Stereoisomerism

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  • Created by: Laura
  • Created on: 04-07-13 21:41
What is E –Z isomerism?
The arrangement of elements around a C=C bond. E-isomerism (trans) opposite sides Z-isomerism (cis) same side.
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What is Optical Isomerism?
When 4 different elements attach to one Carbon. 2 identical isomers are created but cant be superimposed. Optical isomers rotate the plane of polaration of polarised light indifferent ways: + isomer rotates clockwise, - isomer rotates anticlockwise
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What is a racemic mixture?
A solution with equal concentrations of both enantiomers, its optically inactive and doesn’t rotate the plane of polarised light.
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What is an enantiomer?
The two isomers of optical isomerism are called a pair of enantiomers.
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What is the Chiral centre marked with?
*
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How can you tell a Chiral carbon?
You can tell which carbon is chiral as it will have 4 different groups attached to it.
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What measures optical rotation?
Polarimeter
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What is light?
vibrating electric and magnetic fields which occur in all directions at right angles to the direction of the light wave.
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How do you cut away all but one vibration?
Pass it through a filter (polaroid)
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What does superimposed mean?
Can't be placed on top of each other
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What is a stereoisomer?
Compounds/molecules with same structural formula but with bonds/atoms/groups arranged differently in space or in 3D
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Other cards in this set

Card 2

Front

What is Optical Isomerism?

Back

When 4 different elements attach to one Carbon. 2 identical isomers are created but cant be superimposed. Optical isomers rotate the plane of polaration of polarised light indifferent ways: + isomer rotates clockwise, - isomer rotates anticlockwise

Card 3

Front

What is a racemic mixture?

Back

Preview of the front of card 3

Card 4

Front

What is an enantiomer?

Back

Preview of the front of card 4

Card 5

Front

What is the Chiral centre marked with?

Back

Preview of the front of card 5
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