Bond Angle

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

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Frenz Cabison 1B
Posts: 54
Joined: Fri Sep 29, 2017 7:07 am

Bond Angle

Postby Frenz Cabison 1B » Sun Nov 26, 2017 6:29 pm

When we are asked to find the expected bond angle, do we have to be very specific or can we just give an estimate? For example, on problem 4.21 (d), N2H4 is trigonal pyrmidal and so the bond angle is 107° according to the answer key. If we say that the bond angle is slightly less than 109.5°, would that be enough?

Abigail Yap 2K
Posts: 51
Joined: Fri Sep 29, 2017 7:07 am

Re: Bond Angle

Postby Abigail Yap 2K » Sun Nov 26, 2017 6:44 pm

Hi,

Unless we are given this information, we cannot know the exact angles. It is enough to say that the angle is slightly less than 109.5.

Hope this helps!

Dylan Davisson 2B
Posts: 50
Joined: Thu Jul 27, 2017 3:00 am
Been upvoted: 2 times

Re: Bond Angle

Postby Dylan Davisson 2B » Sun Nov 26, 2017 6:49 pm

Because the actual bond angles of molecules not fixed by symmetry are found experimentally and differ depending on the atoms involved, the approximations of the bond angles should be more than sufficient. You would need to employ spectroscopy, most likely, if you you wanted to find the true bond angels of some of the structures.


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