Leopold Horner

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Leopold Horner
Born (1911-08-24)August 24, 1911
Kehl, German Empire
Died October 5, 2005(2005-10-05) (aged 94)
Mainz, Germany
Nationality German
Alma mater University of Munich
Known for Horner-Wadsworth-Emmons reaction
Awards Liebig Medal (1973)
Cothenius Medal (de) (2001)
Scientific career
Institutions University of Munich,
University of Mainz
Doctoral advisor Heinrich Wieland

Leopold Horner (August 24, 1911 – October 5, 2005) was a German chemist who published a modified Wittig reaction using phosphonate-stabilized carbanions now called the Horner–Wadsworth–Emmons reaction (HWE reaction) or Horner-Wittig reaction.


Horner started studying chemistry at the University of Heidelberg and later with Heinrich Wieland at the University of Munich. After he received his Ph.D and his habilitation he worked at the Polymer Research Institute in Frankfurt. In 1953 he became professor at the University of Mainz.