19. When 1,3-butadiene reacts with CH2=CHCN, which of the terms below best describes the product mixture?(A) a mixture of two diastereomers(C) a racemic mixture(E) a mixture of bicyclic compounds(B) a single compound(D) optically active

7. Predict the specific rotation of the compound shown.(A) It is impossible to predict; it must be determined experimentally.(B) Because both asymmetric centers are R, the compound is dextrorotatory.(C) Because both asymmetric centers are S, the compound is dextrorotatory.(D) Zero; the compound is achiral.(E) Because this compound represents a racemic mixture, the compound is dextrorotatory.

19. When 1,3-butadiene reacts with CH₂=CHCN, which of the terms below best describes the product mixture?
(A) a mixture of two diastereomers
(C) a racemic mixture

(E) a mixture of bicyclic compounds
(B) a single compound
(D) optically active

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