What is the IUPAC name of the following compound?
E)-2-Bromo-3,4-dimethyl-2-pentene
Z)-1-Bromo-1,2,3-trimethyl-1-butene
Z)-2-Bromo-3,4-dimethyl-2-pentene
E)-1-Bromo-1,2,3-trimethyl-1-butene

Question

What is the IUPAC name of the following compound? 
E)-2-Bromo-3,4-dimethyl-2-pentene 
Z)-1-Bromo-1,2,3-trimethyl-1-butene 
Z)-2-Bromo-3,4-dimethyl-2-pentene 
E)-1-Bromo-1,2,3-trimethyl-1-butene

Quizplus · Accepted Answer

The longest carbon chain is 5 carbons and there is a bromo substituent on the second carbon. The double bond is between the second and third carbons, with methyl groups on carbons 3 and 4. The double bond has a higher priority than the bromo substituent, so we must determine whether it is E or Z. To do this, we look at the groups attached to each carbon of the double bond. On the left side of the double bond, we have a methyl group and a hydrogen. On the right side, we have a methyl group and a bromine. Since bromine has a higher atomic number than carbon, it has a higher priority. Therefore, the molecule is Z-configured. The complete name is (Z)-2-Bromo-3,4-dimethyl-2-pentene.

What Is the IUPAC Name of the Following Compound