Question 1

Give the product(s)of the reaction: CH₂=CHCH₃ + HCl → product(s)

Accepted Answer

The HCl will react with the CH₂ to form CHCl and H₂. This will result in the formation of CH₃CHCl, which is the product. No other products are formed in this reaction, making choice C the correct answer.

Question 2

Oxidation of the following alcohol via the conditions below yields spearmint oil.What new functional group is formed in the reaction to yield spearmint?

Accepted Answer

The oxidation of an alcohol to yield a ketone is known as a secondary alcohol oxidation. As a result, spearmint oil includes a ketone functional group. Therefore, option C, ketone, is the best response. Option A, aldehyde, is incorrect because aldehydes are created when primary alcohols are oxidised. Option B, carboxylic acid, is incorrect because it requires further oxidation of the ketone to a carboxylic acid. Option D, amine, and option E, ester, are incorrect because neither is formed during the oxidation of an alcohol.

Question 3

Predict the major product for the reaction: 
1-butene + HI →

Accepted Answer

The reaction between 1-butene and HI follows Markovnikov's rule, where the hydrogen atom from HI adds to the carbon with the greater number of hydrogen atoms, and the iodine adds to the other carbon atom. This results in the formation of 2-iodobutane.

Question 4

Suggest reagents for the synthesis of meta-chloronitrobenzene from nitrobenzene.

Accepted Answer

The correct reagents for directing a substituent to the meta position in nitrobenzene are Cl₂ and AlCl₃. AlCl₃ is a Lewis acid that facilitates electrophilic aromatic substitution, and the presence of a nitro group (-NO₂) on benzene directs new substituents to the meta position.

Question 5

Predict the major product for the reaction: 
2-methyl-2-pentene + HCl →

Accepted Answer

The reaction is an electrophilic addition of HCl to the alkene. The more stable carbocation forms at the tertiary carbon, leading to the major product where Cl attaches to the more substituted carbon.

Question 6

What is the major product in the following transformation?

Accepted Answer

The answer of What is the major product in the...

Question 7

Lindlar's catalyst is used when ________.

Accepted Answer

Lindlar's catalyst is specifically used to selectively reduce alkynes to Z alkenes, not fully to alkanes, making it a tool for partial hydrogenation.

Question 8

What alkene(s)would be produced in the following reaction?

Accepted Answer

The given reaction is a dehydration reaction of an alcohol. This specific alcohol has one methyl group and one ethyl group on a secondary carbon. The dehydration reaction of this alcohol would result in the elimination of a water molecule and the formation of two possible alkene products: 2-methyl-2-butene and 3-methylbutene. Therefore, the best choice is E since both alkene products are possible.

Question 9

Predict the major product for the reaction: 
2-methyl-2-butene + HBr →

Accepted Answer

Markovnikov's rule predicts the major product to be (CH3)2CBrCH2CH3.

Question 10

Identify the product for the following reaction:

Accepted Answer

The answer of Identify the product for the following reaction:...

Question 11

The common general anesthetic neothyl can be produced by the following dehydration reaction.What is the systematic name of neothyl? CH₃CH₂CH₂OH + CH₃OH ?

Accepted Answer

The answer of The common general anesthetic neothyl can be...

Question 12

Predict the major product for the reaction: CH₃C≡CH + 2 HBr →

Accepted Answer

The reaction of CH₃C≡CH with 2 equivalents of HBr will lead to the addition of HBr across the triple bond, resulting in the formation of CH₃CBr₂CH₃.

Question 13

What is the main product of the following reaction?

Accepted Answer

The given reaction is the substitution reaction of propyl alcohol with HBr in the presence of sulfuric acid. The product formed in this reaction is 2-bromopropane.

Question 14

Write down the rate law for E1 reactions (S is a substrate and B is a base).

Accepted Answer

E1 reactions are unimolecular and the rate-determining step involves only the substrate (S). The rate law for such reactions is proportional only to the concentration of the substrate, [S]. The concentration of the base, [B], does not affect the rate of the reaction once it has ionized the substrate to form a carbocation. Therefore, the correct rate law for E1 reactions is rate = k[S].

