Write the complete mechanism for the aldol condensation of acetophenone catalyzed by an acid.

How can the following compound be prepared using the provided starting material?

Write the aldol addition product of the compound shown below.

Determine I — IV in the sequence below given that I shows three singlets in its ¹H NMR spectrum with the integration ratio 9 : 2 : 9.

Identify the product(s) that is/are expected from aldol condensation followed by dehydration of the aldehyde 3-methylbutanal.

The following compound can be created by performing aldol condensations followed by other reactions. Determine the compounds required for the condensation reaction.

The following compound can be created by performing aldol condensations followed by other reactions. Determine the compounds required for the condensation reaction.