Respuesta :
These compounds are called stereoisomers. They have the same chemical formula, but differ in their geometric structural formula. The cis isomers have the same functional groups on the same side. Otherwise, the compound is in trans form. For example, the cis-trans isomers of 2-butene or but-2-ene are shown in the attached picture.

If a similar group is located on the same side of the double bond it is called -cis, but if the group is opposite it is called -trans
Further explanation
Isomers are two compounds that have the same chemical formula but different structural formulas
There is a grouping of isomers in Hydrocarbons, namely:
- 1. Structure isomer consisting of skeletal isomers, position isomers, and function isomers
- 2. Stereoisomers consisting of geometric isomers and optical isomers
Geometric isomers occur because of differences in the direction of the groups in the molecule
Geometrical isomers are found in compounds that have double bonds such as alkenes and the two C atoms bind 2 different groups, so that if the location of the groups are exchanged the shape becomes different
If a similar group is located on the same side of the double bond it is called -cis, but if the group is opposite it is called -trans
Example:
Atomicity to 2 butenes. Where in cis-2 butene, both methyl groups are located on the same side whereas, in trans-2 butene, both methyl groups are opposite
Learn more
an isomer
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a stereoisomer of trans-2-pentene
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the optically inactive stereoisomer (s) of 1,3-cyclopentanediol.
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Keywords: isomers, cis, trans, alkenes
