Molecular Shape Affects Strength of Interaction

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

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kateminden
Posts: 63
Joined: Fri Sep 28, 2018 12:24 am

Molecular Shape Affects Strength of Interaction

Postby kateminden » Mon Nov 12, 2018 6:00 pm

Hello,
How does molecular shape contribute to the strength of interaction? Why is the interaction stronger between two rod-shaped molecules stronger than the interaction between two spherical molecules?
Thanks!

Hedi Zappacosta 1E
Posts: 66
Joined: Fri Sep 28, 2018 12:27 am

Re: Molecular Shape Affects Strength of Interaction

Postby Hedi Zappacosta 1E » Mon Nov 12, 2018 6:43 pm

it depends on how big the molecules are and how far apart the polar ends of each molecule are. For example, in dipole-dipole interactions, two spheres will have a weaker interaction because the positive end of one will be further from the negative end of the other. But, with two rod shaped molecules, the positive and negative ends are closer to each other when they are stacked on top of each other.

Brian Hom 2F
Posts: 60
Joined: Fri Sep 28, 2018 12:24 am

Re: Molecular Shape Affects Strength of Interaction

Postby Brian Hom 2F » Mon Nov 12, 2018 7:04 pm

The shape of a molecule contributes to the strength of the interaction because they interaction is stronger where there is more surface area where the dipoles are as close as possible. Two rods gives a stronger interaction as the dipoles are closer together. When the molecules are spheres, the opposite sided dipoles are too far to have a strong interaction.

A De Castro 14B 2H
Posts: 75
Joined: Fri Sep 28, 2018 12:29 am

Re: Molecular Shape Affects Strength of Interaction

Postby A De Castro 14B 2H » Mon Nov 12, 2018 9:53 pm

Do rod-shaped molecules induce dipole moments in spherical molecules?


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