Which conformation is the most stable? A) C B) B C) A 26. How are the molecules

Question

Which conformation is the most stable? A) C B) B C) A 26. How are the molecules below related to each other? A) They are resonance structures. B) They are identical. They are stereoisomers. They are not isomers; they are different compounds. They are constitutional isomers. 27. Give the IUPAC name for the following compound. 2-methyl-4-isopropyloctane 2-methyl-4-isopropylhepatne 3-methyl-5-isopropylhexane 20. A thiol should have properties most similar to: A) an ether. a sulfide. an alkyl halide. an alcohol. an amine.

Explanation / Answer

25.

part c is most stable, because it has steric repulsion between two methyl groups only. Also staggered conformation is more stable than eclipsed conformation.

26.

A) they are resonance structures

27.

B) 2-methyl-4-isopropylheptane

28.

D) an alcohol

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