5. When the diene below is dissolved in THF solvent to which a small amount of H₂SO4 has been added, cyclic products are formed that are isomeric with the reactant. Write a mechanism for the formation of ONE of these cyclic isomers, and include its structure. (In other words, you predict the product structure by going through the mechanism.) Include curved arrows in the mechanism to show bonding changes. yand H₂SO4 THF A cyclic isomer of the reactant

5. When the diene below is dissolved in THF solvent to which a small amount of H₂SO4 has been added, cyclic products are formed that are isomeric with the reactant. Write a mechanism for the formation of ONE of these cyclic isomers, and include its structure. (In other words, you predict the product structure by going through the mechanism.) Include curved arrows in the mechanism to show bonding changes. yand H₂SO4 THF A cyclic isomer of the reactant

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Predict the product of the following Diels-Alder reactions, using the correct stereo- and regiochemistry. Make sure you include a detailed explanation of your answer, and provide arrows for mechanisms of needed.
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True or False: Acetylene is a naturally occurring conjugated diene True or False: The Diels-Alder reaction has the stereochemistry of the dienophile is retained in the product. True or False: When looking at kinetic vs. thermodynamic products the kinetic product predominates at low temperature. True or False: the mechanism of the Diels-Alder reaction is three π bonds break; one σ bond and two π bonds form.
-A on 2. Which class of pericyclic reactions is the Diels-Alder reaction? What is a (4+ 2) n cycloaddition reaction? Explain •a cycloaddikon where ore reactant moleculee cortriautes 41 ele ctrons & the other a electrans 3. 4. (a) Give the systematic name of the diene in this reaction 15-cis)1,4-diphenyl-1,3-betadiene (b) Calculate the difference in the standard Yree energy, AG° (kJ/mol) between the two major conformations of this diene? (Write the formula and show your work.) = (-617.920458au- AGO Product- reactants k017.9259320 = 0.00S 47444K/ml.005474qu 14.37 KJ/ mol 1au= alas.KLcis) (trans) 5. Give the systematic name of the dienophile in this reaction. Maleie nhydride 6. Give the systematic name of the adduct in this reaction. 7. What is the melting point of your synthesized Diels-Alder adduct 8. Calculate the standard free energy of activation AG # for this reaction (Write the formula and show your work). AG = G75- G°R = (-994.1304ay au)-(-997.194182 au) - 0.039898au= .639898ay•…
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Choose the structure that fits the descriptions below from the pool of choices. Use the dropdown list to select your answe swers. Pool of Choices CAT MAT RAT VAT PAT НАT A conjugated diene Choose. An isolated diene Choose. an alkene with possible rearrangement product (1,2-H shift) with reaction to HI Choose. + a diene capable of having 1,2 and 1,4-addition products Choose.
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When non-symmetrical dienes react with non-symmetrical dienophiles, there are two possible regioisomers to be formed as products. With this theoretical concept, predict the two possible products for the following Diels-Alder reaction. State which product is the major one and which is the minor one. OCH, OCH, ? + ? +
8) Draw the product of the Sn2 reaction illustrated below. Comment on the stereochemistry of the product: NaSH Sn2 Br ÓCH3 .
3. What is the difference between the reaction conditions to obtain kinetic and thermodynamic products in the reactions of dienes?
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