Consider the above aldol reaction with proline as a catalyst.
a. Please draw the Zimmerman-Traxler like transition state for this reaction.
b. Is the favored product syn or anti according to the transition state?
Thank you in advance for your help
Homework Answers
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Consider the above aldol reaction with proline as a
catalyst.
a. Please draw the Zimmerman-Traxler like...
please help with both parts of question number one. thanks! 1. For each reaction below, draw...
please help with both parts of question number one.
thanks!
1. For each reaction below, draw the reaction mechanism for the rate determining step. On the starting structures, draw all appropriate arrows to indicate the flow of electrons. Fill in the box above the arrows with the reaction mechanism as SN1 or SN2. Draw the first key transition state product(s). Use dotted lines to indicate bonds that are in the process of being broken or made. Write all formal charges....
2). Consider the following intramolecular S2 reaction. no ♡ + HI A) (5 pts) Use the...
2). Consider the following intramolecular S2 reaction. no ♡ + HI A) (5 pts) Use the table of Bond Dissociation Enthalpies (at the back of the exam) to calculate the approximate ΔΗπη. B) (3 pts) Is the reaction endothermic or exothermic? Why? C) (6 pts) Draw the Reaction Energy Coordinate Diagram. Label the axes, reactant(s), product(s), transition state(s), intermediate(s), activation energy, and reaction enthalpy. D) (3 pts) In regards to entropy, would you expect the reaction to be favorable, or...
Please include complete answers only, thank you. a. Draw the structural formula of each of the...
Please include complete answers only, thank you.
a. Draw the structural formula of each of the following compounds. b. According to the character of the bold, enlarged carbon(s) label each compound "basic", "electrophilic" or "nucleophilic". c. Diagram electron pushing (resonance), and inductive effects d. Give a brief narrative (one or two short sentences) to explain what your diagrams show regarding your choice (base, electrophile, or nucleophile): 16% (2% each) (CH3)2N=C(CH3)2CI (CH3)2C=CHCH=CHN(CH3)2 CH2=CH(OH) H(C=NH)CH=CH2 CH2=CHCHENH KCH3CH(C=O)CH3 CH3CH2(C=O)Br CH3CH2(C=O)H
4. An energy diagram for electrophilic aromatic substitution of benzene with Br2 with FeBr3 as catalyst...
4. An energy diagram for electrophilic aromatic substitution of benzene with Br2 with FeBr3 as catalyst below. The rate-limiting step is formation of the sigma complex (Step 1). Generally, any factor that stabilizes the sigma complex also stabilizes the transition-state leading to that complex. This effect leads to a lower transition-state energy and a faster reaction. rate-limiting transition state reactants + Br + FeBrz Η Br FeBr + O energy intermediate products Br + HBr + FeBr 3 -45 kJ/mol...
4. [12 pts] Propose mechanisms for the formation of all 3 products shown in the reaction...
4. [12 pts] Propose mechanisms for the formation of all 3 products shown in the reaction below: (draw curved arrows, intermediates, and resonance structures if necessary. NO NEED FOR TRANSITION STATES! CH CH CH CH Br Heat CH,CH,OH OCH.CH Mechanism.14 points) Mechanism 2 points) Mechanism.3 14 points) 5. [14 pts] Provide the major products of reacting the alkene shown in the middle of the scheme below with all the reagents independently. Draw the products' structures in the corresponding table below...
Please help!! 7:53 PM Wed Jul 29 61% Т. + D 3. Reactions: (24 pts). Draw...
Please help!!
7:53 PM Wed Jul 29 61% Т. + D 3. Reactions: (24 pts). Draw the structure of the expected organic product(s) formed in the following reactions including correct stereochemistry. If the product is racemic write both isomers or write racemic. Assume all reagents listed are present in excess unless otherwise noted. If no reaction occurs, state No Reaction'. Brz, CH3COOH M) NH N) agten 1) DCC 2) NH,CH,COOCH 3) Hz, Pd PS5, heat P) H 1) NH3, HCN...
please help me with Organic Chemistry/Alkenes problems. Thank you! Directions: Place your answers to the following...
please help me with Organic Chemistry/Alkenes problems. Thank you!
Directions: Place your answers to the following questions in the spaces provided. 1. A common problem in the acid-catalyzed hydration of alkenes is the formation of an ether byproduct. Show the formation of the ether byproduct in relation to the reaction below by providing a curved-arrow mechanism for its formation. (2 pts) H30+ Н,0 OH Ans. 2. Which is the correct sequence of steps necessary to complete the following reaction? он...
please Answer in Details showing all the steps. Thank you Look at the following reaction: Toluene...
please Answer in Details showing all the steps.
Thank you
Look at the following reaction: Toluene OH + CH3OH OCH3 + H2O a) What is the effect of each of the given changes (see next page) on the rate of the reaction? The possible answers are: Increases, decreases, remains the same or no more reaction. 1- Decreasing the concentration of CH,OH 2-Using a Dean-Stark apparatus (used to remove water from the reaction mixture) 3- Adding H,SO, to the reaction mixture...
Please complete for Tuesday, we will go through the questions and mark them in class. pg 156 - 4.23,...
