Homework Answers
1.b -NH2 is an ortho, para director. since -NH2 has a lone pair and behaves as a electron-donating group. Thus, it directs towards the electron deficient centres of the benzene which is ortho and para position.
2.d -COCH3 is a meta director. meta directing groups are electron-withdrawing groups.
3.b -COOH is meta-deactivating group. this is an electron-withdrawing group.
4.b -F is ortho, para director and a deactivator. though fluoride ion is electron donating group but since, it is very electronegative this cause inductive withdrawal.
5.e when toluene reacts with Br2 in the presence of FeBr3 a mixture of o-bromotoluene and p-bromotoluene is obtained. since ortho side is hindered by the alkyl group, therefore, the ortho product is minor and para product is major.
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Which of the following is an ortho-and Para-director? Which of the following is a meta-director? Which...
Objectives - Section 1 • Identify a substituent as an ortho para director or a meta director, Draw the resonance st...
Objectives - Section 1 • Identify a substituent as an ortho para director or a meta director, Draw the resonance structure that explains the relative directing ability of a specific substituent. Classify a substituent as an activating or a deactivating group. Explain why the halogens are ortho/para directors but are deactivators. • 1. Draw the mechanism of the reaction below and use resonance structures of the arenium ion intermediate to explain why the starting material is an ortho/para director
i know that C is a meta director, but are any of these ortho or para,...
i know that C is a meta director, but are any of these ortho
or para, or any other kind of directors? thanks!
4. Which of the following is a meta director?
Nitro group (-NO.) as a strong deactivator, is a me tivator is a meta-director in electrophilie...
Nitro group (-NO.) as a strong deactivator, is a me tivator is a meta-director in electrophilie substitution reactions. Why? A) Because it decreases electron density mostly on ortho and para positions, thus making meta positions better reactive sites, B) Because it deactivates ortho and para positions and activates the meta positions. c) Because all deactivators are meta-directors. D) Because its resonance effect competes against its inductive effect and the resonance effect increases the electron density on meta positions. E) All...
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) Which of the following is an intermediate in the bromination of toluene? p) Ha BrH...
1) Which of the following is an intermediate in the bromination of toluene? p) Ha BrH 2 2) Under what reaction conditions would the electrophilic chlorination of aromatic compounds usually occur? A) Cl2, AlCl3 B) C12, CCl4 C) Cl2, H20 D) NaCl, H20 E) NaCI, CH3OH 3) 3) Which of the following is the strongest activating group in electrophilic aromatic substitution reactions? A) -CO2CH3 B)-NO2 C) -OCH3 D) -CH2CH3 E) -N(CH3)2 4) _ 4) In electrophilic aromatic substitution reactions the...
3. Classify the following substituents as orthol para activating, ortho/para deactivating meta deactivating. CN F Show...
3. Classify the following substituents as orthol para activating, ortho/para deactivating meta deactivating. CN F
Name the following compound using the ortho (o), meta (m) or para (p) designation. 5. Name...
Name the following compound using the ortho (o), meta
(m) or para (p) designation.
5. Name the following compound using the ortho (o), meta (m) or para (p) designation OOH Enter the name of the compound here
Name the following compound using ortho (o), meta (m) or para (p) designation. 5. Name the...
Name the following compound using ortho (o), meta (m) or para (p)
designation.
5. Name the following compound using the ortho (o), meta (m) or para (p) designation. OOH CI Enter the name of the compound here
Sort the following molecules by whether the substituent group is ortho/para or meta directing for electrophilic...
Sort the following molecules by whether the substituent group is
ortho/para or meta directing for electrophilic aromatic
substitution.
Sort the following molecules by whether the substituent group is ortho/para or meta directing for electrophilic aromatic substitution.
15. Indicate those ortho/para director(s) and those meta director(s) - NO2 Br - -C₂Hs - NH2...
15. Indicate those ortho/para director(s) and those meta director(s) - NO2 Br - -C₂Hs - NH2 CoHs nat reagent(s), solvent(s) and chemicals are needed in making a Grignard reagent (C2HsMgBri? Choose from the following list. Water diethyl ether lithium, phenyl bromide, ethyl bromide (MR) iodine, sodium bromide, heat 17. Which one of the following reaction is a nucleophilic aromatic substitution reaction? Which one is an electrophilic aromatic substitution? HNOH,SO 18. Predict the product:
Objectives - Section 1 • Identify a substituent as an ortho para director or a meta director, Draw the resonance structure that explains the relative directing ability of a specific substituent. Classify a substituent as an activating or a deactivating group. Explain why the halogens are ortho/para directors but are deactivators. • 1. Draw the mechanism of the reaction below and use resonance structures of the arenium ion intermediate to explain why the starting material is an ortho/para director
i know that C is a meta director, but are any of these ortho
or para, or any other kind of directors? thanks!
4. Which of the following is a meta director?
Nitro group (-NO.) as a strong deactivator, is a me tivator is a meta-director in electrophilie substitution reactions. Why? A) Because it decreases electron density mostly on ortho and para positions, thus making meta positions better reactive sites, B) Because it deactivates ortho and para positions and activates the meta positions. c) Because all deactivators are meta-directors. D) Because its resonance effect competes against its inductive effect and the resonance effect increases the electron density on meta positions. E) All...
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) Which of the following is an intermediate in the bromination of toluene? p) Ha BrH 2 2) Under what reaction conditions would the electrophilic chlorination of aromatic compounds usually occur? A) Cl2, AlCl3 B) C12, CCl4 C) Cl2, H20 D) NaCl, H20 E) NaCI, CH3OH 3) 3) Which of the following is the strongest activating group in electrophilic aromatic substitution reactions? A) -CO2CH3 B)-NO2 C) -OCH3 D) -CH2CH3 E) -N(CH3)2 4) _ 4) In electrophilic aromatic substitution reactions the...
3. Classify the following substituents as orthol para activating, ortho/para deactivating meta deactivating. CN F
Name the following compound using the ortho (o), meta
(m) or para (p) designation.
5. Name the following compound using the ortho (o), meta (m) or para (p) designation OOH Enter the name of the compound here
Name the following compound using ortho (o), meta (m) or para (p)
designation.
5. Name the following compound using the ortho (o), meta (m) or para (p) designation. OOH CI Enter the name of the compound here
Sort the following molecules by whether the substituent group is
ortho/para or meta directing for electrophilic aromatic
substitution.
Sort the following molecules by whether the substituent group is ortho/para or meta directing for electrophilic aromatic substitution.
15. Indicate those ortho/para director(s) and those meta director(s) - NO2 Br - -C₂Hs - NH2 CoHs nat reagent(s), solvent(s) and chemicals are needed in making a Grignard reagent (C2HsMgBri? Choose from the following list. Water diethyl ether lithium, phenyl bromide, ethyl bromide (MR) iodine, sodium bromide, heat 17. Which one of the following reaction is a nucleophilic aromatic substitution reaction? Which one is an electrophilic aromatic substitution? HNOH,SO 18. Predict the product:
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