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# Does Trigonal Bipyramids have 180 degree angles?

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Why bother with a post grad course - waste of time? 17-10-2016
1. In my revision book, it doesn't show a 180 degree angle but on Wikipedia, it states 180 as one of the angles.
Do I have to draw this in my diagrams? And if so, how?
2. (Original post by weamy)
In my revision book, it doesn't show a 180 degree angle but on Wikipedia, it states 180 as one of the angles.
Do I have to draw this in my diagrams? And if so, how?
There is a 180 degree angle between the two axial substituents.
3. It is 90 degree between the top pair and the three planar pairs (120 degrees between those) and another 90 degrees to the bottom pair. Therefore the top and bottom pairs have 90+90 = 180 degrees separation.

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