Organic Chemistry : Other Reactions

Study concepts, example questions & explanations for Organic Chemistry

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Example Questions

Example Question #11 : Help With Other Named Reactions

Screen shot 2015 12 21 at 10.02.31 pm

Which of the following is the correct IUPAC name for the compound given?

Possible Answers:

E-4-methyl-2-octene

E-5-methyl-2-octene

Z-4-methyl-2-octene

Z-5-methyl-2-octene

Correct answer:

Z-4-methyl-2-octene

Explanation:

The compound given has an alkene functional group and the longest hydrocarbon chain containing the double bond will be used as the parent chain. Below is how the compound given should be numbered:

Screen shot 2015 12 21 at 10.16.52 pm

We must use the E, Z system of naming alkenes that assigns priority to substituents on the  based on atomic number. This compound must be labeled with a Z geometry because the substituents with the higher priority are on the same side. Because a methyl group is on the 4th carbon atom on the parent chain, we must add the name 4-methyl to the naming of this compound. Therefore the answer is Z-4-methyl-2-octene.

Example Question #12 : Help With Other Named Reactions

Screen shot 2015 12 21 at 10.02.44 pm

Which of the following is the correct IUPAC name for the compound given?

Possible Answers:

Z-5-methyl-2-heptene

E-5-methyl-2-heptene

E-3-methyl-2-heptene

Z-3-methyl-2-heptene

Correct answer:

E-5-methyl-2-heptene

Explanation:

The compound given has an alkene functional group and the longest hydrocarbon chain containing the double bond will be used as the parent chain. Below is how the compound given should be numbered:

Screen shot 2015 12 21 at 10.36.47 pm

We must use the E, Z system of naming alkenes that assigns priority to substituents on the  based on atomic number. This compound must be labeled with an E geometry because the substituents with the higher priority are on opposite sides. Because a methyl group is on the 5th carbon atom on the parent chain, we must add the name 5-methyl to the naming of this compound. Therefore the answer is E-5-methyl-2-heptene.

Example Question #13 : Help With Other Named Reactions

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What is the starting organic compound that was reacted with  to yield the given product?

Possible Answers:

Screen shot 2015 12 31 at 10.53.50 am

Screen shot 2015 12 31 at 10.53.32 am

Screen shot 2015 12 31 at 10.53.39 am

Screen shot 2015 12 31 at 10.53.44 am

Correct answer:

Screen shot 2015 12 31 at 10.53.39 am

Explanation:

Screen shot 2015 12 31 at 11.00.06 am

Example Question #11 : Other Reactions

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What is the starting organic compound that was reacted with  to yield the given product?

Possible Answers:

Screen shot 2015 12 31 at 10.45.06 am

Screen shot 2015 12 31 at 10.45.14 am

Screen shot 2015 12 31 at 10.45.43 am

Screen shot 2015 12 31 at 10.45.21 am

Correct answer:

Screen shot 2015 12 31 at 10.45.43 am

Explanation:

Screen shot 2015 12 31 at 11.04.08 am

Example Question #41 : Specific Reactions And Named Reactions

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What is the product of the based induced chemical reaction given?

Possible Answers:

Screen shot 2016 01 17 at 1.56.58 pm

Screen shot 2016 01 17 at 1.56.53 pm

Screen shot 2016 01 17 at 1.57.02 pm

Screen shot 2016 01 17 at 1.57.09 pm

Correct answer:

Screen shot 2016 01 17 at 1.57.02 pm

Explanation:

The hydrogen bonded to the alpha carbon on carbonyl compounds is weakly acidic and when reacted with a strong base can deprotonate forming an enolate ion which has two resonance structures as shown below:

Screen shot 2016 01 17 at 1.52.51 pm

Example Question #11 : Other Reactions

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What is the product of the base induced chemical reaction given?

Possible Answers:

Screen shot 2016 01 17 at 1.46.24 pm

Screen shot 2016 01 17 at 1.46.20 pm

Screen shot 2016 01 17 at 1.46.29 pm

Screen shot 2016 01 17 at 1.46.07 pm

Correct answer:

Screen shot 2016 01 17 at 1.46.07 pm

Explanation:

The hydrogen bonded to the alpha carbon on carbonyl compounds is weakly acidic and when reacted with a strong base can deprotonate forming and enolate ion which has two resonance structures as shown below:

 

Screen shot 2016 01 17 at 1.45.50 pm

Example Question #11 : Other Reactions

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What is the product of the reaction given?

Possible Answers:

Screen shot 2016 01 17 at 1.26.19 pm

Screen shot 2016 01 17 at 1.26.43 pm

Screen shot 2016 01 17 at 1.26.30 pm

Screen shot 2016 01 17 at 1.26.06 pm

Correct answer:

Screen shot 2016 01 17 at 1.26.06 pm

Explanation:

In the reaction below, a ketone is protonated by a strong acid. This triggers the deprotonation of the weakly acidic hydrogen bonded to the alpha carbon by a chloride ion and formation of an alkene functional group.Screen shot 2016 01 17 at 1.25.40 pm

Example Question #671 : Organic Chemistry

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What is the product of the reaction given?

Possible Answers:

Screen shot 2016 01 17 at 1.00.01 pm

Screen shot 2016 01 17 at 12.59.54 pm

Screen shot 2016 01 17 at 1.00.06 pm

Screen shot 2016 01 17 at 1.00.12 pm

Correct answer:

Screen shot 2016 01 17 at 12.59.54 pm

Explanation:

In the reaction below, a ketone is protonated by a strong acid. This triggers the deprotonation of the weakly acidic hydrogen bonded to the alpha carbon by a bromide ion and formation of an alkene functional group.

Screen shot 2016 01 17 at 1.00.53 pm

Example Question #681 : Organic Chemistry

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What is the starting organic compound that was reacted with hydrochloric acid to yield the given product?

Possible Answers:

Screen shot 2016 01 17 at 12.22.16 pm

Screen shot 2016 01 17 at 12.22.49 pm

Screen shot 2016 01 17 at 12.22.35 pm

Screen shot 2016 01 17 at 12.22.23 pm

Correct answer:

Screen shot 2016 01 17 at 12.22.49 pm

Explanation:

Screen shot 2016 01 17 at 12.21.47 pm

Example Question #682 : Organic Chemistry

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What is the starting organic compound that was reacted with hydrobromic acid to yield the given product?

Possible Answers:

Screen shot 2016 01 17 at 12.11.01 pm

Screen shot 2016 01 17 at 12.10.48 pm

Screen shot 2016 01 17 at 12.11.07 pm

Screen shot 2016 01 17 at 12.10.53 pm

Correct answer:

Screen shot 2016 01 17 at 12.10.53 pm

Explanation:

Screen shot 2016 01 17 at 12.10.33 pm

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