The heat of hydrogenation of 2,3-pentadiene, a cumulated diene, is 70.5 kcal/mol. What are the relativestabilities of cumulated, conjugated, and isolated dienes?
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The heat of hydrogenation of 2,3-pentadiene, a cumulated diene, is 70.5 kcal/mol. What are the relative
stabilities of cumulated, conjugated, and isolated dienes?
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- The compound below is treated with chlorine in the presence of light. CH3 CH3CHCH,CH3 Draw the structure for the organic radical species produced by reaction of the compound with a chlorine atom. Assume reaction occurs at the weakest C-H bond. • You do not have to consider stereochemistry. You do not have to explicitly draw H atoms.Born-Haber cycle; I don’t know how to formulate it for this reaction.The compound below is treated with chlorine in the presence of light. CH3 CH3 CH3 Draw the structure for the organic radical species produced by reaction of the compound with a chlorine atom. Assume reaction occurs at the weakest C-H bond. • You do not have to consider stereochemistry. • You do not have to explicitly draw H atoms. Sn [F ?
- Chlordane, like DDT, is an alkyl halide that was used as an insecticide for crops such as corn and citrus and for lawns. In 1983, it was banned for all uses except against termites, and in 1988, it was banned for use against termites as well. Chlordane can be synthesized from two reactants in one step. One of the reactants is hexachlorocyclopentadiene. What is the other reactant?IIIC) trans-cyclooctene can be synthesized from cis-cyclooctene with UV light (hv). Use orbital line diagram to show electronic excitation and arrow-pushing to show how this reaction can occur photochemically. hyThe G° for conversion of “axial” fluorocyclohexane to “equatorial” fluorocyclohexane at 25 °C is -0.25 kcal>mol. Calculate the percentage of fluorocyclohexane molecules that have the fluoro substituent in an equatorial position at equilibrium.
- 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.The compound below is treated with chlorine in the presence of light. CH3 CH,CHCH3 Draw the structure for the organic radical species produced by reaction of the compound with a chlorine atom. Assume reaction occurs at the weakest C-H bond. • You do not have to consider stereochemistry. • You do not have to explicitly draw H atoms.IIIC) trans-cyclooctene can be synthesized from cis-cyclooctene with UV light (hv).I Use orbital line diagram to show electronic excitation and arrow-pushing to show how this reaction can occur photochemically. hy
- Why does the first reaction, but not the second, give ring expansion?Draw the structure of the organic product of the reaction between cyclohexene and OsO4, H₂O2. • Use the wedge/hash bond tools to indicate stereochemistry where it exists. Separate multiple products using the + sign from the drop-down menu. • In cases where there is more than one answer, just draw one. ● MATIL ? Ⓡ ChemDoodle Sn [FTrue 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.