How Many Sigma Bonds Are Present in This Molecule?

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In summary, there is a discussion about the number of sigma bonds present in a molecule shown in a picture. The initial question is how many sigma bonds are there, followed by a correction of the term "segma" to "sigma." The original poster (OP) and another user confirm the count of 19 sigma bonds. However, another user points out that there may be missing sigma bonds due to errors in the picture and the fact that not all carbons are properly labeled as tetravalent. The discussion continues with clarification on the number of carbons and their hybridization, and the need to label all explicit hydrogen atoms. The final statement is a request for the OP to check the tetravalence of all carbons
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  • #2
I suppose you mean sigma bonds.

Looks like you may be missing several. That's because the picture is lousy.
 
  • #3
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  • #4
You did the same mistake UNknown2010 did - you assumed the picture is OK.
 
  • #5
Right , to the OP - do not forget about the hydrogens on the cyclic carbons.
 
  • #6
do you mean (CH2) ? I counted it !
 
  • #7
There are three trivalent carbons on the picture.
 
  • #8
UNknown 2010 said:
do you mean (CH2) ? I counted it !


No the hydrogens attached to the cyclic carbons , note that carbon is tetravalent , this means it forms four bonds , it is assumed all of those carbons with three bonds on the cyclic motif has hydrogens attached to them.
 
  • #9
it helps when drawing line angle structures to label all the explicit H's. If you look closer at your ring, the way its drawn you have 4 sp2 hybridized carbons, when there's really only 1, the carbonyl.
 
  • #10
Oh that picture has a mistake

see this please
http://img126.imageshack.us/my.php?image=89476797ug7az1.png
I counted sigma bonds and they were 19 !
 
  • #12
http://img518.imageshack.us/img518/3377/64147087fe5.png
 
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  • #13
Geez...

Please check if ALL carbons are tetravalent.

Like in: you look at the carbon, you count 1, 2, 3, 4 and then you move to the next one.
 

FAQ: How Many Sigma Bonds Are Present in This Molecule?

How do you determine the number of sigma bonds in a molecule?

The number of sigma bonds in a molecule can be determined by counting the number of single bonds between two atoms.

Can a molecule have more than one sigma bond?

Yes, a molecule can have multiple sigma bonds, as long as each bond is between two different atoms.

Are all single bonds considered sigma bonds?

Yes, all single bonds are considered sigma bonds because they involve the overlap of one electron orbital from each atom.

How does the number of sigma bonds affect the strength of a molecule?

The number of sigma bonds can affect the strength of a molecule by making it more stable. More sigma bonds mean more shared electrons, creating a stronger bond between atoms.

Can a molecule have both sigma and pi bonds?

Yes, a molecule can have both sigma and pi bonds. Sigma bonds are formed by the end-to-end overlap of atomic orbitals, while pi bonds are formed by the side-to-side overlap of atomic orbitals.

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