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Question:

The enolic form of ethyl acetoacetate as below has:

18 sigma bonds and 2 pi -bonds

16 sigma bonds and 1 pi -bonds

9 sigma bonds and 2 pi -bonds

9 sigma bonds and 1 pi -bonds

Solution:

The enolic form of ethyl acetoacetate has 18 sigma bonds and 2 pi -bonds.These are as shown below.