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29. In the following reaction, the alkyl halide makes a carbocation intermediate before the electrophilic attack...
- + fit to page Page view A Read aloud Synthesize the following compounds from benzene...
- + fit to page Page view A Read aloud Synthesize the following compounds from benzene : (10 pts) - + Fit to page Page view A+ 29. In the following reaction, the alkyl halide makes a carbocation intermediate before the electrophilic attack by the aromatic ring Explain why the product is not observed in this reaction. What product is produced? (10 pts) CH
250 ChemActivity 29 Electrophilic Aromatic Substitution no ChemActivity 29 Part A: Electrophilic Aromatic Substitution (What products...
250 ChemActivity 29 Electrophilic Aromatic Substitution no ChemActivity 29 Part A: Electrophilic Aromatic Substitution (What products are formed when a strong electrophile is added to benzene?) Model 1: (review) Electrophilic Addition of HCI Rani o g cyclohexene carbocation intermediate Run 2 U X benzene This product carbocation intermediate DOES NOT Critical Thinking Questions 1 For Rxn I (above) draw curved arrows showing the mechanism of electrophilic addition of HCl. Include an appropriate carbocation intermediate in the box above. Figure 1:...
Draw the major organic product of the following Friedel–Crafts alkylation. (An excess of benzene is present.)...
Draw the major organic product of the following Friedel–Crafts
alkylation. (An excess of benzene is present.)
aw the major organic product of the following Friedel-Crafts alkylation. (An excess of benzene is present.) AICI, Previous ⓧ Give Up & View Solution # Try Again Next Exit Explanation This reaction is an electrophilic aromatic substitution. The aluminum chloride polarizes the chlorine-carbon bond of the alkyl halide, imparting carbocation character (i.e., electrophilicity) to the alkyl group Since an excess of benzene is present,...
why is electrophilic addition reaction must happen on double bond ? Look at this example, the...
why is electrophilic addition reaction must happen on double
bond ? Look at this example, the oxygen temporary stabilize the
cyclohexane, but why it has to temporary stabilize cyclohexane
first ? It is not a benzene ring that has extra 150 KJ energy due
to conjugate dienes, And why is oxygen carbocation intermediate
cannot attacked by the nucleophilic chloride ion?
8.42 ti 2 OCH ocHs CI OCHg 1 Cl OCH Reaction with HC! yields a cation intermediate that can be...
Activating/Deactivating Substituents Below is a list of different substituents and experimental results from attempted electrophilic aromatic...
Activating/Deactivating Substituents Below is a list of different substituents and experimental results from attempted electrophilic aromatic substitution. PhNR, PHCN PhCHO PhF PhMe PhoMe PhNH Deactivating Activating PhNO, PhSozH Phl PhH PNHAC POH • Is the aromatic ring an [ electrophile / nucleophile ] in these reactions? Which substituents 'activate the ring (i.e. make it more reactive? 0 Alkyl substituents: Activate OR Deactivate o Halide substituents: Activate OR Deactivate o OH, NH substituents: Activate OR Deactivate o carbonyl groups: Activate OR...
why must synthesized crude tertiary alkyl halide be dried carefully with calcium chloride before the distillation...
why must synthesized crude tertiary alkyl halide be dried carefully with calcium chloride before the distillation for purifying purpose? (try to answer what kind of reaction could be happening with water and alkyl halide?)
6. (9 pts) In regards to an electrophilic aromatic substitution reaction, define the 3 compounds shown...
6. (9 pts) In regards to an electrophilic aromatic substitution reaction, define the 3 compounds shown below as either: a) Activating, ortho, para director b) Deactivating, ortho para director, c) Activating, meta director, d) Deactivating, meta director. CH -ОН -N-CH3 CH3 7. Answer a-c for compounds A-F below dos a. (5 pts) Which compound(s) have an aromatic carbocation intermediate if it underwent an Snl or E1 reaction? b. (5 pts) Which compound(s) would have an anti-aromatic carbocation intermediate if it...
identify the preferred site(s) of electrophilic attack on the following compound 1-CH-04 >> ringt r ing...
identify the preferred site(s) of electrophilic attack on the following compound 1-CH-04 >> ringt r ing 2 A) ortho para positions on ring 1 B) meta position on ring 2 C) meta position on ring 1 D) orthopara positions on ring 2 2) The major products) in the nitration of benzoic acid isare) A) nitrobenzene. B) nitroben ene and para-nitrobenzoic acid. C) mixture of the and pre-nitrobenzoic acid. D -nitrobenzoic acid. 3) What is the electrophile in the Friedel-Crafts alkylation...
