Carl Theodor Liebermann (23 February 1842 – 28 December 1914) was a German chemist and student of Adolf von Baeyer.

Liebermann first studied at the University of Heidelberg where Robert Wilhelm Bunsen was teaching.

He then joined the group of Adolf von Baeyer at the University of Berlin where he received his PhD in 1865.

[1][2] In 1826, the French chemist Pierre Jean Robiquet had isolated from the root of a plant, madder, and defined the structure of, alizarin, a remarkable red dye.

The synthesis is a chlorination or bromination of anthracene with a subsequent oxidation forming the alizarin.