(R)-2-Fluorobutane

Use your mouse to orient the molecule in such a way that you look down on the C2-H bond. Can you see that the substituents F (priority 1), ethyl (priority 2) and methyl (priority 3) are arranged in a clockwise fashion? As to conformation, note that all bonds are staggered.


Figure. The RHF/6-31G* optimized structure of (R)-2-fluorobutane.