Organic chemistry
1) Which reagents will have reacted together to form the Diels-Alder adducts below? Clearly indicate any relevant stereochemical information.
2) a) find the product without stereochemistry
b) find the major product and its enantiomers with stereochemistry
c) explain if the product is exo or endo 
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Draw the mechanisms that explain the formation of the two products below from the one starting...
Draw the mechanisms that explain the formation of the two products below from the one starting material. Show all steps and arrows (6 pts) H-SO4 heat H3C он CH3 CH3 Diels-Alder reactions involve some further stereochemical considerations that we did not talk about. Mainly, these are the formation of the endo and the exo products (starting page 361 of the book). Using the example below, explain the difference between the endo and the exo products. (5 pts) Draw mechanisms and...
Consider the Diels-Alder cycloaddition reaction below and complete parts (a)-(b) below.
Consider the Diels-Alder cycloaddition reaction below and complete parts (a)-(b) below. D = deuterium = 2H (a) Draw the major regioisomer (or in other words, constitutional isomer) expected to form. Also, draw appropriate resonance structures to explain why only one constitutional isomer is expected to form. Discuss the interactions between the diene and dienophile that govern this constitutional isomer being the only one expected. (b) Redraw the regioisomer from part (a) and show the appropriate stereochemistry using correct dash/wedge notation expected for the...
here are several regio- and stereochemical questions to be considered here: 1) Orientation of the dienophile...
here are several regio- and stereochemical questions
to be considered here: 1) Orientation of the dienophile relative to
the diene: forming the endo or exo product (ester toward diene ?
system or away from diene ? system)? forming the \"ortho\" or
\"meta\" product (relationship between ester and dimethylamino
groups in final product)? 2) Relative stereochemistry between the
dimethylamino group, the ester group, the methyl group, and the
deuterium atom in the final product?
Draw one enantiomer of the major product...
best will be rated thank you 3. Considering what you learned about the difference between the...
best will be rated thank you
3. Considering what you learned about the difference between the formation of exo and endo products during Diels-Alder reactions, what conditions (i.e. - reaction temperature, time, etc.) would you use while running the reaction below to form the product on the right as the major product? Cyclopentadine
draw the structure of the major product of the following diels-alder reaction. clearly indicate relative stereochemistry....
draw the structure of the major product of the following
diels-alder reaction. clearly indicate relative stereochemistry. b)
use resonance hybrid structures for regiochemistry (to explain
it)
What the product of the D-A reaction? Stereochemistry (1enantiome) Explain regiochemistry using resonance hybrid structured
1. Draw in the structure of a diene and a dienophile that would do the Diels-Alder...
1. Draw in the structure of a diene and a dienophile that would do the Diels-Alder reaction. The diene should contain one (E)-alkene and the dienophile should contain one ester. Major Product heat 2. Draw the major product in the box. Indicate stereochemistry with dashes and wedges. If the compound is racemic, write "+/-", and if it is meso, indicate this. 3. Are there any other regioisomers that could form in this reaction? Explain. 4. Are there any other stereoisomers...
EXPERIMENT 2A DIELS-ALDER REACTION OF ANTHRACENE REFERENCES Pavia et al (4/e): Tech. 6.1/6.2, 7.2-7.4 Klein (1/e)...
EXPERIMENT 2A DIELS-ALDER REACTION OF ANTHRACENE REFERENCES Pavia et al (4/e): Tech. 6.1/6.2, 7.2-7.4 Klein (1/e) pp. 784-792 EQUATION heat Diels-Alder Adduct 9,30-dihydroanthracene-9,10- endo-o B-seccinic anhydride mp 262264 PROCEDURE Place 0.200 grams of anthracene and an equal molar amount of maleic anhydride in 5 mL of xylenes in a 10-mL round-bottom flask with a magnetic stir bar. Attach a water-cooled condenser and reflux for 60 minutes. Allow the solution to cool to room temperature and then place the flask in...
2. When both the diene and dienophile are unsymmetrical, then regiochemistry becomes an issue. In this...
2. When both the diene and dienophile are unsymmetrical, then regiochemistry becomes an issue. In this case, it is helpful to remember that when you number the diene and dienophile, that carbon 1 of the diene can either attach to carbon 6 or to carbon 5 of the dienophile: 1 1 2 4 2 6 2 5 1 5 3 3 5 3 6 4 4 In on top of this, you still need to think about the different possible...
Can you also go into detail about drawing the HOMO and LUMO, like how to know...
Can you also go into detail about drawing the HOMO and LUMO,
like how to know how many molecular orbitals there should be and
how many orbitals I should draw? Thanks!
