(Polar molecules, Non-polar molecules, etc.)

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Postby lasarro » Sat Nov 16, 2019 10:04 pm

How does NH2OH have a dipole-dipole intermolecular force? That means that NH2OH would have to be a polar molecule, but the electronegativity difference between all the elements is very small. Could someone please explain this? Maybe a picture showing the dipole moment if you could find one?

Charisse Vu 1H
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Joined: Thu Jul 25, 2019 12:17 am

Re: dipole-dipole

Postby Charisse Vu 1H » Sat Nov 16, 2019 10:17 pm

The OH group on the molecule is what makes the molecule polar. Its shape is a tetrahedral and the OH group is much more negative than the rest of the molecule.

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Re: dipole-dipole

Postby kpang_4H » Sun Nov 17, 2019 12:58 am

The electronegativity difference is big between the N and the H and also the O and the H which creates dipoles.

Melvin Reputana 1L
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Re: dipole-dipole

Postby Melvin Reputana 1L » Sun Nov 17, 2019 1:14 am

There is a dipole-dipole interaction on NH2OH because the electrons within the molecule are unequally shared. There is a nitrogen atom and oxygen atom that have higher electronegativities than hydrogen which means that the electrons would be pulled closer to these atoms. A good indicator if a molecule is polar or not in a tetrahedral shape is whether all the terminal atoms are of the same element; however, this molecule has a molecular shape of trigonal pyramidal due to only having three terminal atoms and 1 lone pair on the central atom.

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