How Many Sigma Bonds Are Present in This Molecule?

[UNknown 2010]

How much segma bonds are there ?
http://img161.imageshack.us/img161/144/89476797ug7.png

is it 19 segma bonds ?

 

[Borek]

I suppose you mean sigma bonds.

Looks like you may be missing several. That's because the picture is lousy.

 

[GCT]

How much segma bonds are there ?
http://img161.imageshack.us/img161/144/89476797ug7.png

is it 19 segma bonds ?

I am getting 19.

 

[Borek]

You did the same mistake UNknown2010 did - you assumed the picture is OK.

 

[GCT]

Right , to the OP - do not forget about the hydrogens on the cyclic carbons.

 

[UNknown 2010]

do you mean (CH₂) ? I counted it !

 

[Borek]

There are three trivalent carbons on the picture.

 

[GCT]

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.

 

[raglandrb]

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.

 

[UNknown 2010]

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 !

 

[Borek]

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

http://img126.imageshack.us/img126/4743/89476797ug7az1.th.png

Again, please check if ALL carbons are tetravalent.

 

[UNknown 2010]

http://img518.imageshack.us/img518/3377/64147087fe5.png

 

[Borek]

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.