LUH III. (16 pts). The Diels-Alder reaction of 1,3-cyclopentadiene with maleic anhydride (A) gives B as the major product. В a. (4 pts). Can product B be designated endo or exo? Explain b. (8 pts). Draw the highest occupied and lowest unoccupied molecular orbitals of the diene and of...
please explain as well, thank you. (8) 1. Draw all the molecular orbitals for the X-system of the allyl anion. Indic...
please explain as well, thank you.
(8) 1. Draw all the molecular orbitals for the X-system of the allyl anion. Indicate which orbital is the HOMO. (20) 2. Provide reasonable product structures for the following reactions. Indicate clearly if you expect one isomer to predominate. NBS/ROOH D-Br (1 mg) +25°C (1g) -40 °C ) Br (1 e -78 "C (12) 3. Provide product structures for the following Diels-Alder reactions. The second Diels-Alder product eliminates a neutral substance upon further heating....
Draw the mechanisms that explain the formation of the two products below from the one starting material. Show all steps and arrows (6 pts) H-SO4 heat H3C он CH3 CH3 Diels-Alder reactions involve some further stereochemical considerations that we did not talk about. Mainly, these are the formation of the endo and the exo products (starting page 361 of the book). Using the example below, explain the difference between the endo and the exo products. (5 pts) Draw mechanisms and...
here are several regio- and stereochemical questions
to be considered here: 1) Orientation of the dienophile relative to
the diene: forming the endo or exo product (ester toward diene ?
system or away from diene ? system)? forming the \"ortho\" or
\"meta\" product (relationship between ester and dimethylamino
groups in final product)? 2) Relative stereochemistry between the
dimethylamino group, the ester group, the methyl group, and the
deuterium atom in the final product?
Draw one enantiomer of the major product...
best will be rated thank you
3. Considering what you learned about the difference between the formation of exo and endo products during Diels-Alder reactions, what conditions (i.e. - reaction temperature, time, etc.) would you use while running the reaction below to form the product on the right as the major product? Cyclopentadine
draw the structure of the major product of the following
diels-alder reaction. clearly indicate relative stereochemistry. b)
use resonance hybrid structures for regiochemistry (to explain
it)
What the product of the D-A reaction? Stereochemistry (1enantiome) Explain regiochemistry using resonance hybrid structured
1. Draw in the structure of a diene and a dienophile that would do the Diels-Alder reaction. The diene should contain one (E)-alkene and the dienophile should contain one ester. Major Product heat 2. Draw the major product in the box. Indicate stereochemistry with dashes and wedges. If the compound is racemic, write "+/-", and if it is meso, indicate this. 3. Are there any other regioisomers that could form in this reaction? Explain. 4. Are there any other stereoisomers...
EXPERIMENT 2A DIELS-ALDER REACTION OF ANTHRACENE REFERENCES Pavia et al (4/e): Tech. 6.1/6.2, 7.2-7.4 Klein (1/e) pp. 784-792 EQUATION heat Diels-Alder Adduct 9,30-dihydroanthracene-9,10- endo-o B-seccinic anhydride mp 262264 PROCEDURE Place 0.200 grams of anthracene and an equal molar amount of maleic anhydride in 5 mL of xylenes in a 10-mL round-bottom flask with a magnetic stir bar. Attach a water-cooled condenser and reflux for 60 minutes. Allow the solution to cool to room temperature and then place the flask in...
2. When both the diene and dienophile are unsymmetrical, then regiochemistry becomes an issue. In this case, it is helpful to remember that when you number the diene and dienophile, that carbon 1 of the diene can either attach to carbon 6 or to carbon 5 of the dienophile: 1 1 2 4 2 6 2 5 1 5 3 3 5 3 6 4 4 In on top of this, you still need to think about the different possible...
Can you also go into detail about drawing the HOMO and LUMO,
like how to know how many molecular orbitals there should be and
how many orbitals I should draw? Thanks!
LUH III. (16 pts). The Diels-Alder reaction of 1,3-cyclopentadiene with maleic anhydride (A) gives B as the major product. В a. (4 pts). Can product B be designated endo or exo? Explain b. (8 pts). Draw the highest occupied and lowest unoccupied molecular orbitals of the diene and of...
please explain as well, thank you.
(8) 1. Draw all the molecular orbitals for the X-system of the allyl anion. Indicate which orbital is the HOMO. (20) 2. Provide reasonable product structures for the following reactions. Indicate clearly if you expect one isomer to predominate. NBS/ROOH D-Br (1 mg) +25°C (1g) -40 °C ) Br (1 e -78 "C (12) 3. Provide product structures for the following Diels-Alder reactions. The second Diels-Alder product eliminates a neutral substance upon further heating....
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