Related Experiment Video
Updated: Jun 28, 2026

Preparation of 6-aminocyclohepta-2,4-dien-1-one Derivatives via Tricarbonyl(tropone)iron
Published on: August 12, 2019
A compound of iron(II), phenylbiguanide and cyanide
J M Calatayud1, F B Reig, M C Alvarez-Coque
1Departamento de Química Analítica, Facultad de Ciencias Químicas, Universidad de Valencia, Valencia, Spain.
Abstract:
A spectrophotometric investigation has been made of the red water-soluble complex of phenylbiguanide with iron(II) in cyanide medium. The complex is found to have maximum absorbance at 520 nm. Use of the extension of the Asmus method to M(s)L(m)L'(n) complexes and of Koch and Ackermann's method suggests the formula [Fc(phenylbiguanide)(CN(4))](2-) for the red compound. Anlytical procedures for the detection of iron and cyanide are proposed.
Related Concept Videos
Phase II Reactions: Miscellaneous Conjugation Reactions
A key example involves the conjugation of cyanide ions, which impair cellular respiration and alter hemoglobin into non-oxygen-carrying cyanmethemoglobin. To neutralize this threat, a sulfur atom from thiosulphate is transferred to the cyanide ion, catalyzed by the enzyme rhodanese, resulting in an inactive compound called thiocyanate. The production of...
Formation of Complex Ions
Aldehydes and Ketones with HCN: Cyanohydrin Formation Overview
Aryldiazonium Salts to Azo Dyes: Diazo Coupling
Metal-Ligand Bonds
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
Antiprotozoal Agents
![[(DPEPhos)(bcp)Cu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F59739.jpg&w=3840&q=50)
