Stereoisomerism

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

Card 3

Front

What is a racemic mixture?

Back

Card 4

Front

What is an enantiomer?

Back

Card 5

Front

What is the Chiral centre marked with?

Back

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Stereoisomerism