question_answer

How many \[\sigma \] and \[\pi \] bonds are there in the molecule of tetracyano ethylene \[{{(CN)}_{2}}C=C{{(CN)}_{2}}\]?

A)  \[9\sigma \] and \[9\pi \]     

B)  \[5\sigma \] and \[9\pi \]

C)  \[9\sigma \] and \[7\pi \]        

D)  \[5\sigma \] and \[8\pi \]

Correct Answer: A

Solution :

    The structure of tetracyano ethylene is as: Hence, there are \[9\sigma \]and \[9\pi \] bonds are present.