Practice Exercise 4

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Chapter 6: Isomers and Stereochemistry

Exercises

Practice Exercise 4

This activity contains 6 questions.

How many stereoisomers does 1-bromo-2-heptene have?

2 (a pair of enantiomers)3 (one pair of enantiomers and a meso compound)1 stereoisomer2 (a pair of configurational isomers)5 (two pairs of enantiomers and a meso compound)

How many chirality centers are there in tartaric acid and how many different stereoisomers exist for this compound?

1 chirality center; 1 stereoisomer2 chirality centers; 2 stereoisomers2 chirality centers; 3 stereoisomers2 chirality centers; 1 stereoisomer2 chirality centers; 4 stereoisomers

Which of the following compounds is chiral?

trans-1,3-dichlorocyclobutanecis-1,2-dichlorocyclopentanecis-1-4-dichlorocyclohexanetrans-1,2-dichlorocyclopentanetrans-1,4-dichlorocyclohexane

Compound A has an optical rotation of 10 degrees when measured in a cell that is 5 cm long and with [A] = 1 g/ml. What is the specific rotation of compound A?

2010521

Which of the following compounds is a trans-disubstituted cyclohexane?

1,3-disubstituted: both equatorial1,3-disubstituted: one axial, one equatorial1,4-disubstituted: one axial, one equatorial1,2-disubstituted: one axial, one equatorial1,3-disubstituted: both axial

Which statement about trans-1,4-dimethylcyclohexane is correct?

One methyl group is equatorial and the other is axial.The most stable conformation is the twist-boat.Both methyl groups are equatorial.It has an enantiomer.It is chiral.

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