Trigonal pyramidal angles

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

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tonyhu
Posts: 57
Joined: Tue Sep 24, 2019 12:17 am

Trigonal pyramidal angles

Postby tonyhu » Thu Nov 14, 2019 3:56 pm

Why are the angles 109.5? they don't add up to 360?

Bryce Barbee
Posts: 103
Joined: Wed Sep 18, 2019 12:20 am

Re: Trigonal pyramidal angles

Postby Bryce Barbee » Thu Nov 14, 2019 4:10 pm

This isn't exactly answering your question but I have the tetrahedral angles at 109.5. For the trigonal bipyramidal shape, the trigonal bond angles are 120 and the axial bond angles are 90 and 180.

nickianel_4b
Posts: 50
Joined: Thu Jul 25, 2019 12:17 am

Re: Trigonal pyramidal angles

Postby nickianel_4b » Thu Nov 14, 2019 4:26 pm

They don't have to add up to 360 because 360 is for a 2D circle, whereas molecular geometry deals with 3D shapes.

705198479
Posts: 55
Joined: Wed Sep 18, 2019 12:20 am

Re: Trigonal pyramidal angles

Postby 705198479 » Thu Nov 14, 2019 4:28 pm

do we need to remember the angles?

705198479
Posts: 55
Joined: Wed Sep 18, 2019 12:20 am

Re: Trigonal pyramidal angles

Postby 705198479 » Thu Nov 14, 2019 4:28 pm

do we need to remember the angles?


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