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2. Which carbon would the Br of HBr add to if the following unsymmetrical alkenes were...
2) Order the following alkenes from most stable to least stable Нас Нас с-сн, н,с Hас +C- Нас н CHs -CH3 H Hе mos...
2) Order the following alkenes from most stable to least stable Нас Нас с-сн, н,с Hас +C- Нас н CHs -CH3 H Hе most stable least stable (a) I (b) I (c) I ll (d) 7) Order the following C-H bonds from strongest to weakest. strongest weakest (a) (b) (c) II (d) 8) Which of the following is represents the lowest energy transition state for the addition of BH, to 2-methyl-1-propene? quCH «сHs нСи Нас (b) (a) Нив--н H H...
Question 2: Determine in the following examples if the base is strong enough to deprotonate the...
Question 2: Determine in the following examples if the base is strong enough to deprotonate the terminal alkyne. сH, нс. t-BuOK + Cн Question 3: A terminal alkyne is prepared by treating the dihalide with excess (xs) sodium amide, followed by water. Predict the major product and draw a mechanism for its formation: Br 1) xs NaNHNH 2) Hо Br Identify reagents that you could use to achieve the following transformations: CH3 Нас Н,с CH3 CH3 HyC Н.с CHs CH3...
CH3 H2SO4 н,с. OH сH, 2. OTs SH NaSH н, с сH, OTs No reaction H,с. Cн, o CH3 HBr Br HO H,с CH Provide the reagents nece...
CH3 H2SO4 н,с. OH сH, 2. OTs SH NaSH н, с сH, OTs No reaction H,с. Cн, o CH3 HBr Br HO H,с CH Provide the reagents necessary to carry out the following conversions. Br SH NadH NasH
Propose mechanisms consistent with the following reactions 8-48 H.SO н.о Br HBr ъ) Он (а) ROOR...
Propose mechanisms consistent with the following reactions 8-48 H.SO н.о Br HBr ъ) Он (а) ROOR Br СHBE, Вг Br Вг HЕr (d) NaOH осH CH, Cl Вr НС Br Br CH CH OH Cн CH, Он Н н'. Н,о Он Н "сн CH, CH,CH CH,CH Он н' (g) CH Oн осн, н CH—С-С (h) 2 н Н Н Н
Propose mechanisms consistent with the following reactions 8-48 H.SO н.о Br HBr ъ) Он (а) ROOR Br СHBE, Вг Br...
Draw a detailed mechanism for the following transformation 1. Br. Br HBr HO 2. What are the major product (s) formed in...
Draw a detailed mechanism for the following transformation 1. Br. Br HBr HO 2. What are the major product (s) formed in the following substitution reaction? Draw as Fisher projections CH;CH2ОH CH-CHз Нас— вr CH2CH2CH3 Draw the mechanism for the following reaction. 3. HO Br Draw the major organic product(s) produced in the following reaction as Fischer projection. 4. CHз ОСHЗ Н NaN3 Н. -CH3 Н- Br DMSO CH3 Draw the mechanism for the following reaction to demonstrate how the...
2 problems (Review Topical (References Br н,слен . CH2Cl2 Electrophilic addition of bromine, Bry, to alkenes...
2 problems
(Review Topical (References Br н,слен . CH2Cl2 Electrophilic addition of bromine, Bry, to alkenes yields a 1,2 dibromoalkane. The reaction proceeds through a cyclic intermediate known as a bromonium ion. The reaction occurs in an anhydrous solvent such as CH CI In the second step of the reaction, bromide is the nucleophile and attacks at one of the carbons of the bromonium ion to yield the product Due to stenc clashes, the bromide ion always attacks the carbon...
CHz + PhP-CHCH3 - CH3 НАС НАС Aldehydes and ketones are converted into alkenes by means...
CHz + PhP-CHCH3 - CH3 НАС НАС Aldehydes and ketones are converted into alkenes by means of a direct nucleophilic addition called the Wittig reaction phosphorane, adds to an aldehyde/ketone to give a four-membered cyclic intermediate called an oxaphosphetane. The decomposes to release triphenylphosphine oxide and an alkene. The ylide is formed by reaction of triphenylphosphine, a good nucleophile, with a primary alkyl halide in an Sy2 react base, such as butyllithium. The carbonyl carbon and the carbon originally bonded...
having trouble with R and S configuration, can someone help out with this sheet? 17 Br>Cl'7...
having trouble with R and S configuration, can someone help out
with this sheet?
17 Br>Cl'7 S"7 F>ONTO77i77 H 1. Determine the configuration (R or S) of each of the following molecules: (Ph phenyl, a benzene ring as a group) CH-CH3 b. CHs с. но NH2 d. он COOH Ph H Hас CH2CH3 H2N CH&CH NH2 NH2 f. Ph CH3 Ph CHs h. H i. OH c lCOOH н.сн,с F Н.с NH2 h. COOH CHs CH2CH H2N 2. Label the...
please answer questions 9-12 Question 9 1 pts Which of the following statements describes the reactivity...
please answer questions 9-12
Question 9 1 pts Which of the following statements describes the reactivity of alkynes? An alkyne is an electron-rich molecule and therefore reacts as a nucleophile. When a symmetrical internal alkyne reacts with HBr, two products are formed. Unlike alkenes, alkynes fail to undergo electrophilic addition reactions The o bonds of alkynes are greater in energy than the rt bonds and, therefore, are more reactive Alkynes react as electrophiles, whereas alkenes react as nucleophiles What is...
