24. Reduction of a 2-ketohexose with NaBH4 yields:(A) a single aldohexose (B) a mixture of acetals (C) a mixture of alditols(D) a mixture of pyranoses (E) a mixture of cyclic hemiacetals

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.

24. Reduction of a 2-ketohexose with NaBH4 yields:
(A) a single aldohexose
(B) a mixture of acetals
(C) a mixture of alditols
(D) a mixture of pyranoses
(E) a mixture of cyclic hemiacetals

相關試題

相關試卷