question_answer

The enolic form of ethyl acetoacetate as below has                                                                        

A)  18 sigma bonds and 2 pi-bonds

B)  16 sigma bonds and 1 pi-bond

C)  9 sigma bonds and 2 pi-bonds

D)  9 sigma bonds and 1 pi-bond

Correct Answer: A

Solution :

                The enolic form of ethyl acetoacetate has 16 single bonds i.e. 16 \[\sigma \]-bonds and 2 double bonds i.e. 2 \[\sigma \]-bonds and 2 \[\pi \]-bonds. Hence, the given structure has 18 \[\sigma \]-bonds and 2\[\pi \]-bonds.