Organic Chemistry : Hydrocarbon Products
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Example Questions
Example Question #4 : Help With Alkene Synthesis
What is the major product for the reaction given?
The reason this is the major product is because on tertiary alcohols are best dehydrated based on the E1 mechanism below:
Example Question #5 : Help With Alkene Synthesis
What is the major product for the reaction given?
The reason this is the major product is because tertiary alcohols are best dehydrated based on the E1 mechanism below:
Example Question #1 : Help With Alkene Synthesis
What is the major product for the reaction given?
Below is the mechanism for the reaction given to form the alkene:
Example Question #1 : Alkyne Chemistry
What is the best reagent for abstracting a hydrogen from ethyne?
None of these
The triple bond in ethyne makes the hydrogens slightly more acidic than those found in ethane. A very strong base, such as the conjugate base of ammonia, would be able to abstract that hydrogen. The abstraction turns the base into ammonia. It also creates a carbanion that can be used for chain extension and alkyne synthesis.
Example Question #1 : Functional Group Reactions
What is the product of the compound when it reacts with two equivalents of base?
None of these
2-pentene
2-pentyne
1-pentene
1-pentyne
2-pentyne
For each equivalent of base, a pi bond is formed between the carbons initially bound to the bromine atoms. For each bond formed, a bromine leaving group leaves the hydrocarbon. One equivalent of base abstracts a hydrogen. The electrons from the bond to the hydrogen create a pi bond. This occurs twice, and a triple bond is formed. The result is a 5-carbon chain with a triple bond between the second and third carbons. This molecule is 2-pentyne.
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