Aromatic compounds

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  • Created by: Sopha8
  • Created on: 29-12-14 14:53
What is the formula of benzene?
C6H6
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Give reasons why Kekule's model of benzene is incorrect
1-x ray shows all bond lengths are the same not 3 C-C and 3 C=C. 2- wont undergo addition reactions (if correct it would due to double bonds) 3- Hhydrogentation is less than predicted ring of delocalised electrons makes it more stable than kekules
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what other functional groups would be attached to the benzene for it to have a Phenly- prefix?
called that when benzene is not main functional group, either alcohol, ketone, alkene or amine is attached
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when is the benzene- suffix used?
when benzene is main functional group, when: chlorides, nitrates or methyl groups are attached
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Draw the general mechanism for the electrophilic substitution of benzene
:
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What are the conditions of a nitration reaction? What is the equation to produce the elctrophile needed?
conditions- warm benzene with conc nitric acid and conc sulfuric acid (as a catalyst). HNO3 + H2SO4------>HSO4 + NO2+ (electrophile) + H2O
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What are the products of Nitration and Friedel-Crafts Acylation reactions?
nitration= Nitrobenzene for explosives and dyes, Freidel= Phenylketones for pharmaceutical uses and dyes
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What is the strong electropihile used in Friedel-Crafts Acylation reaction? draw the mechanism for how its produced
its a carbocation.
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Other cards in this set

Card 2

Front

Give reasons why Kekule's model of benzene is incorrect

Back

1-x ray shows all bond lengths are the same not 3 C-C and 3 C=C. 2- wont undergo addition reactions (if correct it would due to double bonds) 3- Hhydrogentation is less than predicted ring of delocalised electrons makes it more stable than kekules

Card 3

Front

what other functional groups would be attached to the benzene for it to have a Phenly- prefix?

Back

Preview of the front of card 3

Card 4

Front

when is the benzene- suffix used?

Back

Preview of the front of card 4

Card 5

Front

Draw the general mechanism for the electrophilic substitution of benzene

Back

Preview of the front of card 5
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