Question

How many geometrical isomers are possible for the below compound?

(A) $0$
(B) $2$
(C) $3$
(D) $4$

Answer 1

Hint : We know that the among the two forms, cis form is less stable due to the mutual repulsion between the two similar groups on the same side. The Trans form on the other hand has a less dipole moment or even is non- polar. Being polar, cis isomer has a higher boiling point and also a higher heat of hydrogenation, heat of combustion, refractive index and density.

Complete Step By Step Answer:
Isomers are compounds which have the same molecular formula but the arrangement of the atoms in the space is different. The physical and chemical properties of the isomers are not the same; they vary. The phenomenon of the existence of a compound in more than one form of isomers is known as isomerism. The isomers are of different type’s functional, position, chain isomers.
Chain isomers are the isomers which have the same molecular formula and are made up of carbon atoms but the atomic arrangement of these carbon atoms in space is different. The isomerism which arises due to the restriction of rotation around a bond in the molecule is known as Geometrical isomerism. The E-Z or the Cis -Trans are the common form of the Geometrical isomerism. Here the given compound too shows cis and Trans so the geometrical isomers will be two. The restriction in the rotation is usually around the double bond. Geometrical isomers are the classic example of the compounds that include one or more metal atoms or ions and one or more ligands that formally donate electrons to the metal. Thus they are also regarded as the coordination compounds.
Therefore, the correct answer is option B.

Note :
Remember that the geometrical isomer in which the similar groups are present in the same direction or on the same side of the double bond is known as the cis isomer. The geometrical isomer, in which the similar groups are present on the opposite sides of the double bond, is known as the Trans isomer.