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10. (12 points) Cua CHaCHa Les eb Predict whether the following substituents on the benzene ring...
437 Predict whether the following substituents on the benzene ring are likely to be ha para...
437 Predict whether the following substituents on the benzene ring are likely to be ha para directing or meta directing and whether they are like to be ring activating or ring deactivating deact vabang a) - NH(CH 4.38 For each of the monosabstituted benenes shown below, (1) Indicate whether the substituent is ortho, para directing or meta directing (2) Draw the structure of the main monosubstitution product for each of the reactions indicated orth. OCH3 + HCl -OCHE (fecutulys ortho...
to form Which of the following possible Birch reduction products would not be expected CH3 CH3...
to form Which of the following possible Birch reduction products would not be expected CH3 CH3 0 CH3 A. B. C. Which of the following substrates would most likely undergo a successful nucleophilic aromatic substitution reaction with diethylamine? NO2 NO 2 NO 2 A. B. C. D. Which of the following resonance structures does not depict stabilization of the negative charge in the Meisenheimer complex? 0 A. The nitro group has which of the following effects in electrophilic aromatic substitution?...
Predict the effect the substituent attached to the benzene ring below would have on electrophilic aromatic...
Predict the effect the substituent attached to the benzene ring below would have on electrophilic aromatic substitution reactions? CH, CH3 a) meta director, deactivator b) ortho/para director, activator c) meta director, activator d) ortho/para director, deactivator
The N,N,N-trimethylammonium group, -N(CH3)3*, is one of the few substituents on a benzene ring that is...
The N,N,N-trimethylammonium group, -N(CH3)3*, is one of the few substituents on a benzene ring that is a deactivating, meta-directing group, yet has no electron-withdrawing resonance effect. Explain.
3. Draw the structural formulas for the following compounds. (10 points, 2 each) a. 2-propanol b....
3. Draw the structural formulas for the following compounds. (10 points, 2 each) a. 2-propanol b. 2-methyl-5-hexene-2-ol c. 3-cyclohexenol d. 4-nitrophenol e. phenol 4. Classify the following substituents as ortho/para or meta directing and activating or deactivating (two part answer for each group) (note the line 34 indicates where the group is attached to the benzene ring. (12points, 2 each) NH2 Ooh &r HC-CH₃ No? QH
Label the following as activating (A) or deactivating (D), and then also as ortho/para directors (OP)...
Label the following as activating (A) or deactivating (D), and then also as ortho/para directors (OP) or meta directors (M). Write the answer below each group. N "Here with other ty A/D? = = = = OP/M? = f) Using resonance structures, explain why a nitro group is "meta-directing" (i.e. does the nitro group actually affect the meta positions?) g) As mentioned in class, the halogens are a bit anomalous as substituents on the aromatic ring: they are deactivating groups,...
1. Complete the following exercises: A. Indicate whether each substituted benzene ring will produce predominantly ortho/para...
1. Complete the following exercises: A. Indicate whether each substituted benzene ring will produce predominantly ortho/para or meta products) after electrophilic aromatic substitution: B. Identify the molecule that can undergo nucleophilic aromatic substitution by addition/elimination:
on T. Maitiple choiee. Select the best anaver. (0.5 points each) i. Which statement below is...
on T. Maitiple choiee. Select the best anaver. (0.5 points each) i. Which statement below is true the aromatic substitution involving the bromina of benzene? znBry acts as the Lewis acid B) Feßr, acts as the Lewis base c) Br, acts as nugaed aromatic ring D) n-electrons of benzene act as the electrophile E) FeBr, acta as the Lewis acid. a what is rue about the rate and the najor predust of nitration of the methoxybenzene? A) Proceeds more rapidly...
The following substituents affect the reactivity of an aromatic compound. Indicate the effect(s) that each group...
The following substituents affect the reactivity of an aromatic
compound. Indicate the effect(s) that each group has upon the
electron density of the aryl ring. (a) Label ‘NI’ for no induction
effect, ‘+I’ for induction pushing electron density into the ring,
or ‘-I’ for induction pulling electron density out of the ring. (b)
Label ‘NR’ for no resonance effect, ‘+R’ for resonance pushing
electron density into the ring, or ‘-R’ for resonance pulling
electron density out of the ring. (c)...
