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Geometric (cis / trans) isomerism
These isomers occur where you have restricted rotation somewhere in a molecule. At an introductory level in organic chemistry, examples usually just involve the carbon-carbon double bond.
In one, the two chlorine atoms are locked on opposite sides of the double bond. This is known as the trans isomer. In the other, the two chlorine atoms are locked on the same side of the double bond. This is known as the cis isomer
The most likely example of geometric isomerism you will meet at an introductory level is but-2-ene. In one case, the CH3 groups are on opposite sides of the double bond, and in the other case they are on the same side.
Geometric (cis / trans) isomerism
These isomers occur where you have restricted rotation somewhere in a molecule. At an introductory level in organic chemistry, examples usually just involve the carbon-carbon double bond.
In one, the two chlorine atoms are locked on opposite sides of the double bond. This is known as the trans isomer. In the other, the two chlorine atoms are locked on the same side of the double bond. This is known as the cis isomer
The most likely example of geometric isomerism you will meet at an introductory level is but-2-ene. In one case, the CH3 groups are on opposite sides of the double bond, and in the other case they are on the same side.
Geometric (cis / trans) isomerism
These isomers occur where you have restricted rotation somewhere in a molecule. At an introductory level in organic chemistry, examples usually just involve the carbon-carbon double bond.
In one, the two chlorine atoms are locked on opposite sides of the double bond. This is known as the trans isomer. In the other, the two chlorine atoms are locked on the same side of the double bond. This is known as the cis isomer
The most likely example of geometric isomerism you will meet at an introductory level is but-2-ene. In one case, the CH3 groups are on opposite sides of the double bond, and in the other case they are on the same side.
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I think you are asking about trans isomer. It is the geometrical isomer with two same type of groups on the opposite side of the double bond or to the plane of a ring.
Ref: http://www.adichemistry.com/organic/basics/isomerism/geometrical/geometrical-isomerism.html