Question 15

Which are the most probable reactions and mechanisms in which tertiary haloalkanes participate? I.Substitution,S_N1 II.Substitution S_N2 III.Elimination E1 IV.Elimination E2 V.Addition

Accepted Answer

Tertiary haloalkanes typically undergo elimination reactions due to the hindrance around the carbon bearing the halogen, making substitution reactions less favorable. E1 and E2 mechanisms are both common for tertiary haloalkanes. Addition reactions are unlikely due to the lack of a suitable nucleophile, and SS1 and SS2 substitution reactions are less likely due to the steric hindrance. Therefore, only options I and V can be eliminated, leaving options II, III, and IV. Among these, option D includes E1 and E2 mechanisms, which are the most likely for tertiary haloalkanes.

Question 16

Order the following substrates according to the increase in S_N2 reaction rate: (CH₃)₂CHBr, (CH₃)₃CBr,CH₃CH₂Br,CH₃Br

Accepted Answer

The reaction rate increases with the increase in the electron-withdrawing ability of the substituent on the benzyl carbon. Among the given substrates, the electron-withdrawing ability follows the order: CBr > SMe > H. Hence, (CH₃)₃CBr, which has two CBr groups, has the highest reaction rate. (CH₃)₂CHBr, which has one CBr and one CHBr group, comes next in the order. CH₃CH₂Br, which has one CBr and one SMe group, has a still lower reaction rate. CH₃Br, which has only a CBr group, has the lowest reaction rate.

Question 17

Give the correct mathematical expression for the rate law for E2 reactions (S is a substrate and B is a base).

Accepted Answer

The rate of an E2 reaction depends on the concentration of both the substrate (S) and the base (B), hence the rate law is expressed as rate = k[S][B].

Question 18

When (CH₃)₃CBr reacts with CH₃ONa in methanol,two products are formed: a major one is an alkene and minor one is an ether.Identify the two products and by what mechanism(s)they are formed?

Accepted Answer

The reaction between CH₃CBr and CH₃ONa in methanol is a nucleophilic substitution reaction. The mechanism for this reaction is the SN2 mechanism, where the nucleophile (CH₃ONa) attacks the carbon atom attached to the leaving group (CBr) causing the leaving group to leave and the formation of a new bond between the nucleophile and the carbon atom. The major product formed is an alkene which is formed by the elimination of the leaving group (CBr) and a hydrogen atom on the neighboring carbon atom. This is a β-elimination reaction and follows the E2 mechanism, where the leaving group and the hydrogen atom are eliminated simultaneously from the molecule to form an alkene. The minor product formed is an ether which is formed by the attack of the nucleophile (CH₃ONa) on the carbon atom attached to the leaving group (CBr) followed by a second nucleophilic substitution reaction with methanol (CH₃OMe) present in the reaction medium. The mechanism for this reaction is SN2 followed by SN1, where the first nucleophilic substitution reaction results in the formation of an intermediate carbocation which then reacts with methanol to form the ether.

Question 19

Which of the following alcohols can eliminate water to produce alkene? I.phenol II.HOC(CH₃)₃ III.HOCH(CH₃)₂

Accepted Answer

Alcohols II and III can eliminate water to produce alkenes through a dehydration reaction, typically in the presence of an acid catalyst. Phenol (I) does not readily undergo such dehydration to form an alkene due to the stability of the aromatic ring.

Question 20

Give the product(s)of the reaction (in H₂SO₄): CH₂=CHCH₃ + H₂O → product(s)

Accepted Answer

The reaction is an acid-catalyzed hydration of propene, which follows Markovnikov's rule, resulting in the formation of isopropanol (CH₃CH(OH)CH₃).

Quiz 27: Reactions of Organic Compounds

Give the product(s) of the reaction: CH₂=CHCH₃ + HCl → product(s)

Oxidation of the following alcohol via the conditions below yields spearmint oil.What new functional group is formed in the reaction to yield spearmint?

Predict the major product for the reaction: 1-butene + HI →

Suggest reagents for the synthesis of meta-chloronitrobenzene from nitrobenzene.

Predict the major product for the reaction: 2-methyl-2-pentene + HCl →

What is the major product in the following transformation?

Lindlar's catalyst is used when ________.

What alkene(s) would be produced in the following reaction?

Predict the major product for the reaction: 2-methyl-2-butene + HBr →

Identify the product for the following reaction:

The common general anesthetic neothyl can be produced by the following dehydration reaction.What is the systematic name of neothyl? CH₃CH₂CH₂OH + CH₃OH ?

