CHM 501

20. Estimate the order of the boiling points for XeO3, XeOF2, KrF2, and SeF4. Explain your reasoning.

Answer

XeO3: polar, so some dipole-dipole interactions; large volume so strong van der Waal's interactions.

XeOF2: weakly polar, so weak dipole-dipole interactions; large volume so strong van der Waal's interactions.

KrF2: nonpolar, small volume so weak van der Waal's interactions.

SeF4: polar, so some dipole-dipole interactions; moderately small volume so weak to moderate van der Waal's interactions.

prediction for boiling points: KrF2 < SeF4 < XeOF2 < XeO3