What mechanisms do I NEED to know for EDEXCEL Paper 2 Organics?

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R2-D2
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Hi,
Revising for tomorrow's paper.
Can someone compile a list for the mechanisms that I MUST know for paper 2 tomorrow? Not sure which ones I need to know
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KomradeKorbyn
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Too late now but for paper 3 (and people reading this for next year) the mechanisms you need to learn for organic are:

* electrophilic addition of halogens or hydrogen halides with alkenes

* nucleophilic substitution of ammonia + halogenoalkanes

* nucleophilic substitution of hydroxide ions + halogenoalkanes (split up into SN1 and SN2 if you're past year 1)

* nucleophilic addition of "HCN in the presence of KCN" + carbonyl compounds

* electrophilic substitution of benzene ring + halogen/halogenoalkane/acyl chloride/conc nitric acid+conc sulfuric acid
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