Predict the major product for the reaction: CH₃C≡CH + 2 HBr →

What is the main product of the following reaction?

Write down the rate law for E1 reactions (S is a substrate and B is a base) .

Which are the most probable reactions and mechanisms in which tertiary haloalkanes participate? I.Substitution,S_N1 II.Substitution S_N2 III.Elimination E1 IV.Elimination E2 V.Addition

Order the following substrates according to the increase in S_N2 reaction rate: (CH₃) ₂CHBr, (CH₃) ₃CBr,CH₃CH₂Br,CH₃Br

Give the correct mathematical expression for the rate law for E2 reactions (S is a substrate and B is a base) .

When (CH₃) ₃CBr reacts with CH₃ONa in methanol,two products are formed: a major one is an alkene and minor one is an ether.Identify the two products and by what mechanism(s) they are formed?

Which of the following alcohols can eliminate water to produce alkene? I.phenol II.HOC(CH₃) ₃ III.HOCH(CH₃) ₂

Give the product(s) of the reaction (in H₂SO₄) : CH₂=CHCH₃ + H₂O → product(s)

Quiz 27: Reactions of Organic Compounds

Give the product(s) of the reaction: CH2=CHCH3 + HCl → product(s)

Oxidation of the following alcohol via the conditions below yields spearmint oil.What new functional group is formed in the reaction to yield spearmint?

Predict the major product for the reaction: 1-butene + HI →

Suggest reagents for the synthesis of meta-chloronitrobenzene from nitrobenzene.

Predict the major product for the reaction: 2-methyl-2-pentene + HCl →

What is the major product in the following transformation?

Lindlar's catalyst is used when ________.

What alkene(s) would be produced in the following reaction?

Predict the major product for the reaction: 2-methyl-2-butene + HBr →

Identify the product for the following reaction:

The common general anesthetic neothyl can be produced by the following dehydration reaction.What is the systematic name of neothyl? CH3CH2CH2OH + CH3OH ?

Predict the major product for the reaction: CH3C≡CH + 2 HBr →

What is the main product of the following reaction?

Write down the rate law for E1 reactions (S is a substrate and B is a base) .

Which are the most probable reactions and mechanisms in which tertiary haloalkanes participate? I.Substitution,SN1 II.Substitution SN2 III.Elimination E1 IV.Elimination E2 V.Addition

Order the following substrates according to the increase in SN2 reaction rate: (CH3) 2CHBr, (CH3) 3CBr,CH3CH2Br,CH3Br

Give the correct mathematical expression for the rate law for E2 reactions (S is a substrate and B is a base) .

When (CH3) 3CBr reacts with CH3ONa in methanol,two products are formed: a major one is an alkene and minor one is an ether.Identify the two products and by what mechanism(s) they are formed?

Which of the following alcohols can eliminate water to produce alkene? I.phenol II.HOC(CH3) 3 III.HOCH(CH3) 2

Give the product(s) of the reaction (in H2SO4) : CH2=CHCH3 + H2O → product(s)

Give the product(s) of the reaction: CH₂=CHCH₃ + HCl → product(s)

The common general anesthetic neothyl can be produced by the following dehydration reaction.What is the systematic name of neothyl? CH₃CH₂CH₂OH + CH₃OH ?

Predict the major product for the reaction: CH₃C≡CH + 2 HBr →

Which are the most probable reactions and mechanisms in which tertiary haloalkanes participate? I.Substitution,S_N1 II.Substitution S_N2 III.Elimination E1 IV.Elimination E2 V.Addition

Order the following substrates according to the increase in S_N2 reaction rate: (CH₃) ₂CHBr, (CH₃) ₃CBr,CH₃CH₂Br,CH₃Br

When (CH₃) ₃CBr reacts with CH₃ONa in methanol,two products are formed: a major one is an alkene and minor one is an ether.Identify the two products and by what mechanism(s) they are formed?

Which of the following alcohols can eliminate water to produce alkene? I.phenol II.HOC(CH₃) ₃ III.HOCH(CH₃) ₂

Give the product(s) of the reaction (in H₂SO₄) : CH₂=CHCH₃ + H₂O → product(s)