Chemistry Objective Exercise, Need Answers Please 16. Which one is resonance for

Question

Chemistry Objective Exercise, Need Answers Please

16. Which one is resonance form of the following free radical? the e. None of the above 17. Is the following structure chiral or achiral? a. Chiral b. Achiral d. Both a and b c. Unknown. e. None of the above 18. Determine whether the carbon atom (as labeled with star has the (R) or (S) configuration. a. GR) d. It is not a stereocenter. b. (S) e. None of the above c. It is not a chirality center 19. Give the relationship between the following two compounds H CH3 a. Enantiomers d. Conformers e. Unrelated. b. Diastereomers. c. Constitutional isomers 20. Which of the following compounds is/ar meso compound(s)? 2) CH OH OH Ho H CH3 e. Both 2 and 3

Explanation / Answer

q16

the double bond will form resonance

so ignore a and b, since those are not affectint the double bond

for d, ignore it, since 2 charges appear

therefore

C is correct, the charge will transfer the doubl ebond to the previous carbons

Q17

can't be chiral, since there ar eno chiral carbons.... therefore achiral

Q18

C2 > C1 > D > H

this appears to be "S"

Q19

These molecules are siastereomers, since they are NOT enantiomers

Please post all other multiple questions in multiple set of Q&A. We are allowed to answer to only one question per set of Q&A.

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