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Question 10 3 points Which of the following is FALSE regarding Sn2 reactions? They always occur...
7. Which of the following statements is TRUE? A) SN2 reactions occur with the same rate regardless of the structure...
7. Which of the following statements is TRUE? A) SN2 reactions occur with the same rate regardless of the structure of alkyl halide or substrate B) S2 reactions are concerted with no intermediate C) S 2 reactions proceed with the same rate regardless of the nucleophile used D) S2 reactions are best performed in polar protic solvents E) In an S 2 reaction, loss of the leaving group to give a carbocation is the rate-limiting step 8. Consider the following...
True/False Indicate whether the statement is (A) true or (B) false. In the most stable conformation...
True/False Indicate whether the statement is (A) true or (B) false. In the most stable conformation of a cyclohexane, it is preferable to have as many substituents in the axial position as possible. 2. 3. Syl reactions may involve a carbocation rearrangement. Tertiary alkyl halides are more likely to participate in an Sy2 reaction. 4. Cis-1,3-dimethyleyclohexane and trans-1,3-cyclohexane are enantiomers. 5. 6. An Sy2 reaction results in inversion of the relative configuration. The rate of an SNl reaction can be...
16. Which of the following is correct regarding Sy2 reactions of alkyl halides? A. Secondary halides...
16. Which of the following is correct regarding Sy2 reactions of alkyl halides? A. Secondary halides react faster than primary halides. B. Rate of reaction depends on the concentrations of the alkyl halide only. C. Favored in polar aprotic solvents D. Results in a racemic mixture
Which of the following statements about the stereochemical outcomes of substitution reactions are TRUE? (check all...
Which of the following statements about the stereochemical outcomes of substitution reactions are TRUE? (check all that are true) The carbocation intermediate in SN1 reactions can be attacked from either side giving a mixture of stereoisomers. SN2 reactions give complete retention of configuration. SN2 reactions give only inversion of stereochemistry SN1 reactions give racemic products or mixtures of diastereomers.
1.(1 pt. each) Consider the following statements regarding Syl, SN2, E1 and E2 reactions. To which...
1.(1 pt. each) Consider the following statements regarding Syl, SN2, E1 and E2 reactions. To which mechansims, if any, does each statement apply? If the statement can be applied to more than one mechanism, indicate each mechanism. SNI a) Involves a carbocation intermediate SNIEL b) Substitution at a stereocenter give predominantly a racemic product c) Rearrangements of the carbon skeleton are possible. EL SM d) Is greatly accelerated in protic solvents of increasing polarity SN e) Is first order in...
Organic Chemistry: Vocabulary: i.) If we have a weakly basic nucleophile and a secondary haloalkane we’ll...
Organic Chemistry: Vocabulary: i.) If we have a weakly basic nucleophile and a secondary haloalkane we’ll generally get _ mechanism(s). a. SN1 only b. SN2 c. E2 d. E1 only e. SN1 and E1 f. no reaction This mechanism will have ____ stereochemistry, a. predictable b. random due to the ____. a. planar intermediate b. backside attack transition state c. frontside attack transition state d. anti-periplanar transition state _____________________________________________________ ii.) Carbocation rearrangements will tend to form the __ stable intermediate....
3) Name two solvents that are commonly used for SN2 reactions. because they considerably slow down...
3) Name two solvents that are commonly used for SN2 reactions.
because they considerably slow down SN1 reactions.
Introduction Alkyl halides can be prepared from alcohols by reactions with hydrogen halides (HCI, HBr, or HI) via nucleophilic substitution. In this type of reaction, the nucleophile displaces a leaving group from a carbon atom of an organic substrate (here the alcohol once protonated). Both electrons of the new bond to the carbon are provided by the nucleophile while the leaving group...
how would I solve 21 and 22 Question 21 (4 points) Which of the following is...
how would I solve 21 and 22
Question 21 (4 points) Which of the following is an SN2 reaction? OCH, OH + CH3 OH – CH3 – 0 – CH3 + H2O O CH3 I + KOH – CH3 OH + KI OCH3 CH2 I + KOH – CH2 = CH2 + H2O + OCH2 = CH2 + HCI – CH3 CH, CI Which statement is true for SN2 reactions? substitution at the stereocenter gives predominantly a racemic product O...
