Karl Reimer

This article describes Karl Reimer (1845–1883), for another chemist (1856–1921) see Carl Ludwig Reimer .

Karl Reimer around 1871

Reimer and Haarmann ca.1878

Obituary 1883 by AW Hofmann

Karl Reimer (born December 25, 1845 in Leipzig , † January 15, 1883 in Berlin ) was a German chemist and industrialist.

Live and act

Reimer was born on December 25, 1845, the son of the bookseller Karl August Reimer (1801-1858) in Leipzig. His father moved the Weidmann bookstore from Leipzig to Berlin in 1854 . Since he died shortly afterwards, Karl Reimer was only able to take his Abitur at the Friedrichs-Gymnasium Berlin in 1865. His start of studies in Göttingen and Greifswald was interrupted by the German War of 1866 . Only after he had recovered from a severe typhoid fever caused by the war was he able to continue studying chemistry in Greifswald, then Heidelberg and finally in Berlin.

At the Friedrich-Wilhelms-Universität Berlin he started his dissertation with AW v. Hofmann on a research area of Eduard Linnemann and the German Chemical Society in Berlin elected him on March 22, 1869 as a student member. The Franco-Prussian War of 1870/71 again hindered more intensive research. Reimer received his doctorate in July 1871 under AW v. Hofmann with a work “ About some derivatives of fermentation butyl alcohol ”.

He then got brief jobs with Theodor Hartig at the Königl. Forstakademie Eberswalde and at AW v. Hofmann at the university. The latter also referred Reimer to the new Berlin chemical factory founded in 1870 by CAF Kahlbaum in Schlesische Strasse . In the spring of 1875, due to the sudden death of Theodor Goldschmidt, he took over the management of his factory for tin preparations at short notice and as a substitute .

In the summer of 1874, Hofmann's brother-in-law F. Tiemann and W. Haarmann founded " Haarmann's Vanillinfabrik " in Holzminden. After Haarmann left Berlin, Tiemann involved Karl Reimer in solving technical problems (oxidation of coniferin) in his company's current vanillin production.

At the end of 1875, Karl Reimer independently developed a new synthesis route to aromatic aldehydes by reacting aqueous phenolate solutions with chloroform ( Reimer's reaction ).

Karl Reimer refrained from conducting his own scientific research into this reaction to F. Tiemann and, in return, was involved in Haarmann's vanillin factory in Holzminden as an equal co-owner in 1876. This “Reimer's reaction” made it possible for the first time to conveniently and cheaply synthesize vanillin by reacting guaiacol with chloroform; Because of the formation of isomeric by-products, this synthetic route could not prevail.

"Reimer's reaction" became generally known as the Reimer-Tiemann reaction through numerous publications by Tiemann . The vanillin factory of the three chemists Tiemann, Haarmann and Reimer was renamed Haarmann & Reimer in 1876 .

Reimer left the company as early as 1881 due to illness and died shortly afterwards in January 1883.

literature

• Eureka vanilla

Individual evidence

1. ^ German Chemical Society of Berlin (membership status): stud. C. Reimer, Berlin when admitted March 22, 1869 and January 1, 1870. - Dr. K. Reimer, Holzminden on December 31, 1880.
2. ↑ In the summer of 1870, AW v. Hofmann an overview of all examinations fragmentary due to the influence of the war from the Berlin university laboratory in Ber. German Chem. Ges. 3 , 755-760 (1870).
3. ^ Wilhelm Kahlbaum (1822–1884) new owner of CAF Kahlbaum
4. ↑ Chem. Zentralbl. 5 , 652 (1874) . - CR Acad. Sci. 79 , 635 (1874) . - Date of foundation August 1, 1874 .
5. ↑ F. Tiemann and C. Reimer, Ueber Zuckervanillinsäure, an acidic glycoside in Ber. German Chem. Ges. 8 , 515-518 (1875). - F. Tiemann, on vanillic acid in Ber. German Chem. Ges. 8 , 509-515 (1875).
6. ↑ K. Reimer, Ueber a new mode of formation of aromatic aldehydes in Ber. German Chem. Ges. 9 , 423-424 (1876).
7. ↑ K. Reimer and F. Tiemann, On the effect of chloroform on alkaline phenolates , On the effect of chloroform on phenols and especially aromatic oxyacids in alkaline solution and On the effect of carbon tetrachloride on phenol in alkaline solution (formation of salicylic acid and paroxybenzoic acid) in Ber. German Chem. Ges. 9 , 824-828, 1268-1278 and 1285-1287 (1876). - On page 1269 "Mr. Reimer II." thanked; These are partial results of the dissertation of Carl Ludwig Reimer , the younger cousin of Karl Reimer. Carl Ludwig was accepted into the German Chemical Society in Berlin on February 28, 1876.
8. ^ Hermann Kolbe, Interesting method for the representation of formylated compounds, experiments by K. Reimer and F. Tiemann in Journal für Praktische Chemie 14 , 328–346 (1876).