Cis-trans geometric isomers in cyclic compounds

Geometric isomerism or cis-trans it occurs in aliphatic compounds and in cyclic compounds. In the text "Igeometrical summation or cis-trans” you've seen about this kind of stereoisomerism in open-chain compounds, now let's see when it occurs in cyclic compounds.

Geometric spatial isomerism or cis-trans occurs in closed-chain compounds that have two or more different groups attached to at least two carbon atoms in the chain. But, these different ligands on one carbon atom need to be the same as the ligands on the other carbon atom.

For example, consider the case of bromocyclopentane:

Bromocyclopentane formula

this compound no presents geometric isomerism cis-trans, as it has only one different ligand, bromine. Now look at the compound below:

Formula of 1,2-dimethylcyclobutane isomers

Two carbons in this structure have different ligands and the same as the other carbon atom. In the first case, the same ligands are on the same side of the plane, so this is a stereoisomer. cis. In the second molecule, the same ligands are on opposite sides of the plane, being called trans.


By Jennifer Fogaça
Graduated in Chemistry

Source: Brazil School - https://brasilescola.uol.com.br/quimica/isomeria-geometrica-cis-trans-compostos-ciclicos.htm

Café Filho Government (1954-1955)

Vargas' suicide meant that Café Filho's brief presence in the presidency was marked by great inst...

read more
Breastfeeding: importance, how long, orientation

Breastfeeding: importance, how long, orientation

Breastfeeding is the act of feeding the baby with breast milk directly from the mother's breast. ...

read more

Areas of Study of Biology

THE Biology (from the Greek βιος, bios = life; and λογος, logos = study) is the science responsib...

read more