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Halogenoalkanes
General formula = C
nH2n+1X


X is a halogen, it's slightly ­ve.
Halogenoalkanes are polar.
The curly arrow shows the movement of the free pair of electrons.

Nucleophile ­ electron donor pair
It replaces X.

:OH = Hydroxide ion and it makes an alcohol
:NH3 = Ammonia and it…

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Elimination Reaction ­
Potassium Hydroxide (alcoholic) + Halogenoalkane Alkane + H2O


KOH acts as a base.
Tertiary halogenoalkanes tend towards elimination.






Free radical substitution ­
Free radical ­ atom either on its own or part of a molecule which has free
electrons ready to form a covalent bond.
Overall Equation…

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