Please complete for Tuesday, we will go through the questions and mark them in class. pg 156 - 4.23, 4.24, 4.26 pg 170 - 4.29, 4.31, pg 171-4.36 pg 175 - 4.59 pg 176- 4.74, 4.75, 4.80 pg 177-4.81, 4.82 pg 188- 5.1, 5.4, 5.5, 5.6, 5.11 - Using Table 5.1 pg 198-5.22, 5.25 pg 203 - 5.29 pg 206 - 5.37 pg 209 - 5.39 pg 2.14 5.61 pg 235-6.11, 6.14, 6.16 156 CHAPTER 4 Introduction to Organic Compounds...
please help with both parts of question number one.
thanks!
1. For each reaction below, draw the reaction mechanism for the rate determining step. On the starting structures, draw all appropriate arrows to indicate the flow of electrons. Fill in the box above the arrows with the reaction mechanism as SN1 or SN2. Draw the first key transition state product(s). Use dotted lines to indicate bonds that are in the process of being broken or made. Write all formal charges....
2). Consider the following intramolecular S2 reaction. no ♡ + HI A) (5 pts) Use the table of Bond Dissociation Enthalpies (at the back of the exam) to calculate the approximate ΔΗπη. B) (3 pts) Is the reaction endothermic or exothermic? Why? C) (6 pts) Draw the Reaction Energy Coordinate Diagram. Label the axes, reactant(s), product(s), transition state(s), intermediate(s), activation energy, and reaction enthalpy. D) (3 pts) In regards to entropy, would you expect the reaction to be favorable, or...
Please include complete answers only, thank you.
a. Draw the structural formula of each of the following compounds. b. According to the character of the bold, enlarged carbon(s) label each compound "basic", "electrophilic" or "nucleophilic". c. Diagram electron pushing (resonance), and inductive effects d. Give a brief narrative (one or two short sentences) to explain what your diagrams show regarding your choice (base, electrophile, or nucleophile): 16% (2% each) (CH3)2N=C(CH3)2CI (CH3)2C=CHCH=CHN(CH3)2 CH2=CH(OH) H(C=NH)CH=CH2 CH2=CHCHENH KCH3CH(C=O)CH3 CH3CH2(C=O)Br CH3CH2(C=O)H
4. An energy diagram for electrophilic aromatic substitution of benzene with Br2 with FeBr3 as catalyst below. The rate-limiting step is formation of the sigma complex (Step 1). Generally, any factor that stabilizes the sigma complex also stabilizes the transition-state leading to that complex. This effect leads to a lower transition-state energy and a faster reaction. rate-limiting transition state reactants + Br + FeBrz Η Br FeBr + O energy intermediate products Br + HBr + FeBr 3 -45 kJ/mol...
4. [12 pts] Propose mechanisms for the formation of all 3 products shown in the reaction below: (draw curved arrows, intermediates, and resonance structures if necessary. NO NEED FOR TRANSITION STATES! CH CH CH CH Br Heat CH,CH,OH OCH.CH Mechanism.14 points) Mechanism 2 points) Mechanism.3 14 points) 5. [14 pts] Provide the major products of reacting the alkene shown in the middle of the scheme below with all the reagents independently. Draw the products' structures in the corresponding table below...
Please help!!
7:53 PM Wed Jul 29 61% Т. + D 3. Reactions: (24 pts). Draw the structure of the expected organic product(s) formed in the following reactions including correct stereochemistry. If the product is racemic write both isomers or write racemic. Assume all reagents listed are present in excess unless otherwise noted. If no reaction occurs, state No Reaction'. Brz, CH3COOH M) NH N) agten 1) DCC 2) NH,CH,COOCH 3) Hz, Pd PS5, heat P) H 1) NH3, HCN...
please help me with Organic Chemistry/Alkenes problems. Thank you!
Directions: Place your answers to the following questions in the spaces provided. 1. A common problem in the acid-catalyzed hydration of alkenes is the formation of an ether byproduct. Show the formation of the ether byproduct in relation to the reaction below by providing a curved-arrow mechanism for its formation. (2 pts) H30+ Н,0 OH Ans. 2. Which is the correct sequence of steps necessary to complete the following reaction? он...
please Answer in Details showing all the steps.
Thank you
Look at the following reaction: Toluene OH + CH3OH OCH3 + H2O a) What is the effect of each of the given changes (see next page) on the rate of the reaction? The possible answers are: Increases, decreases, remains the same or no more reaction. 1- Decreasing the concentration of CH,OH 2-Using a Dean-Stark apparatus (used to remove water from the reaction mixture) 3- Adding H,SO, to the reaction mixture...
Please complete for Tuesday, we will go through the questions and mark them in class. pg 156 - 4.23, 4.24, 4.26 pg 170 - 4.29, 4.31, pg 171-4.36 pg 175 - 4.59 pg 176- 4.74, 4.75, 4.80 pg 177-4.81, 4.82 pg 188- 5.1, 5.4, 5.5, 5.6, 5.11 - Using Table 5.1 pg 198-5.22, 5.25 pg 203 - 5.29 pg 206 - 5.37 pg 209 - 5.39 pg 2.14 5.61 pg 235-6.11, 6.14, 6.16 156 CHAPTER 4 Introduction to Organic Compounds...
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