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Related Concept Videos

Intermolecular Forces03:13

Intermolecular Forces

Atoms and molecules interact through bonds (or forces): intramolecular and intermolecular. The forces are electrostatic as they arise from interactions (attractive or repulsive) between charged species (permanent, partial, or temporary charges) and exist with varying strengths between ions, polar, nonpolar, and neutral molecules. The different types of intermolecular forces are ion–dipole, dipole–dipole, hydrogen bonds, and dispersion; among these, dipole–dipole, hydrogen bonds, and dispersion...
Intermolecular Forces03:13

Intermolecular Forces

Atoms and molecules interact through bonds (or forces): intramolecular and intermolecular. The forces are electrostatic as they arise from interactions (attractive or repulsive) between charged species (permanent, partial, or temporary charges) and exist with varying strengths between ions, polar, nonpolar, and neutral molecules. The different types of intermolecular forces are ion–dipole, dipole–dipole, hydrogen bonds, and dispersion; among these, dipole–dipole, hydrogen bonds, and dispersion...
Van der Waals Interactions01:24

Van der Waals Interactions

Atoms and molecules interact with each other through intermolecular forces. These electrostatic forces arise from attractive or repulsive interactions between particles with permanent, partial, or temporary charges. The intermolecular forces between neutral atoms and molecules are ion–dipole, dipole–dipole, and dispersion forces, collectively known as van der Waals forces.Polar molecules have a partial positive charge on one end and a partial negative charge on the other end of the molecule,...
Intermolecular vs Intramolecular Forces03:00

Intermolecular vs Intramolecular Forces

Intermolecular forces (IMF) are electrostatic attractions arising from charge-charge interactions between molecules. The strength of the intermolecular force is influenced by the distance of separation between molecules. The forces significantly affect the interactions in solids and liquids, where the molecules are close together. In gases, IMFs become important only under high-pressure conditions (due to the proximity of gas molecules). Intermolecular forces dictate the physical properties of...
Intermolecular Forces and Physical Properties02:56

Intermolecular Forces and Physical Properties

Intermolecular Forces in Solutions02:28

Intermolecular Forces in Solutions

The formation of a solution is an example of a spontaneous process, a process that occurs under specified conditions without energy from some external source.
When the strengths of the intermolecular forces of attraction between solute and solvent species in a solution are no different than those present in the separated components, the solution is formed with no accompanying energy change. Such a solution is called an ideal solution. A mixture of ideal gases (or gases such as helium and argon,...

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Probing the Structure and Dynamics of Interfacial Water with Scanning Tunneling Microscopy and Spectroscopy
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Probing the Structure and Dynamics of Interfacial Water with Scanning Tunneling Microscopy and Spectroscopy

Published on: May 27, 2018

Intermolecular interaction in water hexamer.

Yiming Chen1, Hui Li

  • 1Department of Chemistry, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, USA.

The Journal of Physical Chemistry. A
|October 12, 2010
PubMed
Summary
This summary is machine-generated.

The study reveals that polarization interactions significantly influence water hexamer stability, unlike electrostatic and exchange forces. Many-body effects, particularly in polarization, are crucial for understanding these molecular structures.

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Area of Science:

  • Computational chemistry
  • Physical chemistry
  • Molecular modeling

Background:

  • Water hexamers exhibit diverse low-lying structures.
  • Understanding intermolecular interactions is key to their stability.

Purpose of the Study:

  • To investigate the origin of intermolecular interactions in water hexamers.
  • To quantify many-body effects in various water hexamer structures.

Main Methods:

  • Localized Molecular Orbital Energy Decomposition Analysis (LMO-EDA).
  • Second-order Møller-Plesset perturbation (MP2) theory.
  • Large basis set calculations.

Main Results:

  • Electrostatic and exchange interactions are pairwise additive.
  • Dispersion and repulsion interactions are nearly pairwise additive.
  • Polarization interactions show significant many-body effects, ranging from -13.10 to -8.85 kcal/mol.

Conclusions:

  • Relative stabilities of water hexamers depend on the balance of interaction types.
  • Polarization is the dominant contributor to many-body effects in water hexamers.