Draw two constitutional isomers of$cis-\mathbf{1},\mathbf{2}-\mathbf{dibromocyclopentane}$.

Cis configuration is when two groups are on the same face of the ring and trans configuration is when the groups are on opposite faces.

Both isomers are stable and neither can be converted into the other without breaking and reforming chemical bonds.

Constitutional isomers are the molecules that are different in connectivity, the way in which the constituent atoms are connected to one another.They have the same molecular formula but different connectivity.

Count the number of carbon atoms in the ring and the number in the largest substituent whichever has highest carbon atom will be considered as parent. If the number of carbon atoms in the ring is equal to the number in the substituent in that case ring is taken as parent.

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For an alkyl- or halo-substituted cycloalkane, choose a point of attachment as carbon 1 and number the substituents on the ring so that the secondsubstituent has as low a number as possible. Same procedure for third or fourth substituent so has low number as much as possible, until a point of difference is found.

Structure of the possible or consecutive isomers has been mentioned below here with their respective stereochemistry of the bromine atom