Shape of Molecules and bond strength

Moderators: Chem_Mod, Chem_Admin

RobertXu_2J
Posts: 104
Joined: Fri Aug 30, 2019 12:17 am

Shape of Molecules and bond strength

Postby RobertXu_2J » Sat Nov 09, 2019 7:10 pm

Why does the shape of a molecule contribute to how strong the bond is between it and other molecules?

Haley Dveirin 1E
Posts: 101
Joined: Sat Jul 20, 2019 12:17 am

Re: Shape of Molecules and bond strength

Postby Haley Dveirin 1E » Sat Nov 09, 2019 7:12 pm

Because, for example, rod-shaped molecules when they bond can be closer together than two spherical molecules and therefore their bond is stronger.

Jielena_Bragasin2G
Posts: 104
Joined: Sat Aug 24, 2019 12:18 am
Been upvoted: 1 time

Re: Shape of Molecules and bond strength

Postby Jielena_Bragasin2G » Sun Nov 10, 2019 12:15 am

The shape of the molecule can also affect the intermolecular forces like induced dipole - induced dipole because the dispersion of the negative side and the positive side of the molecule on a longer/ rod like molecule will create a stronger induced dipole - induced dipole compared to spherical molecules.

805422680
Posts: 103
Joined: Sat Sep 14, 2019 12:16 am

Re: Shape of Molecules and bond strength

Postby 805422680 » Sun Nov 10, 2019 12:47 am

The shape of the molecule determines the bond strength as a more branched structure (such as 2,2- dimethylpropane) have smaller surface areas. As the intermolecular attractive forces are determined by this, the forces as stronger. Whereas for straight molecules, it is the opposite.

Joowon Seo 3A
Posts: 100
Joined: Sat Aug 24, 2019 12:17 am
Been upvoted: 1 time

Re: Shape of Molecules and bond strength

Postby Joowon Seo 3A » Sun Nov 10, 2019 1:01 pm

The shape affects it since a longer molecule has more surface area to interact with the other molecule than say a spherical molecule resulting in a stronger bond.

405268063
Posts: 102
Joined: Thu Jul 25, 2019 12:17 am

Re: Shape of Molecules and bond strength

Postby 405268063 » Sun Nov 10, 2019 1:52 pm

I believe the example Professor Lavelle used in class was the two rod shaped molecules vs. two spherical shaped molecules. The bonds in the two rod shaped molecules were stronger than the ones in the spherically shaped molecules because they were physically closer together.


Return to “Bond Lengths & Energies”

Who is online

Users browsing this forum: No registered users and 1 guest