Can anyone help me with an organic chemistry problem involving determining sigma bonds? and NYC, 40 Bond, Gate, Draft Design

Can anyone help me with an organic chemistry problem involving determining sigma bonds?

I need to know how many sigma bonds are in the following compound:

CH3-CH=CH-CH2-CH=CH-CH3

I thought that sigma bonds were related to single bonds and 1 of the double bonds, so i thought the answer was 6, but webassign says the answer is wrong. It also said that 2,3, and 4 are all wrong. Can someone please help?


Bond best answer:

Answer by Adam
There are 18 sigma bonds. You have missed the ones with Hydrogen. Ex: CH3 has 3 sigma bonds, -CH= has 3 sigma bonds and 1 pi bond. So count again and you will find there are 18 :)

Sigma bonds are not only the bonds between Carbon-Carbon, but also between Carbon-Hydrogen or Carbon-X.

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NYC, 40 Bond, Gate, Draft Design


Image by Detlef Schobert
Building: New York City, 40 Bond Street, Completion 2007.
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Design architects: Herzog & de Meuron.

Gate, draft design, samples, 2005.

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