FIGURE 2 The Diels-Alder reaction between 1,3-butadiene and maleic anhydride to

Question

FIGURE 2 The Diels-Alder reaction between 1,3-butadiene and maleic anhydride to produce 4 cyclobexene-cis-1.2-dicarbox ylic anhydride. 10. Xylenes were chosen for the solvent for this reaction because: a) xylenes are aprotic and stabilize the intermediate carbanion b) xylenes are nonpolar and hydragen bonding can e readily C) the boiling point of xylene is near an ideal reaction temperatured) the xylenes are nonflammable 11. As pictured above (Figure 2), the Diel Alder cycloaddition reaction mechanism is: a) polar; b) radical; c) a mixture of polar and radical; d) neither polar nor radical, since the intermediate geometry prevents both

Explanation / Answer

Diels Alder reaction neither follows a polar nor a radical pathway but concerted mechanism which means that the bonds are broken and bonds are made simultaneously. Therefore the correct option is (d)

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