1.Which of these dienes is the most reactive in the Diels-Alder reaction? (A) 1,3-Butadiene (B) 1,4-Pentadiene (C) 2,3,-Dimethyl-1,3-butadiene (D) 1,2-Butadiene (E) 1,4-Cyclohexadiene

1.Which of these dienes is the most reactive in the Diels-Alder reaction?
(A) 1,3-Butadiene
(B) 1,4-Pentadiene
(C) 2,3,-Dimethyl-1,3-butadiene
(D) 1,2-Butadiene
(E) 1,4-Cyclohexadiene

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統計： A(1), B(0), C(0), D(0), E(0) #3224455

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B1 · 2025/10/26

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1. 題目解析 Diels-Alder反...

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11. At some temperatures, the relative reactivities of 3°, 2° and 1°alkane hydrogens in free radical chlorination are in the ratio of 5:3:1. What would be the expected percentages of monochlorination of isopentane produced? (i) 2-chloro-2-methylbutane, (ii) combined 1-chloro-2- methylbutane and 1-chloro-3-methylbutane, and (iii) 2-chloro-3-methylbutane. (A) 10% (i), 75% (ii), 15% (iii) (B)25% (i),45% (ii),30% (iii) (C) 29% (i), 44% (ii),18% (iii) (D)30% (i),35%(ii),35% (iii) (E) 36% (i), 43% (ii), 21% (iii)

1.Which of these dienes is the most reactive in the Diels-Alder reaction?
(A) 1,3-Butadiene
(B) 1,4-Pentadiene
(C) 2,3,-Dimethyl-1,3-butadiene
(D) 1,2-Butadiene
(E) 1,4-Cyclohexadiene

詳解 (共 1 筆)

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