CHEM 211 Lecture Notes - Lecture 17: Polarimeter, Optical Rotation, Enantiomer

• School: SUNY Geneseo
• Department: Chemistry
• Course: CHEM 211
• Professor: charlebois Amber

Document Summary

Can have either counterclockwise movement (s) or clockwise movement (r: s = sinister (left in latin), r = right in latin, assign priorities take a step out put the lowest priority directed away from you. Highest to lowest priority: in the event of a tie (two molecules have the same atomic number) Then look at the atoms attached to it: which one has atoms attached to it that has a higher atomic number than the other one, in the event there is no h to assign to the back. Assign the group/atom that has the lowest priority to the back: after you gure out if the molecule is r or s, the naming is simple. Put the r or s before the name: when the h is not in the back, rotate the molecule using your spacial thinking. For groups containing double or triple bonds: triple bond has higher priority in the case of a tie.