{{{H}_{3}}C-C-C{{H}_{3}}}{\overset{H-C-C{{H}_{3}}}{\mathop{||}}}\,}}\,\]