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Related Concept Videos

Intermolecular Forces03:13

Intermolecular Forces

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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...
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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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Comparing Intermolecular Forces: Melting Point, Boiling Point, and Miscibility02:34

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Intermolecular forces are attractive forces that exist between molecules. They dictate several bulk properties, such as melting points, boiling points, and solubilities (miscibilities) of substances. Molar mass, molecular shape, and polarity affect the strength of different intermolecular forces, which influence the magnitude of physical properties across a family of molecules.
Temporary attractive forces like dispersion are present in all molecules, whether they are polar or nonpolar. They...
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Molecular and Ionic Solids02:54

Molecular and Ionic Solids

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Crystalline solids are divided into four types: molecular, ionic, metallic, and covalent network based on the type of constituent units and their interparticle interactions.
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
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Intermolecular vs Intramolecular Forces03:00

Intermolecular vs Intramolecular Forces

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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...
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Solubility of Ionic Compounds02:55

Solubility of Ionic Compounds

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Solubility is the measure of the maximum amount of solute that can be dissolved in a given quantity of solvent at a given temperature and pressure. Solubility is usually measured in molarity (M) or moles per liter (mol/L). A compound is termed soluble if it dissolves in water.
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From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
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Identifying intermolecular multiple-quantum coherences in ionic liquids.

Yanan Li1, Florin Teleanu2, Alexej Jerschow1

  • 1Department of Chemistry, New York University, 100 Washington Square East, New York, 10003, NY, United States.

Journal of Magnetic Resonance (San Diego, Calif. : 1997)
|October 15, 2025
PubMed
Summary
This summary is machine-generated.

Intermolecular multiple quantum coherences (iMQCs) were identified in ionic liquids for 1H, 19F, and 11B nuclei. However, intramolecular triple quantum coherences (TQCs) were not detected in this study.

Keywords:
BoronIntermolecular multiple-quantum coherenceIonic liquidsMultiple-quantum coherencePulsed field gradient

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Area of Science:

  • Nuclear Magnetic Resonance Spectroscopy
  • Physical Chemistry
  • Materials Science

Background:

  • Ionic liquids, such as 1-butyl-3-methylimidazolium tetrafluoroborate ([bmim][BF4]), are isotropic systems often exhibiting high spin concentrations.
  • High spin concentrations can facilitate the emergence of intermolecular multiple quantum coherences (iMQCs).

Purpose of the Study:

  • To investigate the presence and characteristics of intermolecular multiple quantum coherences (iMQCs) in the 1H, 19F, and 11B nuclei of [bmim][BF4].
  • To explore the potential excitation of intramolecular triple quantum coherences (TQCs) in the 11B quadrupolar nuclei due to slow tumbling in ionic liquids.

Main Methods:

  • Nuclear Magnetic Resonance (NMR) spectroscopy was employed to study the 1H, 19F, and 11B nuclei within the ionic liquid [bmim][BF4].
  • Experiments were designed to detect both homonuclear iMQCs and intramolecular TQCs.

Main Results:

  • Homonuclear intermolecular multiple quantum coherences (iMQCs) were successfully identified for 1H, 19F, and 11B nuclei.
  • While iMQCs were observable for 11B, intramolecular triple quantum coherences (TQCs) were not detected, even considering the slow tumbling dynamics characteristic of ionic liquids.

Conclusions:

  • The study confirms the occurrence of iMQCs in ionic liquids across different nuclei.
  • The absence of detectable intramolecular TQCs provides insights into the specific dynamic processes and interactions within ionic liquids.