How many sigma and pi bonds are present in a molecule of cumulene?

1 Answer
reudhreghs
Apr 9, 2016

#7sigma + 3pi#

Explanation:

http://www.ochempal.org/index.php/alphabetical/c-d/cumulene/

This is a molecule of cumulene, #C_4H_4#.

Single bonds are one #sigma#-bond, while double bonds are one #sigma# and one #pi#-bond.

#sigma# and #pi#-bonds are just ways in which electron orbitals interact to form bonds - #sigma# are stronger bonds, but you can't have more than one between the same two atoms.

Cumulene has three double bonds and four single bonds, or,

#3(sigma + pi) + 4sigma = 7sigma + 3pi#

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