Iron Derivatives of Five-membered Carbon-Nitrogen Heterocycles

✍ Scribed by Prof. Dr. F. Seel; Dipl.-Chem. V. Sperber

• Publisher: John Wiley and Sons
• Year: 1968
• Tongue: English
• Weight: 153 KB
• Volume: 7
• Category: Article
• ISSN: 0044-8249
• DOI: 10.1002/anie.196800701

✦ Synopsis

By treating pyrazole ( I ) , imidazole (2), and 1,2,4-triazole (3) with penta-or tetra-carbonyliron, mercury tetracarbonylferrate(rI), ferrocene, or dicarbonylcyclopentadienyliron in the presence or absence of a solvent (benzene, toluene, or mesitylene) we have been able to prepare the almost colorless iron(I1) derivatives of these nitrogen-heterocycles, namely, Fe(N2C3H3)2 from ( I ) , Fe(N~C3H3)2.0.5 N2C3H4 from (2), and Fe(N3CzHz)z from (3). In the case of imidazole, the synthesis can be effected even with iron powder. In the reaction of dicarbonylcyclopentadienyliron, cyclopentadiene and cyclopentene are by-products;