How can we convert 1-hexene to cis-3-octene using alkynes as intermediates?

In summary, an alkyne is a hydrocarbon with a triple bond between two carbon atoms, while an alkene is a hydrocarbon with a double bond between two carbon atoms. An alkyne can be converted to an alkene through a process called hydrogenation, and some common methods for synthesizing alkenes include dehydration of alcohols, elimination reactions of halides, and Wittig reactions. The purpose of converting an alkyne to an alkene is to create new carbon-carbon double bonds and increase stability. Alkenes can also be converted back to alkynes through a process called dehydrohalogenation.
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whatlifeforme
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Organic: Alkene to Alkyne

I am trying to do a synthesis of 2-Octyne from 1-heptene. Conversion of the triple bond to a double bond is pretty easy, but i also have to add an alkyl group, and the double bond must remain on the original triple bond location.

Thus, so far thoughts:
1. remove hydrogens from double bond

2. add ch3 to terminal carbon to replace hydrogen.
CH3-BR ?

Question 2: Propose a synthesis of cis-3-octene starting from 1-hexene.
 
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You need to review the http://courses.chem.indiana.edu/c341/documents/C341S2010CH7Alkynes.pdf"
 
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Related to How can we convert 1-hexene to cis-3-octene using alkynes as intermediates?

1. What is the difference between an alkyne and an alkene?

An alkyne is a hydrocarbon with a triple bond between two carbon atoms, while an alkene is a hydrocarbon with a double bond between two carbon atoms. This means that alkynes have two fewer hydrogen atoms than the corresponding alkene.

2. How can an alkyne be converted to an alkene?

An alkyne can be converted to an alkene through a process called hydrogenation, where the triple bond is broken and replaced with a double bond. This reaction requires a catalyst, such as palladium or platinum, and a source of hydrogen gas.

3. What are some common methods for synthesizing alkenes?

Some common methods for synthesizing alkenes include dehydration of alcohols, elimination reactions of halides, and Wittig reactions. Other methods include the addition of water to alkenes and the reduction of alkynes.

4. What is the purpose of converting an alkyne to an alkene?

Converting an alkyne to an alkene can be useful in organic synthesis because it allows for the creation of new carbon-carbon double bonds, which can be used to create more complex molecules. Additionally, alkynes are more reactive than alkenes, so converting them to alkenes can make them more stable.

5. Can alkenes be converted back to alkynes?

Yes, alkenes can be converted back to alkynes through a process called dehydrohalogenation. This reaction involves the removal of a hydrogen atom from the alkene and a halogen atom from a separate molecule, resulting in the reformation of a triple bond between two carbon atoms.

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