Multiple choice, 1 point. Which of these compounds can exist as a meso compound?
ID: 836462 • Letter: M
Question
Multiple choice, 1 point. Which of these compounds can exist as a meso compound? 1,2-pentanediol 2,3-pentanediol 2,4-pentanediol cis-1,4-cyclohexanediol 2-PentanoI has a stereocenter. You have a pure sample of 2-pentanol but discover that it does not rotate plane polarized light, though the polarimeter is working perfectly and there is no operator error. What is the most likely explanation? Name these compounds. [Note: a phenyl substituent The symbol i is used to indicate the hatched wedge? Multiple choice, Which of the following compounds is in the S configuration? Multiple choice, Choose the enantiomer of the compound on the left below. Draw the following compounds. Draw the following compounds. trans-1-phenyl-1-pentene (3E,5Z)-3-chloro-5,6-dimethyl-3,5-heptadieneExplanation / Answer
1. Meso compound is optically inactive. Upper half is same as lower half. In 2,4 pentandiol you have OH present on 2 and 4 carbons which makes them same from both sides. CH3CH(OH)CH2CH(OH)CH3.
Option (C).
2.Basically 2 pentanol has two enantiomers. The specific optical rotation of these two enantiomers is equal but with opposite signs. So the net optical rotation is sum of these two which makes it zero.
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