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Hans Freiherr [a] von Pechmann (1 April 1850 – 19 April 1902) was a German chemist, renowned for his discovery of diazomethane in 1894. [ 1 ] [ 2 ] Pechmann condensation [ 3 ] [ 4 ] and Pechmann pyrazole synthesis . [ 5 ]
B. Helmut Barbe; Hans-Christian Bartel; Richard Barth; Carola Bauckholt; Friedrich Baumfelder; Jürg Baur; Waldemar von Baußnern; Max Beckschäfer; Siegfried Behrend
1898: Synthesis of polyethylene, the most common plastic, by Hans von Pechmann [160] 1898: First synthesis of purine by Emil Fischer. He had also coined the word in 1884. [161] Early 20th century: Schlenk flask by Wilhelm Schlenk [162] 1900s: Haber process by Carl Bosch and Fritz Haber [134] 1902: Ostwald process by Wilhelm Ostwald [163]
Music; Philosophy; Science; 1898 in science; 1897. ... Polyethylene is first synthesized by German chemist Hans von Pechmann. ... Arthur R. von Hippel ...
Hans Helfritz (1902–1995) Barbara Heller (born 1936) Sigmund Hemmel (c. 1520–1565) Fanny Hensel (1805–1847) Adolf von Henselt (1814–1889) Hans Werner Henze (1926–2012) Gerda Herrmann (1931–2021) Heinrich Freiherr von Herzogenberg (1843–1900) Hans-Joachim Hespos (1938–2022) Kurt Hessenberg (1908–1994) Moritz Heuzenroeder (1849 ...
Georg Ritter von Trapp, commander of Austrian submarine U5 poses for a portrait; Christopher Plummer as Baron von Trapp in 'The Sound of Music' (1965). Baron Captain Georg von Trapp was the ...
Captured here in Austin, Texas, in 2022, Robert Plant and Alison Krauss perform on their Raising the Roof Tour. Plant revisits he early years with Led Zeppelin in a new doc, "Becoming Led Zeppelin."
Hans von Pechmann, chemist; Corps Isaria München [218] Elias Peissner, Professor at Union College; Corps Palatia München, Corps Alemannia München; member of Sigma Phi and Phi Beta Kappa Society, fallen in the Battle of Chancellorsville [219]