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# How many sigma and pi bonds are present in tetracyanoethylene?A. Nine $$\sigma$$ and nine $$\Pi$$B. Five $$\Pi$$ and nine $$\sigma$$C. Nine $$\sigma$$and seven $$\Pi$$D. Eight $$\sigma$$and eight $$\Pi$$

Last updated date: 25th Jun 2024
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Hint: The pi bonds are defined as the bonds which are formed by the side wise overlapping of the atom orbital. The pi bonds are formed after the sigma bonding takes place. The sigma bond is formed by the axial overlapping of the atomic orbital.

So after seeing the structure we get to know that the central carbon atoms attached to the side carbon are bonded by a single bond. So all single bonds are sigma bonds. So here singly bonded sigma bonds are 4. The double bonded sigma bond in this structure is 1 which is the central C-C bond. The triple bonded sigma bond in this structure is 4 which are carbon nitrogen bonds. So the total sigma bonds are 9 $$\sigma$$bonds. So now the pi bond in double bonded atoms is 1 that is the central C-C bond. The other 2 pi bonds in each triple bonded carbon nitrogen bonds are in total 8. So the total pi bonds are 9.