The two molecules shown below have different arrangements of atoms but the same chemical formula. Which molecule has a larger dipole moment?

• A. cis-2,3-dibromobut-1-ene has a larger dipole moment.
• B. trans-2,3-dibromobut-1-ene has a larger dipole moment.
• C. cis-2,3-dibromobut-1-ene and trans-2,3-dibromobut-1-ene have equal dipole moments.
• D. cis-2,3-dibromobut-1-ene and trans-2,3-dibromobut-1-ene do not have dipole moments.

Answer: (A)