Why doesn't the Br attack the
double bond? How does this reaction occur?
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Why doesn't the Br attack the
double bond? How does this reaction occur?
NBS Br. Me...
This is a question on free radical halogenation. How and why does the bromoethane bond form...
This is a question on free radical halogenation.
How and why does the bromoethane bond form for the 2nd resonance
structure?
3. The allylic bromination of the alkene below with NBS gives four different products. Draw the two initially formed free radical intermediates with any applicable resonance structures, then draw the four products. Indicate which product will be the major product and which you would predict to have the lowest yield. Br, hv ® Ýsa Ś Br sminor 3 &+Br....
Explantion: In a radical allylic bromination of alkenes with NBS reaction, why does allylic bromination occur...
Explantion: In a radical allylic bromination of alkenes with NBS reaction, why does allylic bromination occur instead of alkene bromination? Secondly, why does the more substituted alkene predominate if more than one alkene can form from such a reaction?
Hello, why does this reaction occur? Should not the carbonyl simply be converted to an alcohol...
Hello, why does this reaction occur? Should not the carbonyl
simply be converted to an alcohol and leave the double bond
untouched. According to my lab TA the double bond should be left
untouched.
NaBH Pyridine
a) Draw a chemical equation for the reaction in this lab, clearly indicate the possible stereochemistry...
a) Draw a chemical equation for the reaction in this lab, clearly indicate the possible stereochemistry (R/S) of all potential products (Newman Projection) from cis and trans addition to the double bond of trans-stilbene. (Hint see Expt. 3) Clearly indicate meso compounds if any. Br Br Ph Br Ph Br Br b) Draw a reaction mechanism for the reaction between bromine and trans-stilbene. Clearly shovw the nucleophilic attack of Br- on both carbons of the cyclic bromenium ion and the...
a. Draw the first propagation step for a bromide free radical and the double bond of...
a. Draw the first propagation step for a bromide free radical and the double bond of 1-methylcyclohexene. HINT: One electron from the double bond interacts with the bromide free radical to form a new bond. The other electron from the double bond attaches to one of the carbons. Be sure to use three single-headed arrows, and don't forget to draw the two possible free radical products that will form from this step. Circle the most likely product and explain why...
нс Br СН,ОН HC CH a. Write the rate law for this reaction. How does this...
нс Br СН,ОН HC CH a. Write the rate law for this reaction. How does this compare to the rate law for an SN1 reaction? b. Do you think that both E1 and Sn1 reactions will have similar reaction energy diagrams? Why or why not? 2. Show the mechanism and product or products for an E2 reaction. (Mechanism 9.5 in your text walks you through this example). -CH3 + Hope НАС Сн, CH,CH-OH Br a. What is the rate law...
A student attempted to carry out a substitution reaction using molecule as the substrate. The resulting...
A student attempted to carry out a substitution reaction using molecule as the substrate. The resulting product was molecule. Which nucleophilic substitution occurred --- S_N1 or S_N2 How can you tell The molecule here cannot be used as a substrate for an E2 reaction, but can be for an E1 reaction. Explain why. Be specific --- explain why an E2 reaction cannot occur and how an E1 reaction could occur. Where does the nucleophile attack in an S_N2 reaction Backside...
O- CHE Br CH2 H3C Hac Electrophilic addition of HBr toalkenes yields a bromoalkane. The reaction...
Electrophilic addition of HBr to alkenes yields a bromoalkane. The reaction begins with an attack on the hydrogen of the electrophilic HBr by the electrons of the double bond to give a carbocation. This step follows Markovnikov's rule with the electrophilic H atom adding to the sp2 carbon containing the most hydrogens, leading to the formation of the most stable carbocation (1° < 2° < 3°). If possible, a 1,2-shift of either a neighboring hydride or methyl group can occur...
What does heat do? 7. How did the methyl end up in the product? 8. why...
What does heat do?
7. How did the
methyl end up in the product?
8. why does the methyl add to the beta carbon?
9. Why does the double bond occur?
Thanks!
2 -Œt Pn — РИ proe worked 1. NOC 2 prose work 1 OCH 2 og orkup 10
Why does the last reaction not require heat but the two above it do? 2. Give...
Why does the last reaction not require heat but the two above it
do?
2. Give the appropriate conditions for the following tramsformations. If the temperature is crucial, describe the temperature by either cold or hot. HBr ~ Hoteq cold Br CO2Me 내 MeOC. TH heat CO Me CO2Me CO2Me _CO2Me Me ) و COME heat CO2Me OHC CHO CHO CHO
This is a question on free radical halogenation.
How and why does the bromoethane bond form for the 2nd resonance
structure?
3. The allylic bromination of the alkene below with NBS gives four different products. Draw the two initially formed free radical intermediates with any applicable resonance structures, then draw the four products. Indicate which product will be the major product and which you would predict to have the lowest yield. Br, hv ® Ýsa Ś Br sminor 3 &+Br....
Hello, why does this reaction occur? Should not the carbonyl
simply be converted to an alcohol and leave the double bond
untouched. According to my lab TA the double bond should be left
untouched.
NaBH Pyridine
a) Draw a chemical equation for the reaction in this lab, clearly indicate the possible stereochemistry (R/S) of all potential products (Newman Projection) from cis and trans addition to the double bond of trans-stilbene. (Hint see Expt. 3) Clearly indicate meso compounds if any. Br Br Ph Br Ph Br Br b) Draw a reaction mechanism for the reaction between bromine and trans-stilbene. Clearly shovw the nucleophilic attack of Br- on both carbons of the cyclic bromenium ion and the...
нс Br СН,ОН HC CH a. Write the rate law for this reaction. How does this compare to the rate law for an SN1 reaction? b. Do you think that both E1 and Sn1 reactions will have similar reaction energy diagrams? Why or why not? 2. Show the mechanism and product or products for an E2 reaction. (Mechanism 9.5 in your text walks you through this example). -CH3 + Hope НАС Сн, CH,CH-OH Br a. What is the rate law...
A student attempted to carry out a substitution reaction using molecule as the substrate. The resulting product was molecule. Which nucleophilic substitution occurred --- S_N1 or S_N2 How can you tell The molecule here cannot be used as a substrate for an E2 reaction, but can be for an E1 reaction. Explain why. Be specific --- explain why an E2 reaction cannot occur and how an E1 reaction could occur. Where does the nucleophile attack in an S_N2 reaction Backside...
What does heat do?
7. How did the
methyl end up in the product?
8. why does the methyl add to the beta carbon?
9. Why does the double bond occur?
Thanks!
2 -Œt Pn — РИ proe worked 1. NOC 2 prose work 1 OCH 2 og orkup 10
Why does the last reaction not require heat but the two above it
do?
2. Give the appropriate conditions for the following tramsformations. If the temperature is crucial, describe the temperature by either cold or hot. HBr ~ Hoteq cold Br CO2Me 내 MeOC. TH heat CO Me CO2Me CO2Me _CO2Me Me ) و COME heat CO2Me OHC CHO CHO CHO
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