1. In the SN1 mechanism, the second step is attack of the nucleophile, so increasing the...
1. In the SN1 mechanism, the second step is attack of the nucleophile, so increasing the nucleophile concentration should speed up this step. Why, then, do we say that the rate of an SN1 reaction does not depend on the concentration of the nucleophile?
2. If one wants to select a substrate that will react in both SN1 and SN2 reactions, what substrate structure characteristics are desirable?
3. Iodide is a good nucleophile and also a good leaving group. Yet if we included methyl iodide (CH3I) in our NaI/acetone experiments, we would have observed no reaction. Why is this?
Homework Answers
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1. In the SN1 mechanism, the second step is attack of
the nucleophile, so increasing the...
5. Why is Iodide such a good nucleophile? 9. Iodide is a good nucleophile and also...
5. Why is Iodide such a good nucleophile? 9. Iodide is a good nucleophile and also a good leaving group. Yet if we include methyl iodide (CH3I) in our NaI/acetone experiments, we would have observed no reaction. why is this?
1. In both the sodium iodide test and the silver nitrate test, why does 2-bromobutane react faster...
1. In both the sodium iodide
test and the silver nitrate test, why does 2-bromobutane react
faster than 2-chlorobutane?
Bromine is a better leaving group since it is a weaker base than
chlorine is.
2. a. Why does benzyl chloride react under both
SN1 and SN2 conditions?
Benzyl
chloride is a primary alkyl halide, hence reactive under SN2
conditions.
The
primary carbocation formed due to the departure of Cl- is
stabilized by the pi electrons in the benzene ring.
b. Why is...
1. You wish to substitute the bromine in the following molecules with a nucleophile. Explain whether...
1. You wish to substitute the bromine in the following molecules with a nucleophile. Explain whether the given molecule would react by the Sn1 and Sn2 mechanism and explain why. 1-methyl-1-bromo-cyclohexane, 1-bromopropane, 2-bromohexane. 1.Why does benzyl bromide react under both Sn1 conditions and Sn2 conditions? 2.Why is bromobenzene nonreactive under both Sn1 and Sn2 conditions? 5. If bromocyclohexane reacts faster than chlorocyclohexane in an Sn2 reaction, what could be the reason? 11. Account for the rapid rate of ethanolysis of...
1. (a) In the first step of an SN1 reaction, the carbon-leaving group bond breaks and...
1. (a) In the first step of an SN1 reaction, the carbon-leaving group bond breaks and a carbocation forms. In the second step, the carbocation undergoes a nucleophilic attack. The rate limiting step in an SN1 reaction is: The nucleophilic attack. The formation of the product. The formation of the carbocation. Submit Answer Tries 0/1 (b) In an SN2 reaction, the nucleophile attacks while the leaving group leaves in a concerted mechanism. The rate limiting step in an SN2 reaction...
We begin with the surmise that the nucleophilic substitution reactions can occur only by one of...
We begin with the surmise that the nucleophilic substitution reactions can occur only by one of two mechanisms: Sn1 solvolysis: three-step mechanism R-X slow, R® + to R® + ROH fast , ROM R' H. R-O + R'OH fast , ROR' + R- SN2: one-step mechanism R-X + Nuc slow, Nuc-R + x Begin by answering the three questions below. If you don't understand what's up, please ask! 1. Write out the rate law for the above Sn1 reaction and...
Determine if each of the following statements is true or false 1 Larger atoms are better...
Determine if each of the following statements is true or false 1 Larger atoms are better nucleophiles due to polarizability. 2 The identity of the nucleophile affects the rate of an SN1 reaction. 3 SN2 reactions proceed via frontside attack. 4 Bimolecular reactions tend to be stereoselective. 5 SN2 reactions invert all stereocenters in a haloalkane. 6 Cl-, OH-, and...
1) State which of the electrophiles given below will react preferentially by i) SN1, ii) by...
1) State which of the electrophiles given below will react
preferentially by i) SN1, ii) by SN2, or iii) capable of reacting
by either of the two mechanisms depending on the given conditions.
How can you affect those conditions to favour SN1 or SN2? Reason
your predictions based on the structures of the compounds. Br-CH3,
Br-CH2CH3, Br-CH(CH3)2, Br-C(CH3)3, Br-CH2-C5H6; C5H6 = phenyl
Introduction Alkyl halides can be prepared from alcohols by reactions with hydrogen halides (HCI, HBr, or HI) via...
1) Compare and contrast SN1, SN2, E1, and E2 reactions! (similarities abd differences. Requirements for each...
1) Compare and contrast SN1, SN2, E1, and E2 reactions!
(similarities abd differences. Requirements for each to
work.)
2) Why is SN2 is in direct competition with E2 while SN1 is
direct competition with E1 reaction.
3) Rate expression of each
4) which reactions are concerted? Which are atep wise?
