Max Bodenstein

Max Ernst August Bodenstein ( born July 15, 1871 in Magdeburg, † September 3, 1942 in Berlin) was a German physical chemist.

Life

Max Bodenstein was born in Magdeburg on July 15, 1871, the eldest son of the Magdeburg businessman and brewer Franz Bodenstein ( 1834-1885 ) and his first wife Elise Meissner ( 1846-1876 ).

Bodenstein studied from 1889 in Wiesbaden at Fresenius and at the University of Heidelberg, where in 1893 he Victor Meyer with the theme: phil decomposition of Jodwasserstoffes in the heat of the Dr.. nat. received his doctorate. After studies in the fields of organic chemistry at Karl Liebermann at the Technical University of Berlin -Charlottenburg and physical chemistry with Walther Nernst at Göttingen, he habilitated in 1899 at Heidelberg University with the theme: gas reactions in chemical kinetics.

In 1896 he married Marie fog in Heidelberg ( 1862-1944 ), daughter of the lawyer Friedrich fog and Mary Busch. The marriage produced two daughters have emerged: Hilde (* 1897) and Elsbeth (* 1901), later married name Michaelis.

In 1900, Bodenstein went to the physico-chemical Institute of Wilhelm Ostwald at Leipzig University, where in 1904 titular professor before he finally associate professor at Berlin University and head of department was established in 1906 on the physicochemical Institute of Walther Nernst. In 1908 he took up the offer, a full professor at the Technical University of Hannover and Director of the electrochemical Institute to become. In 1923 he returned to Berlin and became successor Walther Nernst on Physicochemical Institute.

Max Bodenstein was an employee in the German Atomic Weight Commission, co-editor of the Journal of Physical Chemistry, Corresponding Member of the Academy of Sciences in Göttingen, in 1925 a full member of the Royal Prussian Academy of Sciences and since 1933 member of the German Academy of Sciences Leopoldina. For his many years of service Bodenstein received in 1936 by the German Chemical Society, August Wilhelm von Hofmann Medal. In addition, he became the Dr. sc H.C. Princeton University and Dr. Ing E. H. appointed.

The grave of Max Bodenstein is located in the Protestant Cemetery Nikolasee in E. field A plaque on the building of the former Physico- Chemical Institute in Bunsenstraße in Berlin-Mitte is reminiscent of the work of Max Bodenstein and Walther Nernst in this house.

Services

Bodenstein is considered the founder of chemical kinetics. Particularly intense, he explored the reaction mechanism of the chlorine oxyhydrogen reaction. With this research, he contributed to the understanding in light- induced chemical chain reactions, thus making a contribution to the photochemistry.

Named after him is the Bodensteinsche Quasistationaritätsprinzip: It is assumed in successive reactions that a reactive intermediate in a quasi- constant ( steady-state ) concentration is present:

A → B → C

[B ] = ~ const. and d [ B] / dt = ~ 0

Reactive intermediates can be, for example: radical, carbenium ions, molecules in the excited state, etc.

Henri Victor wrote in 1902: " M. Bodenstein, to whom I owe a lot of valuable advice, "especially with respect to the kinetic description of the enzyme invertase. In this way, Bodenstein has contributed to early research in enzyme kinetics. According to Henri and a later article by Bodenstein even he has v = VS / ( mS nP ) proposed around 1901 / 02, the enzyme kinetic equation. Henri has corrected the to v = VS / (1 mS nP ) (both written in modern notation, S: substrate concentration, P: product concentration ).

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