Shape of the Molecule Contributes to Strength of Interaction

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Jackie Ngo 1C
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Joined: Fri Sep 29, 2017 7:06 am

Shape of the Molecule Contributes to Strength of Interaction

Postby Jackie Ngo 1C » Sun Nov 11, 2018 11:35 pm

In this section of the notes from Friday's lecture, it was said that Pentane and 2,2-Dimethylpropane have the same molecular formula, but are physically shaped differently. How is that so? I jotted the notes down really fast so after glancing over them again, I don't quite get it conceptually.

Iris Bai 2K
Posts: 60
Joined: Fri Sep 28, 2018 12:18 am

Re: Shape of the Molecule Contributes to Strength of Interaction

Postby Iris Bai 2K » Mon Nov 12, 2018 12:05 am

Pentane is just a string of 5 carbon molecules bonded to hydrogen atoms with single bonds. 2,2-Dimethylpropane is a string of 3 carbon atoms with two methyl groups attached to the second carbon in the chain (it looks like a + sign) with hydrogens bonded to the outer carbon atoms. The have the same molecular formula but are configured differently.

Hannah Faris 1C
Posts: 34
Joined: Fri Sep 28, 2018 12:18 am

Re: Shape of the Molecule Contributes to Strength of Interaction

Postby Hannah Faris 1C » Sun Nov 18, 2018 1:23 pm

Yeah just to add on a little more, molecular formula only gives the ratio of elements in a compound. Without the full name of the compound you really wouldn't know the shape/configuration at all.


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