Given the wedge-and-dash structure of $2_{}$-bromobutanol with the following configuration: the hydroxyl group ($\mathrm{OH}$) is on a wedge at carbon 2, the bromine ($\mathrm{Br}$) is on a dash at carbon 2, and the methyl group ($\mathrm{CH}{3}_{}$) and hydrogen are in the plane, which Fischer projection correctly represents this molecule?

Give the stereochemical relationships between each pair of structures. Examples are same compound, structural isomers, enantiomers, and diastereomers. Which pairs could you (theoretically) separate by distillation or recrystallization?

(a)

(b)

Are the following pairs identical, enantiomers, diastereomers, or constitutional isomers?

c.

d.

For each pair, give the relationship between the two compounds. Making models will be helpful.

(g)

Which of the following is a correct Fischer projection for $D_{-}\mathrm{glucose}$?

Which Fischer projection represents $D$-glucose?

Which of the following is the correct Fischer projection for $D_{-}\mathrm{glucose}$?

Given the following compound: ${\mathrm{CH}}_3-\mathrm{CH}\left(\mathrm{OH}\right)-\mathrm{CH}\left(\mathrm{Cl}\right)-\mathrm{COOH}$, which of the following Fischer projections correctly represents this molecule?

Which of the following choices represents the Fischer projection of $2_{-}\mathrm{butanol}$?