The German organic chemist Otto Paul Hermann Diels (1876-1954) discovered a technique of atomic combination which led to the synthesis of an important group of organic compounds.

Hermann Diels was born in Hamburg on Jan. 23, 1876. After studying chemistry at the University of Berlin he was awarded a doctoral degree in 1899. In that year he joined the faculty as assistant professor and became associate professor in 1914. He became professor of chemistry at the University of Kiel in 1916 and held this position until his retirement in 1948.

In his early work at Berlin, Diels discovered carbon suboxide (1906) and investigated its properties. The compound was important because of its high degree of reactivity and because its chemical structure provided important information as to the composition of other oxides of the carbon atom. However, Diels's most important work was done at Kiel, where he was assisted by Kurt Alder. Together they were able...