London Dispersion Force in Molecular vs. Ionic Compounds

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SUMMARY

London Dispersion Forces (LDF) are present in both molecular and ionic compounds, contrary to the belief that they exist solely in molecular compounds. LDF arise from temporary shifts in electron density that create dipoles, occurring in all particles, including ions. However, in ionic compounds, the strength of LDF is significantly weaker due to the dominance of full positive and negative charge attractions. In molecular compounds, particularly non-polar ones, LDF serve as the primary intermolecular attractive force.

PREREQUISITES
  • Understanding of intermolecular forces, specifically London Dispersion Forces
  • Knowledge of molecular and ionic compound structures
  • Familiarity with electron density and dipole formation
  • Basic principles of ionic and covalent bonding
NEXT STEPS
  • Research the role of London Dispersion Forces in non-polar molecular compounds
  • Explore the comparison of intermolecular forces in ionic vs. molecular compounds
  • Study the effects of temperature and pressure on London Dispersion Forces
  • Investigate the significance of London Dispersion Forces in real-world applications, such as in liquid gases
USEFUL FOR

Chemistry students, educators, and professionals interested in molecular interactions and the behavior of different types of compounds.

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Homework Statement


Does London Dispersion Force exist only in molecular compounds, or do they also exist in ionic compounds?


Homework Equations


None.


The Attempt at a Solution


I think it exists only in molecular compounds.
 
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London forces exist in all atoms and ions. Think about what London forces are (temporary shifts in electron density that create dipoles) this can occur in all particles. However, in ions it would be the weakest attractive force since there are full positive or full negative charge attractions that would be much stronger than these mini temporary dipoles. LF are relevant in molecular compounds (especially non-polar) because that is the main intermolecular attractive force.
 

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