Franz Hein

Franz Hein
Born (1892-06-30)30 June 1892
Grötzingen, Germany
Died 26 February 1976(1976-02-26) (aged 83)
Radebeul, Germany
Nationality German
Alma mater University of Leipzig
Doctoral advisor Arthur Rudolf Hantzsch

Franz Hein (30 June 1892 – 26 February 1976) was a German scientist and artist.

History

Franz Hein was born in Grötzingen (Baden), Germany. His high school years were spent in Leipzig, as well as, his college years at the University of Leipzig. He completed his Ph.D. in 1917 on optical studies of bismuth and triphenylmethane derivatives. Hein made Assistant at the University and in 1920 Oberassistent. He continued working on his Habilitation becoming a professor in 1923.[1] With the completion of his Habilitation, Hein went to work on organometallic system electrochemistry.[2]

In 1933 Hein signed the Loyalty Oath of German Professors to Adolf Hitler and the National Socialist State.

From 1941 to 1965, he worked on main-group-metal derivatives of metal carbonyls.[3] After 1942, Hein moved from Leipzig to the Friedrich Schiller University of Jena where he became the Director of the Institute for Inorganic Chemistry. War came in March 1945 and the University was destroyed. Hein came back to help rebuild towards the end of 1946. Until his retirement, he held a position as a chair in inorganic chemistry until 1959.

Phenylchromium compounds

With the reaction of anhydrous chromium(III) chloride (CrCl3) and phenylmagnesium bromide (C6H5MgBr), Hein created a mixture of compounds. He was able to produce what he called phenylmagnesium salts. Hein denoted them as: (C6H5)5CrX,[4] (C6H5)4CrX,[5] and (C6H5)3CrX.[6] However, it was later found that the correct structures were of sandwich compound type complexes and based on biphenyl not phenyl. The discovery of ferrocene and the research done by Zeiss, Tsutsui, and others lead to this structure determination.

See also

References

  1. ↑ D. Seyferth (2002). "Bis(benzene)chromium. 1. Franz Hein at the University of Leipzig and Harold Zeiss and Minoru Tsutsui at Yale". Organometallics 21 (8): 1520–1530. doi:10.1021/om0201056.
  2. ↑ (a) Hein, F. Z. Elektrochem. 1922, 28, 469. (b) Hein, F.; Wagler, K.; Segitz, F. A.; Petzschner, E. Z. Anorg. Allg. Chem. 1924, 141, 161. (c) Hein, F.; Meininger, H. Z. Anorg. Allg. Chem. 1925, 145, 95. (d) Hein, F.; Segitz, F. A. Z. Anorg. Allg. Chem. 1926, 158, 153. (e) Hein, F.; Schramm, H. Z. Phys. Chem. 1930, 149, 408. (f) Hein, F.; Schramm, H. Z. Phys. Chem. 1930, 151, 234. (g) Hein, F.; Pauling, H. Z. Elektrochem. 1932, 38, 25. (h) Hein, F.; Pauling, H. Z. Phys. Chem. 1933, 165, 338.
  3. ↑ (a) Hein, F.; Pobloth, H. Z. Anorg. Allg. Chem. 1941, 248, 84. (b) Hein, F.; Heuser, E. Z. Anorg. Allg. Chem. 1942, 249, 293. (c) Hein, F.; Heuser, E. Z. Anorg. Allg. Chem. 1947, 254, 138. (d) Hein, F.; Heuser, E. Z. Anorg. Allg. Chem. 1947, 255, 125. (e) Hein, F.; Scheiter, H. Z. Anorg. Allg. Chem. 1949, 259, 183. (f) Hein, F.; Kleinert, P.; Jehn, W. Naturwissenschaften 1957, 44, 34. (g) Hein, F.; Jehn, W. Liebigs Ann. Chem. 1965, 684, 4.
  4. ↑ Hein, F. Ber. Dtsch. Chem. Ges. 1919, 52, 192.
  5. ↑ F. A. Cotton (1955). "Alkyls And Aryls of Transition Metals". Chem. Rev. 55 (3): 551–594. doi:10.1021/cr50003a003.
  6. ↑ Oesper, R.E. J. Chem. Educ. 1953, 30, 315.
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