The number of geometrical isomers of butene are
-
2
- 3
- 5
- 4
The correct answer is: A
Explanation
Geometric isomers are two or more compounds with the same number and types of atoms, and bonds, but which have different geometries for the atoms.
Geometric isomers have the same connectivity but different geometries. They occur when substituents are locked in position next to or opposite each other.
Butene has four isomers:
- But-1-ene: CH\(_3\)CH\(_2\)CH=CH\(_2\)
- But-2-ene: CH\(_3\)CH=CHCH\(_3\)
- Cis but-2-ene: A geometrical isomer
- Trans but-2-ene: A geometrical isomer. Out of the four isomers, there are two geometric isomers which are cis but-2-ene and trans but-2-ene.