The total number of sigma and pi bonds in C2(CN)4 are:
(1) 9 sigma and 9 pi (2) 9 sigma and 18 pi (3) 18 sigma and 9 pi (4) 18 sigma and 18 pi
Please explain with lewisdot structure
[1]Each time an atom is liked to another one, you have a sigma bond.
For the cyano groups : N (triple) C --> one sigma bond and 2 pi bonds. You have got 4 of those, that means 4 sigma bonds and 8 pi bonds. See source Wikipedia Triple-Bond.
There is a simple bond between the 2 central C=C linking the 4 cyano groups. That means 4 sigma bond.
C=C --> one sigma bond and one pi bond.
Total is then 9 sigma and 9 pi bonds.
For the cyano groups : N (triple) C --> one sigma bond and 2 pi bonds. You have got 4 of those, that means 4 sigma bonds and 8 pi bonds. See source Wikipedia Triple-Bond.
There is a simple bond between the 2 central C=C linking the 4 cyano groups. That means 4 sigma bond.
C=C --> one sigma bond and one pi bond.
Total is then 9 sigma and 9 pi bonds.