Which of the following is true for reactions A, B, and C? 8. CH3CH2CH,+ Br CH,CH2CH2...
Which of the following is true for reactions A, B, and C? 8. CH3CH2CH,+ Br CH,CH2CH2 + HBr CH CH2CH, + Br CH CH CH3 + HBr CH CH:CH; + Cl CH,CH-СH, + HCI A C a. Reaction A has the lowest activation energy b. Reaction B is the fastest reaction c. Reaction C has the lowest activation energy d. Reaction C is the slowest reaction 9. Which of the following statements is false? a. The rates of Sy1 reactions...
2) Order the following alkenes from most stable to least stable Нас Нас с-сн, н,с Hас +C- Нас н CHs -CH3 H Hе most stable least stable (a) I (b) I (c) I ll (d) 7) Order the following C-H bonds from strongest to weakest. strongest weakest (a) (b) (c) II (d) 8) Which of the following is represents the lowest energy transition state for the addition of BH, to 2-methyl-1-propene? quCH «сHs нСи Нас (b) (a) Нив--н H H...
Question 2: Determine in the following examples if the base is strong enough to deprotonate the terminal alkyne. сH, нс. t-BuOK + Cн Question 3: A terminal alkyne is prepared by treating the dihalide with excess (xs) sodium amide, followed by water. Predict the major product and draw a mechanism for its formation: Br 1) xs NaNHNH 2) Hо Br Identify reagents that you could use to achieve the following transformations: CH3 Нас Н,с CH3 CH3 HyC Н.с CHs CH3...
CH3 H2SO4 н,с. OH сH, 2. OTs SH NaSH н, с сH, OTs No reaction H,с. Cн, o CH3 HBr Br HO H,с CH Provide the reagents necessary to carry out the following conversions. Br SH NadH NasH
Propose mechanisms consistent with the following reactions 8-48 H.SO н.о Br HBr ъ) Он (а) ROOR Br СHBE, Вг Br Вг HЕr (d) NaOH осH CH, Cl Вr НС Br Br CH CH OH Cн CH, Он Н н'. Н,о Он Н "сн CH, CH,CH CH,CH Он н' (g) CH Oн осн, н CH—С-С (h) 2 н Н Н Н
Propose mechanisms consistent with the following reactions 8-48 H.SO н.о Br HBr ъ) Он (а) ROOR Br СHBE, Вг Br...
Draw a detailed mechanism for the following transformation 1. Br. Br HBr HO 2. What are the major product (s) formed in the following substitution reaction? Draw as Fisher projections CH;CH2ОH CH-CHз Нас— вr CH2CH2CH3 Draw the mechanism for the following reaction. 3. HO Br Draw the major organic product(s) produced in the following reaction as Fischer projection. 4. CHз ОСHЗ Н NaN3 Н. -CH3 Н- Br DMSO CH3 Draw the mechanism for the following reaction to demonstrate how the...
2 problems
(Review Topical (References Br н,слен . CH2Cl2 Electrophilic addition of bromine, Bry, to alkenes yields a 1,2 dibromoalkane. The reaction proceeds through a cyclic intermediate known as a bromonium ion. The reaction occurs in an anhydrous solvent such as CH CI In the second step of the reaction, bromide is the nucleophile and attacks at one of the carbons of the bromonium ion to yield the product Due to stenc clashes, the bromide ion always attacks the carbon...
CHz + PhP-CHCH3 - CH3 НАС НАС Aldehydes and ketones are converted into alkenes by means of a direct nucleophilic addition called the Wittig reaction phosphorane, adds to an aldehyde/ketone to give a four-membered cyclic intermediate called an oxaphosphetane. The decomposes to release triphenylphosphine oxide and an alkene. The ylide is formed by reaction of triphenylphosphine, a good nucleophile, with a primary alkyl halide in an Sy2 react base, such as butyllithium. The carbonyl carbon and the carbon originally bonded...
having trouble with R and S configuration, can someone help out
with this sheet?
17 Br>Cl'7 S"7 F>ONTO77i77 H 1. Determine the configuration (R or S) of each of the following molecules: (Ph phenyl, a benzene ring as a group) CH-CH3 b. CHs с. но NH2 d. он COOH Ph H Hас CH2CH3 H2N CH&CH NH2 NH2 f. Ph CH3 Ph CHs h. H i. OH c lCOOH н.сн,с F Н.с NH2 h. COOH CHs CH2CH H2N 2. Label the...
please answer questions 9-12
Question 9 1 pts Which of the following statements describes the reactivity of alkynes? An alkyne is an electron-rich molecule and therefore reacts as a nucleophile. When a symmetrical internal alkyne reacts with HBr, two products are formed. Unlike alkenes, alkynes fail to undergo electrophilic addition reactions The o bonds of alkynes are greater in energy than the rt bonds and, therefore, are more reactive Alkynes react as electrophiles, whereas alkenes react as nucleophiles What is...
Which of the following is true for reactions A, B, and C? 8. CH3CH2CH,+ Br CH,CH2CH2 + HBr CH CH2CH, + Br CH CH CH3 + HBr CH CH:CH; + Cl CH,CH-СH, + HCI A C a. Reaction A has the lowest activation energy b. Reaction B is the fastest reaction c. Reaction C has the lowest activation energy d. Reaction C is the slowest reaction 9. Which of the following statements is false? a. The rates of Sy1 reactions...
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