Total Bonds in Ethyne - 3σ & 2π

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In summary, ethyne, also known as acetylene, has a total of three bonds - two single bonds between the carbon and hydrogen atoms, and a triple bond between the two carbon atoms. The 3σ bond in ethyne is the strongest bond, contributing to its stability and linear shape. It is formed by the overlap of two sp hybrid orbitals from the carbon atoms. Ethyne also has two π bonds, which are formed by the overlap of two p orbitals from the carbon atoms. These bonds are less stable but still play an important role in the molecule's bonding. The presence of three bonds makes ethyne highly reactive, making it a useful precursor for the synthesis of organic compounds. Both the 3σ and
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Homework Statement


In the hybradization of ethyne molecule, how many σ and ∏ bonds are being formed?


The Attempt at a Solution


Since, there is a triple bond between the carbon atoms, it should form 2 ∏ bonds and 1 σ bond.
Relatively there will be 2 other σ bonds between Carbon-Hydrogen.

So, all together, there are supposed to be 3 σ and 2 ∏ bonds.
Want to know if the above theory is right?
 
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That's correct.
 
  • #3
Yes. Perfect. The only problem that happens in multiple choice questions is that students might forget to mention that the triple bond also contributes a sigma bond.
 

1. What is the total number of bonds in ethyne?

Ethyne, also known as acetylene, has a total of three bonds. This is because it contains two carbon atoms and two hydrogen atoms, each forming a single bond with each other. The third bond is a triple bond between the two carbon atoms, resulting in a total of three bonds in ethyne.

2. What is the significance of the 3σ bond in ethyne?

The 3σ bond in ethyne is formed by the overlap of two sp hybrid orbitals from the two carbon atoms. This bond is the strongest bond in ethyne, making it highly stable and resistant to breaking. It also contributes to the linear shape of the molecule.

3. How many π bonds are present in ethyne?

Ethyne has two π bonds, which are formed by the overlap of two p orbitals from the two carbon atoms. These bonds are less stable than the 3σ bond, but they still play an important role in the overall bonding of the molecule.

4. How does the number of bonds in ethyne affect its reactivity?

The presence of three bonds in ethyne makes it a very reactive molecule. The triple bond is highly susceptible to breaking, allowing ethyne to readily participate in chemical reactions. This reactivity is what makes it a useful precursor for the synthesis of various organic compounds.

5. Are there any unique properties of the 3σ and 2π bonds in ethyne?

Yes, both the 3σ and 2π bonds have unique properties that differ from other types of bonds. The 3σ bond is highly directional, meaning that it allows for rotation of the molecule around its axis. The 2π bonds, on the other hand, are non-directional and contribute to the delocalization of electrons in the molecule, making it more stable.

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