Consider the following scheme: Br CH3 H3C-CH CH-CH2-CH-CH CH3 H-CEC-H B (Acetylene) Diels-Alder RCO3H exce ss Product 1 eq KMNO4 H20 cold Product What is the structure of compound D? a. 3-isobutyl-6-methylcyclohexene b. 3-isopropyl-6-methyl-1,4-cyclohexadiene c. 3-isopropyl-6-methylcyclohexene d. None of the answers

Consider the following scheme: Br CH3 H3C-CH CH-CH2-CH-CH CH3 H-CEC-H B (Acetylene) Diels-Alder RCO3H exce ss Product 1 eq KMNO4 H20 cold Product What is the structure of compound D? a. 3-isobutyl-6-methylcyclohexene b. 3-isopropyl-6-methyl-1,4-cyclohexadiene c. 3-isopropyl-6-methylcyclohexene d. None of the answers

Organic Chemistry: A Guided Inquiry

2nd Edition

ISBN:9780618974122

Author:Andrei Straumanis

Publisher:Andrei Straumanis

Chapter4: Polar Bonds, Polar Reactions

Section: Chapter Questions

Problem 30CTQ: According to the conventions above, what is the sign ( + or ) of the P.E. change (H) for Rxn 3?

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Diels–Alder reaction of a monosubstituted diene (such as CH2=CH–CH=CHOCH3) with a monosubstituted dienophile (such as CH2=CHCHO)gives a mixture of products, but the 1,2-disubstituted product oftenpredominates. Draw the resonance hybrid for each reactant, and use thecharge distribution of the hybrids to explain why the 1,2-disubstitutedproduct is the major product.
(I) Give major products for 1,2-/1,4 additions (A) Diels-Alder (B-D) cycloadditions, [2+2] cycloaddition, and Retro-Dial-Alder (E) cycloaddition. Illustrate the regiochemistry and stereochemistry (meal, enantiomer, exo or Endo) for cycloaddition B-D.
1. Consider the following eqm: SO2(g) + NO2(g) ⇌ NO(g) + SO3(g)What effect will adding SO3 have on the rxn?What effect will removing NO2 have on the rxn? 2. Consider the following exothermic rxn at eqm: C3H8(g) + 5O2(g) ⇌ 4H2O(l) + 3CO2(g)What effect will increasing the temperature have on the rxn?What effect will increasing the pressure have on the rxn?
Give major products for 1,2-/1,4-additions (A) Diels-Alder (B-D) cycloadditions [2+2] cycloadditions , and Retro-Diels-Alder (E) cycloaddition. Illustrate the regiochemistry and stereochemistry (me so, enatiomer., exo or Endo) for cycloadditions B-D?
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Tips on how to approach a Diels Alder problem like this.
Diels–Alder reaction of a monosubstituted diene (such as CH2=CH– CH=CHOCH3) with a monosubstituted dienophile (such as CH2=CHCHO) gives a mixture of products, but the 1,2-disubstituted product often predominates. Draw the resonance hybrid for each reactant, and use the charge distribution of the hybrids to explain why the 1,2-disubstituted product is the major product.
1. Write the a) Lewis dot formula, b) line angle formula and of the following molecules: A. HCN B. NH3 2. What is the difference between homolysis vs. heterolysis. Show by giving an example.