Consider the two reactions below for the optically active alkyl halide, (R)-2-chloropentane. The first reaction occurs...
Consider the two reactions below for the optically active alkyl halide, (R)-2-chloropentane. The first reaction occurs rapidly at room temperature and gives an optically active product. The second reaction, starting with the same alkyl halide, occurs slowly at room temperature and gives a non-optically active product (racemic mixture). Draw a mechanism (include all H's and lone pairs) for cach reaction and explain how the mechanism leads to the observed results. Hics CHES- CH.OH CH,OH
- + fit to page Page view A Read aloud Synthesize the following compounds from benzene : (10 pts) - + Fit to page Page view A+ 29. In the following reaction, the alkyl halide makes a carbocation intermediate before the electrophilic attack by the aromatic ring Explain why the product is not observed in this reaction. What product is produced? (10 pts) CH
250 ChemActivity 29 Electrophilic Aromatic Substitution no ChemActivity 29 Part A: Electrophilic Aromatic Substitution (What products are formed when a strong electrophile is added to benzene?) Model 1: (review) Electrophilic Addition of HCI Rani o g cyclohexene carbocation intermediate Run 2 U X benzene This product carbocation intermediate DOES NOT Critical Thinking Questions 1 For Rxn I (above) draw curved arrows showing the mechanism of electrophilic addition of HCl. Include an appropriate carbocation intermediate in the box above. Figure 1:...
Draw the major organic product of the following Friedel–Crafts
alkylation. (An excess of benzene is present.)
aw the major organic product of the following Friedel-Crafts alkylation. (An excess of benzene is present.) AICI, Previous ⓧ Give Up & View Solution # Try Again Next Exit Explanation This reaction is an electrophilic aromatic substitution. The aluminum chloride polarizes the chlorine-carbon bond of the alkyl halide, imparting carbocation character (i.e., electrophilicity) to the alkyl group Since an excess of benzene is present,...
why is electrophilic addition reaction must happen on double
bond ? Look at this example, the oxygen temporary stabilize the
cyclohexane, but why it has to temporary stabilize cyclohexane
first ? It is not a benzene ring that has extra 150 KJ energy due
to conjugate dienes, And why is oxygen carbocation intermediate
cannot attacked by the nucleophilic chloride ion?
8.42 ti 2 OCH ocHs CI OCHg 1 Cl OCH Reaction with HC! yields a cation intermediate that can be...
Activating/Deactivating Substituents Below is a list of different substituents and experimental results from attempted electrophilic aromatic substitution. PhNR, PHCN PhCHO PhF PhMe PhoMe PhNH Deactivating Activating PhNO, PhSozH Phl PhH PNHAC POH • Is the aromatic ring an [ electrophile / nucleophile ] in these reactions? Which substituents 'activate the ring (i.e. make it more reactive? 0 Alkyl substituents: Activate OR Deactivate o Halide substituents: Activate OR Deactivate o OH, NH substituents: Activate OR Deactivate o carbonyl groups: Activate OR...
6. (9 pts) In regards to an electrophilic aromatic substitution reaction, define the 3 compounds shown below as either: a) Activating, ortho, para director b) Deactivating, ortho para director, c) Activating, meta director, d) Deactivating, meta director. CH -ОН -N-CH3 CH3 7. Answer a-c for compounds A-F below dos a. (5 pts) Which compound(s) have an aromatic carbocation intermediate if it underwent an Snl or E1 reaction? b. (5 pts) Which compound(s) would have an anti-aromatic carbocation intermediate if it...
identify the preferred site(s) of electrophilic attack on the following compound 1-CH-04 >> ringt r ing 2 A) ortho para positions on ring 1 B) meta position on ring 2 C) meta position on ring 1 D) orthopara positions on ring 2 2) The major products) in the nitration of benzoic acid isare) A) nitrobenzene. B) nitroben ene and para-nitrobenzoic acid. C) mixture of the and pre-nitrobenzoic acid. D -nitrobenzoic acid. 3) What is the electrophile in the Friedel-Crafts alkylation...
Consider the two reactions below for the optically active alkyl halide, (R)-2-chloropentane. The first reaction occurs rapidly at room temperature and gives an optically active product. The second reaction, starting with the same alkyl halide, occurs slowly at room temperature and gives a non-optically active product (racemic mixture). Draw a mechanism (include all H's and lone pairs) for cach reaction and explain how the mechanism leads to the observed results. Hics CHES- CH.OH CH,OH
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