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Alkene → Halogenoalkane             (e.g. HBr)

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Alkene → Halogenoalkane             (e.g. HBr)

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Reagent = HBr (or any polar halogen molecule)
Conditions = Standard conditions
Type = Electrophilic addition

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Reagent = Br₂ (or any halogen)

Conditions = Standard conditions

Type = Electrophilic addition

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Reagent = H₂O (gaseous)

Conditions = 60 atmospheres of pressure, 300°c

Type = Addition/hydration          (due to the addition of steam (gaseous water))

# data[].attributes.body
Reagent = Hydrogen gas (H ₂)

Conditions = Heat (largely variable, but ~150°c) and a nickel catalyst

Type = Addition/hydrogenation      (due to the addition of hydrogen)

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An electrophile is a species that attacks an electron rich region, especially the pi bond of a C=C bond in the context of organic chemistry.

Since they are attracted to negatively charged areas due to the high proportion of electrons, electrophiles must be positively charged or partially positively charged.