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Experiment 7: Dehydration of Cyclohexanol
Terms in this set (15)
In the following experiment the alcohol, cyclohexanol, will be converted into an __________ by elimination of water.
The change in functionality from the alcohol to the alkene can be detected by performing examining its reactivity with molecular __________.
When an alcohol is heated in the presence of an __________ catalyst, the elements of a molecule of water may be eliminated, and a carbon-carbon double bond formed.
The mechanism of the reaction is believed to involve a stepwise process in which __________ are intermediates.
1) Protonation of the alcohol (an acid-base reaction involving one of the unshared electron pairs on the oxygen atom of the alcohol). This gives an alkyl oxonium ion.
2) Loss of water to give a carbocation
3) Deprotonation and double bond formation
The function of the acid is to facilitate the dissociation of the __________ bond.
__________ principal will be used to maximize the yield of the product by removing one of the products as rapidly as it is formed.
The choice of phosphoric acid, rather than other common acids is based on the fact that the phosphate counter ion is __________, which minimizes substitution pathways.
What is the function of the acid used in the reaction? Why is only a small amount of it needed?
The acid is used to provide the proton need which is released later on. Therefore, only a small quantity of acid is required for the reaction to go to completion.
After the Baeyer test, add the reaction mixture to the ____________________ waste container.
Cyclohexanol has a higher boiling point than cyclohexene due to ___________________.
intermolecular hydrogen bonding
How does acid accelerate the rate of this week's reaction?
by creating a good leaving group
Classify the product of this reaction's alcohol dehydration.
In this experiment, phosphoric acid is best classified as a(n) ______________.
What percentage of phosphoric acid was used in this experiment?
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