12. Dialkyl ethers (e.g., diethyl ether) are typically unreactive with all of the following classes of...
12. Dialkyl ethers (e.g., diethyl ether) are typically unreactive with all of the following classes of reagents except: d. reducing agents c. nucleophiles b. strong bases a. strong acids 13. The carbonyl carbon of (C 0) of aldehydes and ketones has a high degree of (positive or negative) charge which provides a good site for attack of (electrophiles or nucleophiles). a. negative, electrophiles b. negative, nucleophiles a. positive, electroph b. positive, nucleophiles 14. Which of the following is the major...
437 Predict whether the following substituents on the benzene ring are likely to be ha para directing or meta directing and whether they are like to be ring activating or ring deactivating deact vabang a) - NH(CH 4.38 For each of the monosabstituted benenes shown below, (1) Indicate whether the substituent is ortho, para directing or meta directing (2) Draw the structure of the main monosubstitution product for each of the reactions indicated orth. OCH3 + HCl -OCHE (fecutulys ortho...
to form Which of the following possible Birch reduction products would not be expected CH3 CH3 0 CH3 A. B. C. Which of the following substrates would most likely undergo a successful nucleophilic aromatic substitution reaction with diethylamine? NO2 NO 2 NO 2 A. B. C. D. Which of the following resonance structures does not depict stabilization of the negative charge in the Meisenheimer complex? 0 A. The nitro group has which of the following effects in electrophilic aromatic substitution?...
Predict the effect the substituent attached to the benzene ring below would have on electrophilic aromatic substitution reactions? CH, CH3 a) meta director, deactivator b) ortho/para director, activator c) meta director, activator d) ortho/para director, deactivator
The N,N,N-trimethylammonium group, -N(CH3)3*, is one of the few substituents on a benzene ring that is a deactivating, meta-directing group, yet has no electron-withdrawing resonance effect. Explain.
3. Draw the structural formulas for the following compounds. (10 points, 2 each) a. 2-propanol b. 2-methyl-5-hexene-2-ol c. 3-cyclohexenol d. 4-nitrophenol e. phenol 4. Classify the following substituents as ortho/para or meta directing and activating or deactivating (two part answer for each group) (note the line 34 indicates where the group is attached to the benzene ring. (12points, 2 each) NH2 Ooh &r HC-CH₃ No? QH
Label the following as activating (A) or deactivating (D), and then also as ortho/para directors (OP) or meta directors (M). Write the answer below each group. N "Here with other ty A/D? = = = = OP/M? = f) Using resonance structures, explain why a nitro group is "meta-directing" (i.e. does the nitro group actually affect the meta positions?) g) As mentioned in class, the halogens are a bit anomalous as substituents on the aromatic ring: they are deactivating groups,...
1. Complete the following exercises: A. Indicate whether each substituted benzene ring will produce predominantly ortho/para or meta products) after electrophilic aromatic substitution: B. Identify the molecule that can undergo nucleophilic aromatic substitution by addition/elimination:
on T. Maitiple choiee. Select the best anaver. (0.5 points each) i. Which statement below is true the aromatic substitution involving the bromina of benzene? znBry acts as the Lewis acid B) Feßr, acts as the Lewis base c) Br, acts as nugaed aromatic ring D) n-electrons of benzene act as the electrophile E) FeBr, acta as the Lewis acid. a what is rue about the rate and the najor predust of nitration of the methoxybenzene? A) Proceeds more rapidly...
The following substituents affect the reactivity of an aromatic
compound. Indicate the effect(s) that each group has upon the
electron density of the aryl ring. (a) Label ‘NI’ for no induction
effect, ‘+I’ for induction pushing electron density into the ring,
or ‘-I’ for induction pulling electron density out of the ring. (b)
Label ‘NR’ for no resonance effect, ‘+R’ for resonance pushing
electron density into the ring, or ‘-R’ for resonance pulling
electron density out of the ring. (c)...
12. Dialkyl ethers (e.g., diethyl ether) are typically unreactive with all of the following classes of reagents except: d. reducing agents c. nucleophiles b. strong bases a. strong acids 13. The carbonyl carbon of (C 0) of aldehydes and ketones has a high degree of (positive or negative) charge which provides a good site for attack of (electrophiles or nucleophiles). a. negative, electrophiles b. negative, nucleophiles a. positive, electroph b. positive, nucleophiles 14. Which of the following is the major...
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