Acac

ACAC is an acronym that can refer to several different terms across chemistry and athletics, among other uses. In chemistry, ACAC most often denotes acetylacetonate, the dianion derived from 2,4-pentanedione. The acac ligand is a classic bidentate donor that coordinates through two oxygen atoms to a metal center, forming stable metal complexes. The ligand is widely used in inorganic and organometallic chemistry to stabilize species in various oxidation states and to influence reactivity and stereochemistry in catalysis and materials synthesis. In its common shorthand form, the ligand is written as acac−, and adducts are often abbreviated as [M(acac)2], for example, though many structural variations exist.

In sports and education, ACAC most commonly refers to the Alberta Colleges Athletic Conference, a Canadian intercollegiate athletic association for post-secondary institutions in Alberta. The conference organizes competitive play across several sports and serves as a regional platform for college-level athletics.

Other uses of ACAC exist in different sectors and may denote organizational acronyms or program names specific to a country or institution. Because the acronym lacks a single universal meaning, the intended reference is typically determined by the surrounding context.