Why is the boiling point of carbon tetrachloride greater than silicontetrachloride?

Answer 1

tetrahedral molecules will have a better packing if the central atom is smaller than the peripheral ones. hence carbon tetrachloride has better packing and hence a higher boiling point.

(this is most probably wrong, but seemed like a only explanation i could think of)

Answer 2

The boiling point of a compound is influenced by its molecular weight and intermolecular forces. Carbon tetrachloride (CCl4) has a higher boiling point than silicon tetrachloride (SiCl4) because carbon is more electronegative than silicon, leading to stronger dipole-dipole interactions in CCl4 compared to SiCl4, which only has weaker van der Waals forces between molecules.