Flashcards
phenol structure and reactions
Cards in this deck (12)
- 1Phenol, what is it- An OH group attached to
- 2structure of phenol- Phenol is more reactive than benzene, therefore more likely to go under electrophilic substitution reaction ( more likely to donate
- The lone pair becomes part of the delocalisation increasing the electron density in the ring.
- Oxygen becomes partially delocalised over the benzene ring - 3uses of phenol- Asprin
- Dyes
- Disinfectants - 4Equation to show phenol partially dissociating in water
- 5Phenol and (sodium) Hydroxide - a strong base- This is a neutralisation reaction
- 6Phenol and (sodium) metal- This is a metal acid reaction
- 7Does Phenol react with carbonates?No
- Phenol is not a strong enough acid to react with carbonates ( a weak base)
- No CO2 is produced by this reaction therefore can be used to test the presence of phenol - 8Bromination Reaction - equation - name of product - observationequation
C6H5OH + 3Br2 -> C6H2Br2OH + 3HBr
name of product
2,4,6 - tribromophenol (white solid)
what would you see
precipitate
decolorisation of bromine, brown- >colourless - 9why is Phenol more susceptible to halogenation- Higher e- density because f the partially delocalised system over oxygen
- 10what are the Electron Donating Groups- Electron donating groups include -OH and -NH2, these are groups that attach directly to the benzene ring
- They have electrons in orbital that ovary with the delocalised ring and increases the electron density
- They donate e- onto ring
- Reactivity increases
- 2nd substitution at 2,4,6 - 11what are Electron Withdrawing Groups- They include NO2
- It does that orbitals that van overlap with the delocalised ring and its electronegative, so it withdraws e- density from the ring
- They withdraw e- from ring
- Reactivity decreases
- 2nd substitution at 3,5 - 12Nitration
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- A-Level Chemistry (a2 module 6) Flashcards on phenol structure and reactions, created by Hina Nagano on 16/10/2016.
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- Hina Nagano
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