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- Consider the four trienes E–H.a.Rank compounds E–H in order of increasing heat of hydrogenation. b.Which compound is most reactive in the Diels–Alder reaction? c. Which compound(s) are unreactive in the Diels–Alder reaction? d.Which compound absorbs the longest wavelength of ultraviolet light?3. Predict the major product(s) for the following reaction. HCI o°c 4. Predict the product for the following Diels-Alder reaction. 5. Predict the product for the following Diels-Alder reaction. ÇOCH, ATell whether each stereogenic isomer is either R or S. Assign the correct priority of each group comnected to the stereogenic cemter. a. b. c,H d. NH2 .S. OCH, "Br HO HS CH
- Classify each pericyclic reaction as an electrocyclic reaction, cycloaddition, or sigmatropic rearrangement. Indicate whether the stereochemistry is conrotatory, disrotatory, suprafacial, or antarafacial.Draw the products of each reaction. KMNO4 Br2 FeBra a. CH3 -C(CH3)3 d. Br2 NH,NH2 b. hv "OH NO2 CH3 Zn(Hg), HCI f. ON- CH,NH2 C. -CI CH2CH2CH3 NO2Devise a stepwise synthesis of each compound from dicyclopentadiene using a Diels–Alder reaction as one step. You may also use organic compounds having ≤ 4 C's, and any required organic or inorganic reagents.
- Which set of reagents is used for the Markovnikov addition of water to an alkene without rearrangement? A. BH3, THF followed by H₂O2, NaOH B. H₂O, H₂SO4 C. Hg(O₂CCH3)2, H₂O followed by NaBH4, NaOH D. none of theseDraw the products formed when (CH3)2C=CH2 is treated with each reagent. a.HBr b. H2O, H2SO4 c. CH3CH2OH, H2SO4 d. Cl2 e.Br2, H2O f.NBS (aqueous DMSO) g.[1] BH3; [2] H2O2, HO−Draw all resonance structures for the carbocation formed by ortho attack of the electrophile +NO2 on each starting material. Label any resonance structures that are especially stable or unstable.