Which of the following statements best explains the general thermodynamic trend in boiling points be β Isomerism and Stereochemistry Chemistry Question
Question
Which of the following statements best explains the general thermodynamic trend in boiling points between standard cis and trans geometrical isomers?
Answer: A
π‘ Solution & Explanation
Boiling point is heavily dependent on intermolecular forces of attraction in the liquid phase. The cis isomer typically has a net resultant dipole moment ($\mu eq 0$), making it more polar. This distinct polarity leads to stronger intermolecular dipole-dipole attractions, meaning a larger amount of heat energy is required to boil the substance compared to the non-polar trans isomer ($\mu \approx 0$).
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