5) which are sterospecific and what stereospecificity of each
are?
6) how do the variables below (A-D) influence reaction
pathway?
Compare and contrast SNI, SN2, El and E2 reactions. What...
2) Predict the order of reactivity (1=least, 4=most) of primary, secondary, tertiary, and aryl halides toward...
2) Predict the order of reactivity (1=least, 4=most) of
primary, secondary, tertiary, and aryl halides toward nucleophilic
displacement by an SN1 reaction mechanism. Explain
3) Give a detailed summary of the chemistry in both reactions
SN2 and SN1 in details please for both reactions. include any
general statements about the experiments.
LAB)o Organic Chemistry I Lab CHEM 3512 Nueleophilic Substitution Reactions: Sl vs S2 To review Sul, S2, El and E2 reactions and mechanisms and compare and contrast the effect...
use the notes provided to help answer the question above. will rate well The second step...
use the notes provided to help answer the question
above. will rate well
The second step of the synthesis transformation of the chlorosulfonyl functional group into a sulfonamide) is an example of a a. Nucleophilic displacement (substitution) b Elimination C. Electrophilic aromatic substitution d. Acid hydrolysis Esterification e. THE SULFONIC ACID GROUP AND ITS DERIVATIVES Sulfonic acids are organic analogs of sulfuric acid, a very strong acid. They are highly corrosive, react vigorously with water, and can cause skin bums....
1. In both the sodium iodide
test and the silver nitrate test, why does 2-bromobutane react
faster than 2-chlorobutane?
Bromine is a better leaving group since it is a weaker base than
chlorine is.
2. a. Why does benzyl chloride react under both
SN1 and SN2 conditions?
Benzyl
chloride is a primary alkyl halide, hence reactive under SN2
conditions.
The
primary carbocation formed due to the departure of Cl- is
stabilized by the pi electrons in the benzene ring.
b. Why is...
1. (a) In the first step of an SN1 reaction, the carbon-leaving group bond breaks and a carbocation forms. In the second step, the carbocation undergoes a nucleophilic attack. The rate limiting step in an SN1 reaction is: The nucleophilic attack. The formation of the product. The formation of the carbocation. Submit Answer Tries 0/1 (b) In an SN2 reaction, the nucleophile attacks while the leaving group leaves in a concerted mechanism. The rate limiting step in an SN2 reaction...
We begin with the surmise that the nucleophilic substitution reactions can occur only by one of two mechanisms: Sn1 solvolysis: three-step mechanism R-X slow, R® + to R® + ROH fast , ROM R' H. R-O + R'OH fast , ROR' + R- SN2: one-step mechanism R-X + Nuc slow, Nuc-R + x Begin by answering the three questions below. If you don't understand what's up, please ask! 1. Write out the rate law for the above Sn1 reaction and...
1) State which of the electrophiles given below will react
preferentially by i) SN1, ii) by SN2, or iii) capable of reacting
by either of the two mechanisms depending on the given conditions.
How can you affect those conditions to favour SN1 or SN2? Reason
your predictions based on the structures of the compounds. Br-CH3,
Br-CH2CH3, Br-CH(CH3)2, Br-C(CH3)3, Br-CH2-C5H6; C5H6 = phenyl
Introduction Alkyl halides can be prepared from alcohols by reactions with hydrogen halides (HCI, HBr, or HI) via...
1) Compare and contrast SN1, SN2, E1, and E2 reactions!
(similarities abd differences. Requirements for each to
work.)
2) Why is SN2 is in direct competition with E2 while SN1 is
direct competition with E1 reaction.
3) Rate expression of each
4) which reactions are concerted? Which are atep wise?
5) which are sterospecific and what stereospecificity of each
are?
6) how do the variables below (A-D) influence reaction
pathway?
Compare and contrast SNI, SN2, El and E2 reactions. What...
2) Predict the order of reactivity (1=least, 4=most) of
primary, secondary, tertiary, and aryl halides toward nucleophilic
displacement by an SN1 reaction mechanism. Explain
3) Give a detailed summary of the chemistry in both reactions
SN2 and SN1 in details please for both reactions. include any
general statements about the experiments.
LAB)o Organic Chemistry I Lab CHEM 3512 Nueleophilic Substitution Reactions: Sl vs S2 To review Sul, S2, El and E2 reactions and mechanisms and compare and contrast the effect...
use the notes provided to help answer the question
above. will rate well
The second step of the synthesis transformation of the chlorosulfonyl functional group into a sulfonamide) is an example of a a. Nucleophilic displacement (substitution) b Elimination C. Electrophilic aromatic substitution d. Acid hydrolysis Esterification e. THE SULFONIC ACID GROUP AND ITS DERIVATIVES Sulfonic acids are organic analogs of sulfuric acid, a very strong acid. They are highly corrosive, react vigorously with water, and can cause skin bums....
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