Drawing Lewis Structures with VSPER

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

Moderators: Chem_Mod, Chem_Admin

sophiebillings1E
Posts: 60
Joined: Fri Sep 28, 2018 12:27 am

Drawing Lewis Structures with VSPER

Postby sophiebillings1E » Sat Nov 10, 2018 6:34 pm

When drawing the Lewis structure of a trigonal planar model does it matter if the spacing is 120 degrees or can you draw it how we did previously then specify that the angle is 120 degrees.

Gabriela Aguilar 4H
Posts: 30
Joined: Fri Sep 28, 2018 12:29 am

Re: Drawing Lewis Structures with VSPER

Postby Gabriela Aguilar 4H » Sat Nov 10, 2018 6:43 pm

If I am not mistaken I remember Dr. Lavelle saying that the correct way to draw the Lewis structure would be with the 120-degree spacing, but it is fine to draw it without the spacing.

Irene Zhou 1E
Posts: 73
Joined: Fri Sep 28, 2018 12:18 am

Re: Drawing Lewis Structures with VSPER

Postby Irene Zhou 1E » Sat Nov 10, 2018 8:26 pm

I think drawing it either way would be fine as long as you specify that the molecule is trigonal planar and the bond angle is 120 degrees. Drawing it in its actual position would be a good way to visualize the bond angle though!

Jonathan Pai 2I
Posts: 121
Joined: Fri Sep 28, 2018 12:27 am

Re: Drawing Lewis Structures with VSPER

Postby Jonathan Pai 2I » Sat Nov 10, 2018 8:42 pm

Lewis structures do not have to be drawn like its shape because in the complex shapes it would be difficult and pointless to try to replicate the 3D shape in 2D. That's why knowing the name and bond angle is important in order to specify.

Andrewwiner4D
Posts: 32
Joined: Fri Sep 28, 2018 12:28 am

Re: Drawing Lewis Structures with VSPER

Postby Andrewwiner4D » Sat Nov 10, 2018 9:09 pm

When it is telling you to draw the VSEPR structure, which I feel we will only be doing from now on, you must specify the bond length.

michelle
Posts: 62
Joined: Fri Sep 28, 2018 12:23 am

Re: Drawing Lewis Structures with VSPER

Postby michelle » Sat Nov 10, 2018 9:18 pm

Lewis structure illustrates 2-D structures while the molecular shape is 3D. So it does not necessarily need to correspond to each other. Lewis structures only need to give a guideline to molecular shapes.


Return to “Determining Molecular Shape (VSEPR)”

Who is online

Users browsing this forum: No registered users and 2 guests