tetrahedral vs. trigonal pyramidal

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

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tetrahedral vs. trigonal pyramidal

Postby Hannah_1G » Wed Nov 20, 2019 10:42 pm

Are tetrahedral and trigonal pyramidal the same?

Abigail Sanders 1E
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Joined: Wed Sep 11, 2019 12:16 am

Re: tetrahedral vs. trigonal pyramidal

Postby Abigail Sanders 1E » Wed Nov 20, 2019 11:03 pm

Tetrahedral and trigonal pyramidal have the same electron structure: 4 electron density regions surrounding a central molecule) but they have different molecular structures. For tetrahedral there are 4 electron density regions around the central atom that consist of 4 different atoms. In trigonal byramidal there are three surrounding atoms and a lone pair.

Joanne Lee 1J
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Joined: Thu Jul 25, 2019 12:15 am

Re: tetrahedral vs. trigonal pyramidal

Postby Joanne Lee 1J » Thu Nov 21, 2019 2:17 pm

No tetraderal and trigonal pyramidal are not the same. Tetradral has four bonding pair and zero lone pairs whereas trigonal pyramidal has three bonding pairs and one lone pair.

Megan Ngai- 3B
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Joined: Fri Aug 09, 2019 12:17 am

Re: tetrahedral vs. trigonal pyramidal

Postby Megan Ngai- 3B » Thu Nov 21, 2019 3:04 pm

They are not the same. They both have four regions of electron density. However, tetrahedral has zero lone pairs which tribal pyramidal has one lone pair.

Jenna Ortiguerra 4G
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Joined: Sat Aug 17, 2019 12:18 am

Re: tetrahedral vs. trigonal pyramidal

Postby Jenna Ortiguerra 4G » Thu Nov 21, 2019 3:08 pm

A molecule has a tetrahedral shape when the central atom is bonded to four atoms and has no lone pairs (bond angle is 109.5 degrees). A trigonal pyramidal molecule has a central atom that has one lone pair and is bonded to three atoms (the lone pair causes repulsion, causing the angle to be slightly less than 109.5 degrees).

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