3. Which of the reactions proceeded predominantly by the Si substitution mechanism? Passage 10 (Questions 1-6)...
3. Which of the reactions proceeded predominantly by the Si substitution mechanism? Passage 10 (Questions 1-6) A student ran a series of experiments to study the S1 and S2 reaction mechanisms. The results are shown below: A. Reactions 1 and B. Reactions 2 and 4 C. Reactions 3 and 4 D. Reactions 3 and 5 Nal 1. Br acetone Br OE NaOE: HOE: 4. Which one of the following statements concerning the $ 2 reaction mechanism is true? A. It...
please help!!! are my answers right??? True Larger atoms are better nucleophiles due to polarizability. False...
please help!!! are my answers right???
True Larger atoms are better nucleophiles due to polarizability. False The identity of the nucleophile affects the rate of an SN1 reaction. False SN2 reactions proceed via frontside attack. True Bimolecular reactions tend to be stereoselective. True SN2 reactions invert all stereocenters in a haloalkane. False Cl-, OH-, and H-are good all leaving groups. True Good bases tend to be good nucleophiles arch True Branching adjacent to a reacting carbon slows SN2 reactions due...
7. Which of the following statements is TRUE? A) SN2 reactions occur with the same rate regardless of the structure of alkyl halide or substrate B) S2 reactions are concerted with no intermediate C) S 2 reactions proceed with the same rate regardless of the nucleophile used D) S2 reactions are best performed in polar protic solvents E) In an S 2 reaction, loss of the leaving group to give a carbocation is the rate-limiting step 8. Consider the following...
True/False Indicate whether the statement is (A) true or (B) false. In the most stable conformation of a cyclohexane, it is preferable to have as many substituents in the axial position as possible. 2. 3. Syl reactions may involve a carbocation rearrangement. Tertiary alkyl halides are more likely to participate in an Sy2 reaction. 4. Cis-1,3-dimethyleyclohexane and trans-1,3-cyclohexane are enantiomers. 5. 6. An Sy2 reaction results in inversion of the relative configuration. The rate of an SNl reaction can be...
16. Which of the following is correct regarding Sy2 reactions of alkyl halides? A. Secondary halides react faster than primary halides. B. Rate of reaction depends on the concentrations of the alkyl halide only. C. Favored in polar aprotic solvents D. Results in a racemic mixture
1.(1 pt. each) Consider the following statements regarding Syl, SN2, E1 and E2 reactions. To which mechansims, if any, does each statement apply? If the statement can be applied to more than one mechanism, indicate each mechanism. SNI a) Involves a carbocation intermediate SNIEL b) Substitution at a stereocenter give predominantly a racemic product c) Rearrangements of the carbon skeleton are possible. EL SM d) Is greatly accelerated in protic solvents of increasing polarity SN e) Is first order in...
3) Name two solvents that are commonly used for SN2 reactions.
because they considerably slow down SN1 reactions.
Introduction Alkyl halides can be prepared from alcohols by reactions with hydrogen halides (HCI, HBr, or HI) via nucleophilic substitution. In this type of reaction, the nucleophile displaces a leaving group from a carbon atom of an organic substrate (here the alcohol once protonated). Both electrons of the new bond to the carbon are provided by the nucleophile while the leaving group...
how would I solve 21 and 22
Question 21 (4 points) Which of the following is an SN2 reaction? OCH, OH + CH3 OH – CH3 – 0 – CH3 + H2O O CH3 I + KOH – CH3 OH + KI OCH3 CH2 I + KOH – CH2 = CH2 + H2O + OCH2 = CH2 + HCI – CH3 CH, CI Which statement is true for SN2 reactions? substitution at the stereocenter gives predominantly a racemic product O...
3. Which of the reactions proceeded predominantly by the Si substitution mechanism? Passage 10 (Questions 1-6) A student ran a series of experiments to study the S1 and S2 reaction mechanisms. The results are shown below: A. Reactions 1 and B. Reactions 2 and 4 C. Reactions 3 and 4 D. Reactions 3 and 5 Nal 1. Br acetone Br OE NaOE: HOE: 4. Which one of the following statements concerning the $ 2 reaction mechanism is true? A. It...
please help!!! are my answers right???
True Larger atoms are better nucleophiles due to polarizability. False The identity of the nucleophile affects the rate of an SN1 reaction. False SN2 reactions proceed via frontside attack. True Bimolecular reactions tend to be stereoselective. True SN2 reactions invert all stereocenters in a haloalkane. False Cl-, OH-, and H-are good all leaving groups. True Good bases tend to be good nucleophiles arch True Branching adjacent to a reacting carbon slows SN2 reactions due...
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