Why isn't ClF3 trigonal planar?

  • Thread starter prakhargupta3301
  • Start date
  • Tags
    Structural
In summary, the conversation discusses the molecular geometry of ClF3, which can either have a triagonal bi-pyramidal arrangement and T-shape molecular geometry or a triagonal planar shape. The reason why it is not like the second case is because in VSEPR theory, non-bonding electron pairs are sterically more demanding than bound electron pairs, meaning they need more space for themselves and occupy a larger volume. The distance between the two non-bonding pairs is not as relevant as the repulsion from the next nearest neighbor. The individual requesting the explanation thanks the summarizer and asks for further clarification on the term "sterically more demanding."
  • #1
prakhargupta3301
58
1
JTvl45.png

I know ClF3 has triagonal bi-pyramidal arrangement and T-shape molecular geometry. (as shown in first diag.). However, it can also be 2nd case. In this one, the shape will be triagonal planar. Also, electrons will be farthest. So why isn't ClF3 like second case?
 

Attachments

  • JTvl45.png
    JTvl45.png
    955 bytes · Views: 18,791
Chemistry news on Phys.org
  • #2
In VSEPR theory, non-bonding electron pairs are sterically more demanding than bound electron pairs. In the first formula, each non-bonding electron pair has only two neighbours in a 90 degree separation while in the 2nd one, each has 3. Whether the distance between the two non-bonding pairs is 120 or 180 degrees will be rather irrelevant compared to the next neighbour repulsion.
 
  • Like
Likes prakhargupta3301
  • #3
I get what you mean. Thank you.
But would you be kind enough to explain what
DrDu said:
'sterically more demanding than bound electron pairs'
means?
[I did look up the meaning of steric but the meaning still isn't clear]
Thanks.
 
  • #4
Need more space for themselves, occupy larger volume.
 

1. Why is ClF3 not a trigonal planar molecule?

ClF3 is not a trigonal planar molecule because it has a steric number of 5, which means it has 5 regions of electron density around the central chlorine atom. According to VSEPR theory, this results in a square pyramidal molecular geometry, rather than a trigonal planar one.

2. Can you explain the bond angles in ClF3?

The bond angles in ClF3 are approximately 90 and 120 degrees. This is due to the presence of 3 fluorine atoms and 2 lone pairs of electrons around the central chlorine atom, resulting in a distorted square pyramidal structure.

3. What factors contribute to the molecular geometry of ClF3?

The molecular geometry of ClF3 is primarily determined by the steric number, which is influenced by the number of regions of electron density around the central atom. Additionally, the presence of lone pairs and the repulsion between them also impact the molecular geometry.

4. Is ClF3 a polar molecule?

Yes, ClF3 is a polar molecule due to the unequal distribution of electron density caused by the difference in electronegativity between chlorine and fluorine atoms. This results in a dipole moment, with chlorine having a partial negative charge and fluorine having a partial positive charge.

5. What are some real-world applications of ClF3?

ClF3 is primarily used as a fluorinating agent in industrial processes to produce fluorocarbons. It is also used in the production of uranium hexafluoride, a compound used in the nuclear industry. Additionally, ClF3 is a potent oxidizing agent and has been studied for potential use in rocket propellants.

Similar threads

  • Chemistry
Replies
4
Views
5K
Replies
3
Views
42K
  • Biology and Chemistry Homework Help
Replies
5
Views
12K
  • Chemistry
Replies
19
Views
26K
  • Biology and Chemistry Homework Help
Replies
2
Views
12K
Replies
2
Views
14K
  • Quantum Physics
Replies
0
Views
75
Replies
3
Views
1K
  • Biology and Chemistry Homework Help
Replies
1
Views
6K
Back
Top