Learn about Cahn Ingold Prelog priority. Understand Cahn Ingold Prelog rules in chemistry, and examples of using the rules to a stereocenter in a molecule. Related to this Question What is the definition of a chiral center? Describe how chiral centers are shown using Fischer projection. ...
same deal.. the left C in C=C has H and CH2-R groups attached... the C in CH2-R has higher atomic mass than the H so that gets the priority. The right C in C=C is bonded to CH2-R' and an H. the CH2-R' gets the priority and we have this setup priority ↓ H CH2 - ...
Let’s go through the next two examples, a little more quickly. Assigning priorities to each of the two chiral centers in questions 2 and 3, we get2S, 3Rfor question #2 and2S, 3Sfor question #3. How did we get these priorities? SeeNote 1for a walkthrough of Question #...
You should never compare any atom of the second layer to a first layer atom regardless of its atomic number. For example, in the following molecule, layer 1 is a tie so we proceed to layer 2 which gives the priority to the carbon connected to the chiral center on the left since it ha...