Science & Mathematics » Chemistry » Which is higher in stereochemical priority?

Which is higher in stereochemical priority?

If a CH2CH3 is a substituent and CH3 is a substituent, which is higher in priority?

Also, It would help if someone could explain why when naming some alkene compounds, the E-Z system must be implemented, while in some it is not required. Is this because two of the substituents are the same on a single carbon?

1 Answers1