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Which one of the following substituents is activating and othe-para directing in electrophilic aromatic substitution reactions?...
Which of the following sets of substituents are all ortho/para directing in electrophilic aromatic substitution reactions?...
Which of the following sets of substituents are all ortho/para directing in electrophilic aromatic substitution reactions? O CN, NO2, COCH3 O CI, OH, CH3 OBr, OH, COCH3 OCI, CH3. CN
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...
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...
Question 1 Identify all compounds below that CANNOT be made by the electrophilic aromatic substitution reactions...
Question 1 Identify all compounds below that CANNOT be made by the electrophilic aromatic substitution reactions introduced in Sections 18.1-18.6 SOH Question 2. Match each pair of structures with the appropriate term. KEY 1 = Constitutional isomers 2 - Diastereomers 0 000 3 = Different conformations 4 = Resonance structures 5 = Bond-shift isomers Question 3. In this reaction, FeBrz is acting as a and the complex that is formed will react with benzene as a/n :Br: : Br-Br: Br-Br-Fe-Br:...
Question1: Introduction Three aromatic compounds that have ortho-para directing and activating substituents will be brominated. The...
Question1:
Introduction Three aromatic compounds that have ortho-para directing and activating substituents will be brominated. The extent of activation will be judged by the number of bromine atoms that add to the benzene ring in each case. For each of the compounds shown below you will work out if a mono- di- or tri- brominated derivative formed following treatment with acetic acid and bromine in hydrobromic acid. This will be determined by measuring the melting point and interpreting the H...
& Which one of the following substitution reactions will be accompanied by . a) complete racemisation?...
& Which one of the following substitution reactions will be accompanied by . a) complete racemisation? by complete reversal of configuration ? a parcial racemisation ! ? ! - CH₂ - CH₂ - CHT - Br solvent (2) (30) 2) CH₂ - CH₂ - CH₂ - C Br solvent (?) What kind of solvent (protic, aprotic) would a OH ch OH you prefer to use in each of these reactions
Multiple choice questions I. Which ONE of the following compounds is an isolated diene? a) 4-methyl-13-heptadiene...
Multiple choice questions I. Which ONE of the following compounds is an isolated diene? a) 4-methyl-13-heptadiene b) 5-methyl-2,6-heptadiene c) 2-methyl-2.4-heptadiene d) 5-methyl-2.3-heptadiene e) 13-cyclohexadiene 2. Which ONE of the following compounds will liberate the largest heat upon hydrogenation? 3. How many of the molecules below are aromatic? Identify and count. 4. How many electrons are participating in aromaticity? :N H a) 2 b) 4 c)6 d) 8 Which of the following sets of substituents are all activating groups in electrophilic...
organic chemistry 1.1 pt) Which reagent would you use to effect the following transformation of a...
organic chemistry
1.1 pt) Which reagent would you use to effect the following transformation of a diol into a keto acid? ОН Reagent? CH,CHCH,CH,CH,OH - CH,CCH,CH,сон a) Jones(H2Cr2O7) b) Tollens c) mCPBA d) Collins(PCC) e) LiAlH4 2.(2 pts) Circle the TWO compounds that yield a stable Grignard reagent when treated with magnesium in ether. Br CHÚC HỌC=CH- CH,OH HN 3.(2 pts each) Reactions. Complete each reaction shown here. HỌC=CH- + HC=CH- -CH OH он 1. CH CH MgBrCH,CH,CH=CHCCH2CH3 2.H2O Сн,...
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:...
Which of the following sets of substituents are all ortho/para directing in electrophilic aromatic substitution reactions? O CN, NO2, COCH3 O CI, OH, CH3 OBr, OH, COCH3 OCI, CH3. CN
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...
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...
Question 1 Identify all compounds below that CANNOT be made by the electrophilic aromatic substitution reactions introduced in Sections 18.1-18.6 SOH Question 2. Match each pair of structures with the appropriate term. KEY 1 = Constitutional isomers 2 - Diastereomers 0 000 3 = Different conformations 4 = Resonance structures 5 = Bond-shift isomers Question 3. In this reaction, FeBrz is acting as a and the complex that is formed will react with benzene as a/n :Br: : Br-Br: Br-Br-Fe-Br:...
Question1:
Introduction Three aromatic compounds that have ortho-para directing and activating substituents will be brominated. The extent of activation will be judged by the number of bromine atoms that add to the benzene ring in each case. For each of the compounds shown below you will work out if a mono- di- or tri- brominated derivative formed following treatment with acetic acid and bromine in hydrobromic acid. This will be determined by measuring the melting point and interpreting the H...
& Which one of the following substitution reactions will be accompanied by . a) complete racemisation? by complete reversal of configuration ? a parcial racemisation ! ? ! - CH₂ - CH₂ - CHT - Br solvent (2) (30) 2) CH₂ - CH₂ - CH₂ - C Br solvent (?) What kind of solvent (protic, aprotic) would a OH ch OH you prefer to use in each of these reactions
Multiple choice questions I. Which ONE of the following compounds is an isolated diene? a) 4-methyl-13-heptadiene b) 5-methyl-2,6-heptadiene c) 2-methyl-2.4-heptadiene d) 5-methyl-2.3-heptadiene e) 13-cyclohexadiene 2. Which ONE of the following compounds will liberate the largest heat upon hydrogenation? 3. How many of the molecules below are aromatic? Identify and count. 4. How many electrons are participating in aromaticity? :N H a) 2 b) 4 c)6 d) 8 Which of the following sets of substituents are all activating groups in electrophilic...
organic chemistry
1.1 pt) Which reagent would you use to effect the following transformation of a diol into a keto acid? ОН Reagent? CH,CHCH,CH,CH,OH - CH,CCH,CH,сон a) Jones(H2Cr2O7) b) Tollens c) mCPBA d) Collins(PCC) e) LiAlH4 2.(2 pts) Circle the TWO compounds that yield a stable Grignard reagent when treated with magnesium in ether. Br CHÚC HỌC=CH- CH,OH HN 3.(2 pts each) Reactions. Complete each reaction shown here. HỌC=CH- + HC=CH- -CH OH он 1. CH CH MgBrCH,CH,CH=CHCCH2CH3 2.H2O Сн,...
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:...
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