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How much segma bonds are there ?

  1. Oct 14, 2008 #1
    How much segma bonds are there ?
    [​IMG]

    is it 19 segma bonds ?
     
  2. jcsd
  3. Oct 14, 2008 #2

    Borek

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    I suppose you mean sigma bonds.

    Looks like you may be missing several. That's because the picture is lousy.
     
  4. Oct 14, 2008 #3

    GCT

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    I am getting 19.
     
  5. Oct 15, 2008 #4

    Borek

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    You did the same mistake UNknown2010 did - you assumed the picture is OK.
     
  6. Oct 15, 2008 #5

    GCT

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    Right , to the OP - do not forget about the hydrogens on the cyclic carbons.
     
  7. Oct 15, 2008 #6
    do you mean (CH2) ? I counted it !
     
  8. Oct 15, 2008 #7

    Borek

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    There are three trivalent carbons on the picture.
     
  9. Oct 15, 2008 #8

    GCT

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    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.
     
  10. Oct 15, 2008 #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 theres really only 1, the carbonyl.
     
  11. Oct 16, 2008 #10
    Oh that picture has a mistake

    see this please
    [​IMG]
    I counted sigma bonds and they were 19 !!
     
  12. Oct 16, 2008 #11

    Borek

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    For some reason picture in your post doesn't show, but that's how it looks:

    [​IMG]

    Again, please check if ALL carbons are tetravalent.
     
  13. Oct 16, 2008 #12
  14. Oct 16, 2008 #13

    Borek

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    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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