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Unit5 edexcel CHEMISTRY watch

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    hey guys...
    in the organic part on unit5, could some1 explain to me whats meant by SN1 and SN2 reactions??...help!!!
    thanxxx
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    This is what I posted in a previous post:

    A brief description of what i think they are;

    SN1 means one reactant appears in the rate equation so the rate depends on the concetration only one reactant.
    eg the formation of a carbocation or the formation of an electrophile.

    SN2 means two reactants appear in the rate equation so the rate depends on the concentration of two reactants. Meaning a transistion state is formed and that the formation of it is the rate determining step.

    I hope that makes sense.
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    Sn1 - 1st order nucleophilic substitution (usually tertiary halogenoalkanes)

    Sn2 - 2nd order nucleophilic substitution (usually primary halogenoalkanes)
 
 
 
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