Chemistry AS CI 3.3

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  • Created by: A.B.
  • Created on: 30-11-13 15:46
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  • Structural Isomerism
    • SAME molecular formula, DIFFERENT structural formula
    • 3 Different types of structural isomerism
      • Chain Isomerism
        • Chain lengths are different
        • Often seen in alkanes
      • Positional Isomerism
        • Same functional group appears in different positions
        • Often seen in alcohols
      • Functional group isomerism
        • Molecular formula same, functional group different
        • Seen in alcohols and ethers
    • Isomerisation in the oil refinery
      • When straight-chained alkanes are heated in the presence of a catalyst, they become branched alkanes.
        • Branched-chain alkanes have a higher octane number (less tendency to auto ignite).


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