Klaus Hafner

Klaus Hafner (2008)

Klaus Hafner (born December 10, 1927 in Potsdam ) is a German chemist .

Life

Klaus Hafner studied chemistry from 1946 to 1951 at the Philipps University of Marburg . In 1951 he was in Hans Meerwein with a thesis on the diazo of dinitroanilines and 2,4,6-Trinitroanilins doctorate . He completed his habilitation in 1955 at the Max Planck Institute for Coal Research in Mülheim an der Ruhr with the later Nobel Prize winner Karl Ziegler . In 1955 he discovered the Ziegler-Hafner synthesis for the simplified representation of azulenes .

From 1962 to 1964 Hafner was a professor at the Ludwig Maximilians University in Munich , and since 1965 he has been a full professor at the Technical University of Darmstadt and director of the Institute for Organic Chemistry. In 1996 he retired .

Act

He specializes in conjugated π-electron systems such as azulenes , fulvenes , Heptalenes and their metal complexes.

Hafner was editor of the chemical journal " Liebigs Annalen " for many years . He was also co-editor of the “ Chemical Reports ” and the “ Topics in Current Chemistry ” series.

In the Society of German Chemists he was a. a. responsible as chairman of the court of honor. Further voluntary work in the German Research Foundation (DFG), as a consultant to the Dr. Otto Röhm-Gedächtnisstiftung and the Minerva Foundation as well as a liaison professor of the Association of the Chemical Industry and the selection committee of the Alexander von Humboldt Foundation bear witness to the broad influence that Hafner has.

In 1980, his work was honored with the Adolf von Baeyer medal from the Society of German Chemists . He is an honorary professor at the East China University in Shanghai and holder of the Carus Prize of the city of Schweinfurt .

In 1986 he was elected to the German Academy of Sciences Leopoldina .

Works (selection)

Hafner's scientific work comprises around 200 publications, most of which can be assigned to preparative organic chemistry.

• K. Ziegler and K. Hafner: A rational synthesis of the azulene. In: Angewandte Chemie . Volume 67, 1955, p. 301.
• K. Hafner: New Azulene Syntheses. In: Angewandte Chemie. Volume 67, 1955, p. 302.
• K. Hafner and H. Weldes: Introduction of substituents in the 7-ring of azulene with the help of organometallic compounds. In: Angewandte Chemie. Volume 67, 1955, p. 302.
• K. Hafner: Recent results in azulene chemistry. In: Angewandte Chemie. Volume 70, 1958, pp. 419-430.
• K. Hafner, KH Häfner, C. König, M. Kreuder, G. Ploß, G. Schulz, E. Sturm and KH Vöpel: Fulvene as isomers of benzoid compounds. In: Angewandte Chemie. Volume 75, 1963, 35-36; Angewandte Chemie International Edition in English. Volume 2, 1963, p. 123.
• K. Hafner and HU Süss: 1.3.5-Tri-tert-butyl-pentalen - A stable planar 8p-electron system. In: Angewandte Chemie. Volume 85, 1973, pp. 626-628; Angewandte Chemie International Edition in English. Volume 12, 1973, pp. 575-577.
• K. Hafner, H. Diehl and HU Süss: Cycloaddition Reactions of Pentalene and Azulene: A Simple Heptalen-Synthesis. In: Angewandte Chemie. Volume 88, 1976, pp. 121-123; Angewandte Chemie International Edition in English. Volume 15, 1976, pp. 104-106.
• LT Scott, MD Rozeboom, KN Houk , T. Fukanaga, HJ Lindner and K. Hafner: The Quinones of Azulene. A Theoretical Prognosis. In: Journal of the American Chemical Society . Volume 102, 1980, pp. 5169-5176.
• VM Hallmark, S. Chiang, K.-P. Meinhardt and K. Hafner: Observation and Calculation of Internal Structure in Scanning Tunneling Microscopy Images of Related Molecules. In: Physical Review Letters . Volume 70, 1993, pp. 3740-3743.
• AHM Elwahy and K. Hafner: Cyclooligomerization of Mono- and Diazulenylethynes Catalyzed by Transition Metal Complexes. In: European Journal of Organic Chemistry . 2010, pp. 265-274.

Individual evidence

1. ↑ Louis Fieser, Mary Fieser: Organic chemistry. 2nd edition, Verlag Chemie, Weinheim 1972, ISBN 3-527-25075-1 , p. 1110.

Web links

• Website from Klaus Hafner