## Dipole moment vs dipole bond

Abby Lam 3F
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Joined: Wed Sep 30, 2020 9:46 pm

### Dipole moment vs dipole bond

What is the difference between dipole moment and dipole bond?

Ria Nawathe 1C
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### Re: Dipole moment vs dipole bond

A dipole moment is a partial positive charge and partial negative charge within a molecule, though the molecule is as a whole electrically neutral. For example, the hydrogens in H2O have a partial positive charge and the oxygen has a partial negative charge due to the electronegativity difference between the atoms and their comparative ability to pull electrons. A dipole-dipole bond is an intermolecular force where 2 molecules that have dipoles are attracted to each other: the delta positive of one to the delta negative of the other and vice versa. Hope this helps!

Angel More 2J
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### Re: Dipole moment vs dipole bond

I think you are asking the difference between bond dipole/dipole moments formula and dipole-dipole forces.

Dipole-Dipole Forces are intermolecular attractions between two molecules. They are the weakest bonds and all polar covalent compounds have them

The dipole moments formula measure the polarity of a chemical bond within a molecule.

The formula is mu= delta * d
- mu = bond dipole
- delta = charge
- d = distance between partial charges (bond length)

You will not need to use the formula on the MT2, but know that an increase in bond length increases the dipole moments.

Marc Lubman 3B
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### Re: Dipole moment vs dipole bond

Hi, a dipole moment refers to the polarity of a molecule or bond. So, if a bond has a particular positive charge on one end and a negative on the other due to differences in electronegativity (or, if induced, due to interaction with another molecule), then it has a dipole moment of a particular value (which, combined with the dipole moments of other constituent bond dipole moments in the molecule, contributes to the total molecular dipole moment). A dipole bond refers to the attraction that occurs between two separate polar molecules. For example, the positive end of one molecule of chloromethane forms a dipole bond with the negative end of another molecule of chloromethane.

Samuel Flores 1E
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Joined: Wed Sep 30, 2020 9:51 pm

### Re: Dipole moment vs dipole bond

Hello! A dipole moment is a measure of the polarity of a certain bond. Therefore, if we have a polar bond, then it will have a non-zero dipole moment. Of course, a polar bond arises from the unequal sharing of electrons between atoms (differences in electronegativity), so a dipole moment is also a measure of the difference in electronegativity between atoms.

Hope this helps!

LeahSWM 2E
Posts: 54
Joined: Wed Sep 30, 2020 9:47 pm

### Re: Dipole moment vs dipole bond

Samuel Flores 2C wrote:Hello! A dipole moment is a measure of the polarity of a certain bond. Therefore, if we have a polar bond, then it will have a non-zero dipole moment. Of course, a polar bond arises from the unequal sharing of electrons between atoms (differences in electronegativity), so a dipole moment is also a measure of the difference in electronegativity between atoms.

Hope this helps!

This helped me thank you!