Chapter 4.7, Problem 11P

Using the Fischer projection of $\left(\text{R}\right)\text{-2-butanol}$ shown, explain how each of the following affectsthe configuration of the chirality center.

Switching the positions of $\text{H}$ and $\text{OH}$.

Switching the positions of ${\text{CH}}_3$ and ${\text{CH}}_2{\text{CH}}_3\text{.}$

Switching the positions of three groups.

Switching $\text{H}$ with $\text{OH}$, and ${\text{CH}}_3$ with ${\text{CH}}_2{\text{CH}}_3\text{.}$

Rotating the Fischer projection $180°$ around an axis perpendicular to the page.