How Many Sigma Bonds Are Present in This Molecule?

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Discussion Overview

The discussion revolves around the identification and counting of sigma bonds in a given molecular structure. Participants analyze a provided image to determine the correct number of sigma bonds, addressing potential errors in the depiction and assumptions about the molecule's structure.

Discussion Character

  • Technical explanation
  • Debate/contested
  • Mathematical reasoning

Main Points Raised

  • Some participants suggest that there are 19 sigma bonds in the molecule based on their counts.
  • Others argue that the quality of the image makes it difficult to accurately assess the number of sigma bonds, indicating that several bonds may be overlooked.
  • There is a mention of the importance of considering hydrogen atoms attached to cyclic carbons, as carbon is tetravalent and typically forms four bonds.
  • One participant points out a potential error in the hybridization of carbons in the structure, suggesting that the depiction may misrepresent the number of sp2 hybridized carbons.
  • Several participants emphasize the need to ensure all carbons are tetravalent when counting bonds.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the number of sigma bonds, with multiple competing views regarding the accuracy of the image and the counting process. Disagreements persist about the assumptions made concerning the structure of the molecule.

Contextual Notes

Limitations include the unclear quality of the provided images, which may lead to miscounting of sigma bonds, and the assumption that all carbons are tetravalent, which is not explicitly confirmed in the discussion.

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I suppose you mean sigma bonds.

Looks like you may be missing several. That's because the picture is lousy.
 
You did the same mistake UNknown2010 did - you assumed the picture is OK.
 
Right , to the OP - do not forget about the hydrogens on the cyclic carbons.
 
do you mean (CH2) ? I counted it !
 
There are three trivalent carbons on the picture.
 
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.
 
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
 
Last edited by a moderator:
  • #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.
 

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