ISOMERISM

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5 Terms

1
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What is optical isomerism?

occurs in carbon compounds with 4 different groups of carbons attached to a carbon (a chiral carbon)

2
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What’re 2 compounds that are optical isomers of each other called?

enantiomers which are non-superimposable mirror images

3
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What is a racemic mixture?

  • a mixture containing 50/50 enantiomers

  • will not rotate plane-polarised ligh

4
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What is the difference between the 2 different types of enantiomers?

  • they rotate plane polarised light in different directions

  • one enantiomer rotates it in one direction and the same rotates it in the same amount in the opposite direction

5
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How is a racemate formed?

  • in a reaction mechanism when a reactant or intermediate has a trigonal planar group in the molecule is approached from both sides by an attacking species

  • there is equal chance of both sides being attacked