Which mechanism causes increased boiling point in complex organic molecules compared to simpler molecules?

💡 Explanation

In complex organic molecules, the increase in surface area allows for larger transient dipoles to exist, which enhances the London dispersion forces between molecules because of increased instantaneous polarization, leading to a higher required energy for vaporization. Therefore increased London dispersion forces result in a higher boiling point, rather than kinetic energy reduction, scattering changes, or dipole-dipole repulsion which are unrelated.

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