Understanding Chemical Bonding: Why Last Sublevel Electrons Matter

Click For Summary

Discussion Overview

The discussion revolves around the concept of chemical bonding, specifically focusing on the role of last sublevel electrons in bond formation. Participants explore hybridization in carbon, particularly sp and sp3 hybridization, and the implications for the number of bonds carbon can form.

Discussion Character

  • Debate/contested
  • Conceptual clarification

Main Points Raised

  • One participant questions whether only the last sublevel electrons should be considered in chemical bonding, citing confusion from their textbook regarding carbon's bonding capabilities.
  • Another participant strongly disagrees with the assertion that sp hybridized carbon should only form three bonds, suggesting that the information in the book is incorrect.
  • There is a clarification that carbon is typically sp3 hybridized, which allows it to form four bonds, but participants note that sp and sp2 hybridization can also lead to four bonds.
  • A participant references Wikipedia, which suggests that valence bond theory predicts carbon forms two covalent bonds based on half-filled p-type orbitals, raising questions about the validity of this model in light of carbon's need for four electrons to complete its outer level.
  • There is a query about whether bonds are formed solely in the outer half-filled orbitals, indicating uncertainty about the bonding process.

Areas of Agreement / Disagreement

Participants express disagreement regarding the number of bonds carbon can form based on its hybridization state. There is no consensus on the interpretation of the valence bond theory in relation to carbon's bonding behavior.

Contextual Notes

Participants highlight potential limitations in their sources, including differing interpretations of hybridization and bonding predictions, as well as the need for clarity on the role of half-filled orbitals in bond formation.

scientifico
Messages
181
Reaction score
0
hello, to preview chemical bonds must be considered only the electrons in the last sublevel and not the electrons in all the level?
for example my book talking of carbon sp hybridation say that we shouldn't expect it make 4 bounds but only 3, why if the carbon need exactly 4 electron to complete the level?

thanks!
 
Chemistry news on Phys.org
What do you mean? Carbon is usually a sp3 hybrid. Thus it must make four bonds. You also said that you need to consider the outer sublevel. What do you mean?
 
ZealScience said:
Carbon is usually a sp3 hybrid. Thus it must make four bonds.

While in a way it can be true that sp3 is the most common carbon hybridization, it doesn't matter. When it is sp or sp2 it makes four bonds as well.
 
Why in Wikipedia i read The valence bond theory would predict, based on the existence of two half-filled p-type orbitals, that C forms two covalent bonds ?
According to the normal model Carbon need 4 electrons to complete the last level so is it wrong use this model?
Do the bond are formed ONLY in the more external half-filled orbitals ?

thank you
 

Similar threads

  • · Replies 13 ·
Replies
13
Views
21K
  • · Replies 11 ·
Replies
11
Views
3K
  • · Replies 9 ·
Replies
9
Views
3K
  • · Replies 11 ·
Replies
11
Views
3K
  • · Replies 9 ·
Replies
9
Views
4K
  • · Replies 3 ·
Replies
3
Views
2K
Replies
3
Views
7K
Replies
2
Views
10K
  • · Replies 1 ·
Replies
1
Views
1K
  • · Replies 19 ·
Replies
19
Views
10K