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Why alkenes undergo nucleophilic addition reaction while simple alkanes do not?
Wiki User
∙ 11y ago
Alkenes have pi bonds that are readily available to react because the strength of a pi bond isn't as strong as a sigma bond. Pi electrons will attack the nucleophile to form the respective carbocation. Alkanes only contain sigma bonds and have no pi electrons to attack a nucleophile. In order for an alkane to become a strong enough nucleophile it must not be sterically hindered (primary carbons prefered to tertiary) and most likely deprotenated by a very strong base ( likely stronger than sodium amide ).
Wiki User
∙ 11y ago
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What type of reaction is exhibited by alkenes?
Alkynes undergo many addition reactions such as: catalytic hydrogenation, addition by electrophilic reagents, hydration with tautomerism, hydroboration reactions, and oxidations. They also undergo nucleophilic addition reactions & reduction. Finally alkynes are the strongest bronsted acids made from only hydrocarbons.
Is the conversion of an alkene to an alkane a reduction or an oxidation?
The addition of hydrogen on alkenes produces the alkanes so it is a reduction process.
How bromine water can be used to test for an alkene?
Alkenes, or hydrocarbons with at least one double bond undergo an addition reaction when combined with bromine (Br2). The general reaction is H2C=CH2 --> H2BrC--CBrH2, and it occurs readily. This reaction is a good way to identify alkenes because bromine has a reddish color, while alkanes and alkenes are colorless. So if bromine is added to an unknown hydrocarbon, the disappearance of the color is an indication of the presence of a pi bond.
What is the difference between the carbon groups called alkanes and alkenes?
Alkenes have at least one double bond between two carbon atoms; alkanes don't.
When alkenes undergo addition reaction what kind of bond does it produce?
Single bond
Why alkanes do not react with bromine water?
No, bromine will only add to alkenes, so NO addition reaction to alkanes. Subtitution on alkanes is not possible at standard conditions
What type of reaction is exhibited by alkenes?
Alkynes undergo many addition reactions such as: catalytic hydrogenation, addition by electrophilic reagents, hydration with tautomerism, hydroboration reactions, and oxidations. They also undergo nucleophilic addition reactions & reduction. Finally alkynes are the strongest bronsted acids made from only hydrocarbons.
What come from crude oil alkanes or alkenes?
alkanes
Is halogenation of alkanes a nucleophlic or electrophlic mechanism?
alkenes are neutral nucleofiles they undergoes electrophilic addition reactions.
How can bromine water test the difference between alkanes and alkenes?
Bromine water can test the difference between alkanes and alkenes because the bromine water turns colourless for the alkenes but doesnt change for the alkanes.
Is the conversion of an alkene to an alkane a reduction or an oxidation?
The addition of hydrogen on alkenes produces the alkanes so it is a reduction process.
What is the difference of alkanes and alkenes?
Alkanes are saturated hydrocarbons. Alkenes are unsaturated hydrocarbons with atleast one carbon-carbon double bond.
What differentiates alkenes from alkanes?
alkanes have single covalent bons, alkenes have double :) lol did this while doing chem homework myself
What are some examples of alkanes and alkenes?
Saturated oils and waxes are all types of alkanes and alkenes The Ice man ;) Call me ladies... ;')
Why alkenes undergo nucleophilic addition reaction while simple alkenes do not?
Alkenes have pi bonds that are readily available to react because the strength of a pi bond isn't as strong as a sigma bond. Pi electrons will attack the nucleophile to form the respective carbocation. Alkanes only contain sigma bonds and have no pi electrons to attack a nucleophile. In order for an alkane to become a strong enough nucleophile it must not be sterically hindered (primary carbons prefered to tertiary) and most likely deprotenated by a very strong base ( likely stronger than sodium amide ).
How bromine water can be used to test for an alkene?
Alkenes, or hydrocarbons with at least one double bond undergo an addition reaction when combined with bromine (Br2). The general reaction is H2C=CH2 --> H2BrC--CBrH2, and it occurs readily. This reaction is a good way to identify alkenes because bromine has a reddish color, while alkanes and alkenes are colorless. So if bromine is added to an unknown hydrocarbon, the disappearance of the color is an indication of the presence of a pi bond.
How are alkenes made from alkanes?
cracking maybe?
