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 continuous chain of carbons in the compound is 5, and its double bond starts at the second carbon with respect to the bromine. The two branches are both methyl groups, and they are located at the third and fourth carbons. The stereochemistry around the double bond is Z, meaning that the higher priority substituents (bromine and the methyl group) are on the same side of the double bond. Therefore, the correct IUPAC name is (Z)-2-bromo-3,4-dimethyl-2-pentene.

What Is the IUPAC Name of the Following Compound