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Does Cyclohexene has a lower boiling point than either cyclohexanol?
Wiki User
∙ 9y ago
Yes, cyclohexene has lower boiling point than cyclohexanol (and cyclohexane as well)
Wiki User
∙ 9y ago
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How cyclohexene mignt be formed as a byproduct in the synthesis of cyclohexanone?
One of the common ways to synthesize ketones is by oxidizing secondary alcohols. Cyclohexanone can be easily prepared from cyclohexanol (or hydroxycyclohexane - same thing) by allowing cyclohexanol to react with potassium dichromate (K2Cr2O7) in the presence of acid. However, some of the cyclohexanol will undergo an elimination reaction because of the acid present and form cyclohexene. Your question is a good example of why it is often important to consider how the reactants should be mixed to get the best results. You would not want to add all of the cyclohexanol to the dichromate solution since performing the reaction that way would maximize the percentage of cyclohexene formed. To limit the extent of the competing elimination reaction, one would want to: 1) Look up the oxidation of secondary alcohols to ketones using potassium dichromate in the literature in order to a. determine the amount of acid needed, and don't use more acid than is necessary, and b. try to find the optimum temp. at which to carry out the reaction. The lower the acid concentration, the less cyclohexene that will be formed. 2) Slowly add the alcohol to a rapidly stirring mixture of an aqueous solution of acidified potassium dichromate. 3) An aqueous solution of acidified potassium dichromate will get warm when it is prepared. It would be best to allow it to cool back to room temp. before beginning the reaction. Once the ketone is formed, it will not react further with acidic dichromate because ketones are difficult to oxidize and dichromate is not a strong enough oxidizer.
How might a lower boiling point affect people who go camping in the mountains?
The time for boiling is lower.
Which has a lower boiling point butane or water?
benzene has lower boiling point than water
Does Increasing the pressure of a liquid lower its boiling point?
The boiling point of a liquid increases when atmospheric pressure is increased.
What does the boiling of salt water compare to the boiling point of fresh water?
The boiling point of freshwater is lower than the boiling point of saltwater.
How cyclohexene mignt be formed as a byproduct in the synthesis of cyclohexanone?
One of the common ways to synthesize ketones is by oxidizing secondary alcohols. Cyclohexanone can be easily prepared from cyclohexanol (or hydroxycyclohexane - same thing) by allowing cyclohexanol to react with potassium dichromate (K2Cr2O7) in the presence of acid. However, some of the cyclohexanol will undergo an elimination reaction because of the acid present and form cyclohexene. Your question is a good example of why it is often important to consider how the reactants should be mixed to get the best results. You would not want to add all of the cyclohexanol to the dichromate solution since performing the reaction that way would maximize the percentage of cyclohexene formed. To limit the extent of the competing elimination reaction, one would want to: 1) Look up the oxidation of secondary alcohols to ketones using potassium dichromate in the literature in order to a. determine the amount of acid needed, and don't use more acid than is necessary, and b. try to find the optimum temp. at which to carry out the reaction. The lower the acid concentration, the less cyclohexene that will be formed. 2) Slowly add the alcohol to a rapidly stirring mixture of an aqueous solution of acidified potassium dichromate. 3) An aqueous solution of acidified potassium dichromate will get warm when it is prepared. It would be best to allow it to cool back to room temp. before beginning the reaction. Once the ketone is formed, it will not react further with acidic dichromate because ketones are difficult to oxidize and dichromate is not a strong enough oxidizer.
How the bolling point of methanol can be reduces?
You can either pressurize it or add to it another liquid with a lower boiling point.
How might a lower boiling point affect people who go camping in the mountains?
The time for boiling is lower.
Which has a lower boiling point butane or water?
benzene has lower boiling point than water
Does HCl a lower boiling point than either HF or HBr?
Yes, it is true: -85,1 0C at 1, 013 bar.
How does abnormally low pressure affect the boiling point of a compound?
lower pressure means a lower boiling point.
Does Increasing the pressure of a liquid lower its boiling point?
The boiling point of a liquid increases when atmospheric pressure is increased.
Goes salt lower boiling temperature of water?
Salt will lower the melting point, and raise the boiling point of water.
Does ethanol has the lower boiling point?
It depends what chemical or compound you are comparing the boiling point to. Ethanol has an atmospheric pressure boiling point of 78.1 °C (172.6 °F). This is slightly lower than the boiling point of water at the same pressure, much lower than the boiling point of iron, much higher than the boiling point of bromine.
What happens to water if you lower its pressure?
you lower its boiling point.
How does the boiling point of saltwater compare to the boiling point of freshwater?
The boiling point of freshwater is lower than the boiling point of saltwater.
What is the effect of pressure on boiling?
Lowering the pressure the boiling point is also lower.
