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Which one gives a faster reaction with bromine, alkene or alkyne?
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Mina Laban
Which one gives a faster reaction with bromine, alkene or alkyne?
This bromination reaction is an electrophilic addition. The transition state formed after the attack of the bromine molecule on the pi cloud system involves some carbocation character developing on one of the two carbons involved in the multiple bond. For alkynes, this partial carbocation is of a vinylic type which is less stable than the regular alkyl cations involved in the alkene reactions. Therefore, the alkyne would be a bit less reactive than the alkene.
This bromination reaction is an electrophilic addition. The transition state formed after the attack of the bromine molecule on the pi cloud system involves some carbocation character developing on one of the two carbons involved in the multiple bond. For alkynes, this partial carbocation is of a vinylic type which is less stable than the regular alkyl cations involved in the alkene reactions. Therefore, the alkyne would be a bit less reactive than the alkene.
The process is an electrophilic addition and sp hibridization carbons are more nucleophilic than sp2 carbons.
Always think in this way when considering which organic compound will present a faster reaction. If the reaction is nucleophilic, the lower the electronic density around that carbon, the faster the reaction will be; and exactly the opposite for electrophilic reactions. Look at the carbon itself and to the groups that are attached to it.
The process is an electrophilic addition and sp hibridization carbons are more nucleophilic than sp2 carbons.
Always think in this way when considering which organic compound will present a faster reaction. If the reaction is nucleophilic, the lower the electronic density around that carbon, the faster the reaction will be; and exactly the opposite for electrophilic reactions. Look at the carbon itself and to the groups that are attached to it.
This bromination reaction is an electrophilic addition. The transition state formed after the attack of the bromine molecule on the pi cloud system involves some carbocation character developing on one of the two carbons involved in the multiple bond. For alkynes, this partial carbocation is of a vinylic type which is less stable than the regular alkyl cations involved in the alkene reactions. Therefore, the alkyne would be a bit less reactive than the alkene.
This bromination reaction is an electrophilic addition. The transition state formed after the attack of the bromine molecule on the pi cloud system involves some carbocation character developing on one of the two carbons involved in the multiple bond. For alkynes, this partial carbocation is of a vinylic type which is less stable than the regular alkyl cations involved in the alkene reactions. Therefore, the alkyne would be a bit less reactive than the alkene.
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The process is an electrophilic addition and sp hibridization carbons are more nucleophilic than sp2 carbons.
Always think in this way when considering which organic compound will present a faster reaction. If the reaction is nucleophilic, the lower the electronic density around that carbon, the faster the reaction will be; and exactly the opposite for electrophilic reactions. Look at the carbon itself and to the groups that are attached to it.
The process is an electrophilic addition and sp hibridization carbons are more nucleophilic than sp2 carbons.
Always think in this way when considering which organic compound will present a faster reaction. If the reaction is nucleophilic, the lower the electronic density around that carbon, the faster the reaction will be; and exactly the opposite for electrophilic reactions. Look at the carbon itself and to the groups that are attached to it.
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