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Nucleophilic Substitution Reactions

Relative bond strengths of halogenoalkanes in kJ mol1:
In all Nucleophilic substitution reactions the carbonhalogen bond must be
broken. It is quite clear from the bond strengths which reactions will be
faster and which will barely happen at all.
Therefore the general trend is that the lower…

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formed which is much more energetically unstable.

This mechanism differs from the previous one as the positive carbon atom is blocked by the methyl
groups that are joined onto it as shown:

As a result a different
mechanism occurs that is much
slower than an SN2 reaction.

What happens…

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Reflux is the process of boiling reactants while continually cooling the vapor
returning it back to the flask as a liquid

Tom Baker 12ST1 Chemistry


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