An interesting consequence of this isomerization of unsaturated ketones is that 2-substituted cyclopentenones, such as 2-methyl-2-cyclopentenone, can be interconverted with 5-substituted 2-cyclopentenones. The mechanism has three intermediates. Draw the structure of the second intermediate in the conversion of 2-methyl-2-cyclopentenone to 5-methyl-2-cyclopentenone. This intermediate is a neutral compound.