Atom Connectivities

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Sameer Chowdhury 3C
Posts: 92
Joined: Wed Sep 30, 2020 9:41 pm

Atom Connectivities

Postby Sameer Chowdhury 3C » Fri Nov 20, 2020 11:25 pm

For week 7/8 sapling problems, number 17 asks about resonance structures. It mentions in the solutions that resonance structures must all have the same atom connectivities. Could anyone explain to me what that is?

Vivian Hoang 1H
Posts: 102
Joined: Wed Sep 30, 2020 10:09 pm

Re: Atom Connectivities

Postby Vivian Hoang 1H » Fri Nov 20, 2020 11:37 pm

I think connectivity refers to the way they are attached, or in other words, the pattern of chemical bonds between the atoms.

IreneGi2I
Posts: 93
Joined: Wed Sep 18, 2019 12:19 am

Re: Atom Connectivities

Postby IreneGi2I » Sun Nov 22, 2020 8:36 pm

The atom connectivity means the specific pattern of chemical bonds between atoms in a molecule!

Pranav Kadiyala 1A
Posts: 126
Joined: Wed Sep 30, 2020 9:58 pm

Re: Atom Connectivities

Postby Pranav Kadiyala 1A » Mon Nov 23, 2020 11:16 pm

To elaborate, resonance structures solely mean the delocalization of electrons, meaning the only thing that can change are the locations of electrons (like the movement of a double bond). The atoms must remain in the same place, as said above, and connected to the same atoms in the same position for it to be resonance.

Rose_Malki_3G
Posts: 127
Joined: Wed Sep 30, 2020 10:02 pm

Re: Atom Connectivities

Postby Rose_Malki_3G » Tue Nov 24, 2020 1:50 am

It means that the atoms are not being moved but rather it is the actual electrons that are delocalized/move to create different resonance structures.

AnnaNovoselov1G
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Re: Atom Connectivities

Postby AnnaNovoselov1G » Tue Nov 24, 2020 9:11 am

Connectivity refers to how atoms are connected/arranged.
If 2 molecules have the same molecular formula, but different connectivity, they would be called constitutional isomers. Isomers are molecules that have the same formula but different shapes.

Here's an example to illustrate the concept:

2-methylpentene and 3-methylpentene have the same molecular formula, but in 2-methylpentene, the methyl group is attached to the second carbon, but in 3-methylpentene, it's attached to the third carbon.


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