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GEOMETRIC ISOMERISM
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Geometric isomerism, also known as cis-trans isomerism, is one type of stereoisomerism.
Cis-trans isomers have identical molecular formulas and the atoms are bonded together in the same order, but they have different arrangements in space.
Cis-trans isomers are different compounds, so they have different physical and chemical properties.


Cis-trans isomerism in cycloalkanes

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Cis-trans isomerism in alkenes

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Cis-trans isomers cannot be converted into each other by spinning around the C-C bonds.  In the cycloalkanes the ring formation prevents this, while in the alkenes it is prevented by the double bond.

 

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Stereiosomerism

Stereoisomers have identical molecular formulae, the atoms are bonded together in the same succession, but in different position in the space.

ISOMERS

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same bonds different bonds
STEREO-
ISOMERS

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STRUCTURAL ISOMERS
GEOMETRIC ISOMERS
OPTICAL ISOMERS

 

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Vanna Vannucchi vvannucchi@hotmail.com