Question

How many sigma amd pi bonds are there in molecule of tetracyanoethylene?

Answer 1

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 bonds are present. 2 bonds per cyanide molecule and there are 4 cyanide molecule attached to double bonded carbon and 1 pi bond of ethylene