Acetyl acetone

Acetylacetone, also known as 2,4-pentanedione, is a colorless liquid with a slightly sweet odor. It's a simple β-diketone and is used in various applications due to its ability to form chelates with metal ions. 

In chemistry, acetylacetone is often employed as a ligand in coordination chemistry, where it forms complexes with metal ions. This property makes it useful in synthesizing metal-organic frameworks and catalysts. It's also used as a solvent and in the production of pharmaceuticals and agrochemicals. 

In addition to its industrial and scientific uses, acetylacetone can be found in some household products and is sometimes used in flavoring and fragrance applications due to its pleasant smell.