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Hydrogen Bonding and Dispersion

Posted: Sun Nov 24, 2019 11:55 pm
by Diana A 2L
I'm a bit confused between the concepts of hydrogen bonding and dispersion. Can someone clarify the difference between the two?

Re: Hydrogen Bonding and Dispersion

Posted: Mon Nov 25, 2019 12:25 am
by JonathanS 1H
Hydrogen bonding occurs between hydrogen bonded to a F, O, or N and a lone pair of electrons on one of those molecules. London dispersion forces occur between all atoms/molecules and are the same as induced dipole-induced dipole forces in which random e- movement causes areas that are partially charged and cause partial charges in another molecule, which leads to attraction.

Re: Hydrogen Bonding and Dispersion

Posted: Mon Nov 25, 2019 1:06 am
by aishwarya_atmakuri
Dispersion occurs between two nonpolar atoms/molecules. Hydrogen bonding occurs when an H is bonded to a highly electronegative atom.

Re: Hydrogen Bonding and Dispersion

Posted: Mon Nov 25, 2019 7:35 am
by AronCainBayot2K
Hydrogen bonding occurs when hydrogen is bonded to Nitrogen, Oxygen, or Fluorine. Dispersion occurs when two non polar molecules interact. Also dispersion is the most weakest intermolecular force, while hydrogen bonding is one of the strongest.

Re: Hydrogen Bonding and Dispersion

Posted: Mon Nov 25, 2019 11:12 am
by 105335337
Dispersion occurs between two non polar molecules. When two non polar molecules get close into contact, the electrons will cause an induced-dipole onto both molecules, making one side positive and one slightly negative. This yields them to be attracted to each other, creating LDF aka dispersion.

H bonding is a select type of bonding only between hydrogen and N/O/F molecules. It is quite strong compared to the lower IMFs & is considered extremely important in biological compounds.

Re: Hydrogen Bonding and Dispersion

Posted: Mon Nov 25, 2019 12:48 pm
by sarahforman_Dis2I
Diana A 1G wrote:I'm a bit confused between the concepts of hydrogen bonding and dispersion. Can someone clarify the difference between the two?


Hydrogen bonding occurs between H and either N,F, or O (three very electronegative attractions). This means that H-bonding is an extremely strong dipole dipole interaction. Dispersion forces are due to instantaneous dipoles and the stickability of atoms, meaning that they occur between all molecules. For dispersion forces, fixed dipoles are not needed.