Difference Between Between Cis and Trans Isomers

When we are studying about isomers in chemistry, we will come across various types of isomers. Whie they are mainly divided into two groups namely constitutional isomers and stereoisomers there are more sub-type of isomers that we need to learn about. As such, cis and trans isomers are such type of isomers which we will learn about here in this page. We will study what these isomers are and the key differences between cis and trans isomers.

Usually, cis and trans isomerism can be found in organic and inorganic compounds, alkanes and in alkenes. Cis isomer is an isomer where two of the same atoms are on the same side of the double bond in a molecule. A trans isomer consists of molecule with two same atoms but here the atoms lie in the opposite side of the double bond. Trans and cis isomers have the same molecular formula and molecular weight, but they differ in some aspects.

Difference Between Between Cis and Trans Isomers

When we talk about the difference between cis and trans isomers, one of the main differences is in the arrangement of the atoms in a double bond. However, we will look at some of other key differences between the two below.

Difference Between Between Cis and Trans Isomers

Cis

Trans

Cis isomers are molecules with the same connectivity of atoms. They further consist of identical side groups usually on the same side.

A trans isomer has molecules with two same atoms but in the opposite side of the double bond.

It is most of the time a polar molecule.

It is nonpolar or less polar molecule.

Due to loosely packed molecules the

melting point of cis isomer is comparatively low.

Due to tightly packed molecules the

melting point of trans isomer is high.

Likewise, due to the presence of strong attraction forces between atoms cis isomers have a high boiling point.

The boiling point is comparatively low for trans isomer as there are no strong attraction forces.

Cis isomers have highly soluble in inert solvents.

They are less soluble in inert solvents.

These type of isomers have higher acidic strength.

In trans isomers, the protons are not easily released. So it has less acidic strength.

These are some of the differences between cis and trans isomers. To know more about isomers and other chemistry topics you can keep visiting BYJU’s or download our app for interesting content and learning experience.

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The decomposition of hydrogen peroxide is a first-order reaction. The half-life of the reaction is 17.0 minutes. What is the rate constant of the reaction?