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Difference between molecular shape

Posted: Thu Nov 14, 2019 12:09 am
by Amy Luu 2G
What is the difference between trigonal pyramidal and T-shaped? Similarly, what is the difference between seesaw and tetrahedral? I keep choosing one but the answer is actually the other.

Re: Difference between molecular shape

Posted: Thu Nov 14, 2019 12:12 am
by Mashkinadze_1D
A trigonal planar shape has no lone pairs attached to the central atom and a T shaped has two lone pairs attached to the central atom. Similarly, a tetrahedral structure has no lone pairs attached to the central atom, while a seesaw would have one lone pair attached to the central atom. Hope this helps!

Re: Difference between molecular shape

Posted: Thu Nov 14, 2019 3:05 am
by Sanjana K - 2F
Seesaws: 1 LP, seesaw molecular shape, trigonal bipyramidal electron arrangement, bond angles of 90 and 120 degrees
Tetrahedral: 0 LP, tetrahedral molecular shape, tetrahedral electron arrangement, bond angles of 109.5 degrees

Trigonal pyramidal: 1 LP, trigonal pyramidal molecular shape, tetrahedral electron arrangement, bond angles of 109.5 degrees
T-shape: 2 LP, T-shape molecular shape, trigonal bipyramidal electron arrangement, bond angles of 90 and 120 degrees

Re: Difference between molecular shape

Posted: Thu Nov 14, 2019 9:08 am
by Sean Cheah 1E
I found this simple table online that might help you visualize and remember all the various molecular geometries.
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