(A) enantiomers.
(B) diastereomers.
(C) constitutional isomers.
(D) conformational isomers.
11 . (R)-2-chloro-(S)-3-bromobutane and (S)-2-chloro-(S)-3-bromobutane are:(A) enantiomers.
(B) diastereomers.
(C) meso compounds.
(D) the same molecule.
12 . A scientist takes a 0.5 solution of an unknown pure dextrorotatory organic molecule
and places it in a test tube with a diameter of 1 cm. He observes that a plane of polarized
light is rotated 12° under these conditions. What is the specific rotation of this molecule?(A) –240°
(B) –24°
(C) +24°
(D) +240°
13 . Omeprazole is a proton pump inhibitor commonly used in gastroesophageal reflux
disease. When omeprazole, a racemic mixture, went off-patent, pharmaceutical
companies began to manufacture esomeprazole, the (S)-enantiomer of omeprazole, by
itself. Given 1 M solutions of omeprazole and esomeprazole, which solution(s) would likely
exhibit optical activity?(A) Omeprazole only
(B) Esomeprazole only
(C) Both omeprazole and esomeprazole
(D) Neither omeprazole nor esomeprazole