Drawing Molecular Structures

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

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Yazmin Bocanegra 3L
Posts: 51
Joined: Thu Jul 25, 2019 12:17 am

Drawing Molecular Structures

Postby Yazmin Bocanegra 3L » Thu Nov 14, 2019 6:29 pm

When drawing molecular structures, how can you tell when to draw a line (covalent bond), a shaded triangle, and dashes?

Michelle Xie 2B
Posts: 99
Joined: Sat Aug 17, 2019 12:18 am

Re: Drawing Molecular Structures

Postby Michelle Xie 2B » Thu Nov 14, 2019 6:38 pm

The solid triangle represents the atom coming out of the page towards you. The dashed lines represent the atom going away from you into the page. Lines are used to draw atoms that are on the same plane as the paper. The other two symbols are when the atoms come out of the plane.

Claire Lo 3C
Posts: 55
Joined: Sat Aug 17, 2019 12:18 am

Re: Drawing Molecular Structures

Postby Claire Lo 3C » Thu Nov 14, 2019 8:20 pm

You determine the VSEPR structure of the molecule first. Then you can use lines to represent atoms on the same plane with the paper, solid triangles as atoms coming towards you, and dashed lines as atoms going away from you.

Jade Hinds 2B
Posts: 75
Joined: Tue Sep 10, 2019 12:16 am

Re: Drawing Molecular Structures

Postby Jade Hinds 2B » Thu Nov 14, 2019 8:23 pm

anyone have an example of this? I'm still practicing drawing the structures

andrewcj 2C
Posts: 102
Joined: Thu Jul 11, 2019 12:17 am

Re: Drawing Molecular Structures

Postby andrewcj 2C » Thu Nov 14, 2019 9:27 pm

It's important to remember that the shaded/dashed triangles still represent bonds, just they help show a 3D shape in 2D.

RRahimtoola1I
Posts: 102
Joined: Fri Aug 09, 2019 12:15 am

Re: Drawing Molecular Structures

Postby RRahimtoola1I » Sat Nov 16, 2019 2:47 pm

Will we need to know how to draw the molecular structures in this way for the test?

Sanjana Munagala_1j
Posts: 103
Joined: Sat Aug 24, 2019 12:17 am
Been upvoted: 1 time

Re: Drawing Molecular Structures

Postby Sanjana Munagala_1j » Sat Nov 16, 2019 2:50 pm

As long as you are able to identify the VSEPR shape you should be more than fine. Professor Lavelle jokingly repeated in lecture that he was not going to test us on our artistic abilities.
Hope that helps!

305416361
Posts: 50
Joined: Fri Aug 09, 2019 12:17 am

Re: Drawing Molecular Structures

Postby 305416361 » Sat Nov 16, 2019 3:25 pm

The lines represent bonds that are to the side or up/down, the shaded triangle symbolizes a bond that is going forward (towards you), and the dashes represent bonds that are going backwards (away from you). However, for the purpose of this class, we don't need to draw them that specifically, we can just use lines for all bonds as long as we correctly identify the shape/structure.

Megan Ngai- 3B
Posts: 50
Joined: Fri Aug 09, 2019 12:17 am

Re: Drawing Molecular Structures

Postby Megan Ngai- 3B » Sat Nov 16, 2019 3:45 pm

Lavelle said to just know how to name them.


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