Question

How many sigma and pi bonds are present in
tetracyanoethylene ?
(A) Nine sigma and nine pie (B) Five sigma and nine pie
(C) Nine sigma and Seven pie (D) Eight sigma and eight pie​

Answer 1

Explanation:

A triple bond contains 2 pi bond and a sigma bond. And a double bond contains a single bond and a pi bond.

Here 9 pi bonds and 9 sigma bond are present. 2 bonds per cyanide molecules and there are 4 cyanide molecule attached to double bonded carbon atom with single sigma bond and 2 pi bonds with carbon and this carbon further attach to ethylene carbon with sigma bond.