Question

Use a sheet of paper to answer the following question. Take a picture of your answers and attach to this assignment. Draw the structure of 2,2,4,4-tetramethyl-3-pentanone and explain why it does not form an enol tautomer Explain why cyclohexa-2,4-dien-1-one (also called 2,4-cyclohexadienone) exists exclusively in the enol form

Answer 1

Step-by-step explanation:

Structure of the 2,2,4,4-tetramethyl-3-pentanone is give in the attachment

In 2,2,4,4-tetramethyl-3-pentanone, no alpha hydrogen is present, therefore, enol form is not possible and hence, exist only in keto form.

Explanation for existence of cyclohexa-2,4-diene-1-one only in enol form:

keto form of cyclohexa-2,4-diene-1-one not aromatic and hence less stable.

Whereas enol form it is aromatic which makes it highly stable. that's why cyclohexa-2,4-diene-1-one exists only in enol form.