1941810
Description
Mind Map by Pia Ricioppo, updated more than 1 year ago
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Created by Pia Ricioppo
almost 10 years ago
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elimination reaction of haloalkanes
- the reagent for this reaction is ALCOHOLIC sodium or potassium hydroxide.
- the conditions need to be reflux in alcoholic solution.
- the product produced is an ALKENE.
- for example bromopropane and sodium hydroxide...
- key points
- OH- acts as a base (proton acceptor)
- protons come from carbon or the hydrogen ion next
to the carbon bonded with halogen
- electron pair moves to form a second bond (double bond)
between the carbon atom
- the halogens displaced
- overall theres an elimination of HBR
- overall theres an elimination of HBR
- the halogens displaced
- electron pair moves to form a second bond (double bond)
between the carbon atom
- protons come from carbon or the hydrogen ion next
to the carbon bonded with halogen
- OH- acts as a base (proton acceptor)
- what decides whether you get
an elimination or a
substituition?
- one very important factor is the type of haloalkane...
- primary
- mainly substituition
- mainly substituition
- secondary
- substituition and eliminaion
- substituition and eliminaion
- teritary
- mainly elimination
- mainly elimination
- primary
- the solvent
- the proportion of solvent to ethanol MATTERS.
- water encourages substituition
- ethanol encourages elimination
- water encourages substituition
- the proportion of solvent to ethanol MATTERS.
- higher temperatures encourage elimination.
- concentration of sodium or
potassium hydroxide solution
- higher concentrations favour elimination
- higher concentrations favour elimination
- one very important factor is the type of haloalkane...
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