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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...
Hydrogen Bonds01:04

Hydrogen Bonds

A hydrogen bond is formed when a weakly positive hydrogen atom already bonded to one electronegative atom (for example, the oxygen in the water molecule) is attracted to another electronegative atom from another polar molecule, such as water (H2O), hydrogen fluoride (HF), or ammonia (NH3). The huge electronegativity difference between the H atom (2.1) and the atom to which it is bonded (4.0 for an F atom, 3.5 for an O atom, or 3.0 for an N atom), combined with the very small size of an H atom...
Hydrogen Bonds00:26

Hydrogen Bonds

Hydrogen BondsHydrogen bonds are weak attractions between atoms that have formed other chemical bonds. One of these atoms is electronegative, like oxygen, and has a partial negative charge. The other is a hydrogen atom that has bonded with another electronegative atom and has a partial positive charge.Hydrogen Bonds Control the World!Because hydrogen has very weak electronegativity when it binds with a strongly electronegative atom, such as oxygen or nitrogen, electrons in the bond are...
Comparing Intermolecular Forces: Melting Point, Boiling Point, and Miscibility02:34

Comparing Intermolecular Forces: Melting Point, Boiling Point, and Miscibility

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...
Alkyl Halides02:45

Alkyl Halides

Structural Properties
Alkyl halides are halogen-substituted alkanes wherein one or more hydrogen atoms of an alkane is replaced by a halogen atom such as fluorine, chlorine, bromine, or iodine. The carbon atom in an alkyl halide is bonded to the halogen atom, which is sp3-hybridized and exhibits a tetrahedral shape.
Unlike alkyl halides, compounds in which a halogen atom is bonded to an sp2 -hybridized carbon atom of a carbon-carbon double bond (C=C) are called vinyl halides. Whereas aryl...

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Related Experiment Video

Updated: Jun 19, 2026

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
06:44

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding

Published on: March 24, 2018

Unexpected hydrogen bond dynamics in imidazolium-based ionic liquids.

Jens Thar, Martin Brehm, Ari P Seitsonen

    The Journal of Physical Chemistry. B
    |October 27, 2009
    PubMed
    Summary

    This study reveals complex hydrogen bonding dynamics in ionic liquids. While structural analysis highlights the H2 site, dynamical simulations show faster decay at H2 compared to H4 and H5.

    More Related Videos

    Vibrational Spectra of a N719-Chromophore/Titania Interface from Empirical-Potential Molecular-Dynamics Simulation, Solvated by a Room Temperature Ionic Liquid
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    Vibrational Spectra of a N719-Chromophore/Titania Interface from Empirical-Potential Molecular-Dynamics Simulation, Solvated by a Room Temperature Ionic Liquid

    Published on: January 25, 2020

    Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
    11:04

    Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature

    Published on: December 20, 2016

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    Last Updated: Jun 19, 2026

    From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
    06:44

    From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding

    Published on: March 24, 2018

    Vibrational Spectra of a N719-Chromophore/Titania Interface from Empirical-Potential Molecular-Dynamics Simulation, Solvated by a Room Temperature Ionic Liquid
    08:54

    Vibrational Spectra of a N719-Chromophore/Titania Interface from Empirical-Potential Molecular-Dynamics Simulation, Solvated by a Room Temperature Ionic Liquid

    Published on: January 25, 2020

    Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
    11:04

    Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature

    Published on: December 20, 2016

    Area of Science:

    • Physical Chemistry
    • Computational Chemistry
    • Materials Science

    Background:

    • Ionic liquids (ILs) are salts that are liquid at room temperature, with tunable properties.
    • Understanding hydrogen bonding in ILs is crucial for predicting their behavior and applications.
    • First-principles molecular dynamics (FMD) offers atomistic insights into IL structure and dynamics.

    Discussion:

    • FMD simulations reveal distinct structural and dynamical roles of hydrogen bond sites in [C(2)C(1)im][SCN].
    • The most acidic hydrogen (H2) plays a superior structural role but exhibits faster dynamical decay.
    • Neglecting hydrogen bond directionality aligns dynamics with geometric findings, suggesting simplified models may capture essential features.

    Key Insights:

    • The H2 site is structurally significant for hydrogen bonding in [C(2)C(1)im][SCN].
    • Despite structural importance, H2 hydrogen bond dynamics are faster than those at H4 and H5.
    • Two primary anion motions were identified: rapid hopping (<0.3 ps) and slower translational motion (5-10 ps).

    Outlook:

    • Further FMD studies can elucidate hydrogen bonding in other ILs with varied cation/anion combinations.
    • These findings can guide the design of ILs with tailored properties for specific applications.
    • Investigating the influence of temperature and pressure on IL hydrogen bonding dynamics is a promising future direction.