Determining Bond Angles

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

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Madeera_Mian_3B
Posts: 30
Joined: Fri Sep 28, 2018 12:24 am

Determining Bond Angles

Postby Madeera_Mian_3B » Wed Nov 14, 2018 11:44 pm

In Lecture sometimes we would divide the number of bonds by 360, but sometimes that does not work. I was wondering if we have to memorize the association between bond angles and their geometry or is there some other way to determine bond angles?

Jeannine 1I
Posts: 73
Joined: Fri Sep 28, 2018 12:27 am

Re: Determining Bond Angles

Postby Jeannine 1I » Wed Nov 14, 2018 11:59 pm

I think knowing their 3-Dimensional geometry definitely helps determine their bond angles! I would generally say though, that the most common angles are 90, 109.5,120, and 180. It's usually either those angles, or slightly less than those angles (when lone pairs are involved). Thinking about what the shape of that molecule is, and knowing what it looks like in 3-D helps me understand what their corresponding angles would be logically.

With that said, I don't think there's any other better way to figure out bond angles. Hope this helps!


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