Cis-trans isomerism is best described as

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Cis-trans isomerism is best described as

Cis-trans isomerism is about how substituents are arranged in space around a rigid double bond. Because rotation around a C=C bond is limited, the groups attached to each carbon can end up on the same side (cis) or on opposite sides (trans). This geometric arrangement creates two distinct isomers with different shapes and properties, even though the connectivity of the atoms is the same. It isn’t about mirror images or about changing which atoms are connected, which is why it isn’t describing mirror-image relationships or different connectivity. For example, in alkenes like 2-butene, the cis form has the two larger groups on the same side, while the trans form has them on opposite sides.

Cis-trans isomerism is about how substituents are arranged in space around a rigid double bond. Because rotation around a C=C bond is limited, the groups attached to each carbon can end up on the same side (cis) or on opposite sides (trans). This geometric arrangement creates two distinct isomers with different shapes and properties, even though the connectivity of the atoms is the same. It isn’t about mirror images or about changing which atoms are connected, which is why it isn’t describing mirror-image relationships or different connectivity. For example, in alkenes like 2-butene, the cis form has the two larger groups on the same side, while the trans form has them on opposite sides.

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