Related Experiment Video
Updated: Oct 3, 2026

Simple Methods for the Preparation of Non-noble Metal Bulk-electrodes for Electrocatalytic Applications
Published on: June 21, 2017
Charge-Transfer Salts of Octamethylferrocenyl Thioethers and [M(mnt)(2)](-) Complexes (M = Ni, Co, Pt). Synthesis,
Stefan Zürcher1, Volker Gramlich, Dieter von Arx
1Laboratory of Inorganic Chemistry, ETH-Zentrum, Swiss Federal Institute of Technology, CH-8092 Zürich, Switzerland.
Abstract:
The new ferrocene derivatives Fe(eta(5)-C(5)Me(4)SR)(2) (R = Me, 4: R = t-Bu, 5) have been prepared from the corresponding cyclopentadiene and FeCl(2). 5 may be converted to the bis(thiobenzoate) 6, a protected form of dithiol 8. From 6 the octamethyl trithiaferrocenophane 9 may be obtained in good yields. Compounds 4 and 5 are easily oxidized and form paramagnetic salts containing [M(mnt)(2)](-) anions (M = Co, Ni, Pt). The derivatives [Fe(eta(5)-C(5)Me(4)SMe)(2)][Ni(mnt)(2)], 14, [Fe(eta(5)-C(5)Me(4)SMe)(2)][Pt(mnt)(2)], 15, [Fe(eta(5)-C(5)Me(4)SMe)(2)][Co(mnt)(2)], 16, [Fe(eta(5)-C(5)Me(4)St-Bu)(2)][Ni(mnt)(2)], 17, [Fe(eta(5)-C(5)Me(4)St-Bu)(2)][Pt(mnt)(2)], 18, and [Fe(eta(5)-C(5)Me(4)St-Bu)(2)][Co(mnt)(2)], 19, have been prepared and fully characterized. X-ray crystal structural studies of 14 and 16-19 have been carried out. 14 and 16 display stacks of strongly interacting [M(mnt)(2)](-) anions, whereas 19 contains discrete [Co(mnt)(2)] dimers. 17 and 18 are isomorphous and display a typical D(+)A(-)D(+)A(-) structural motif. SQUID susceptibility measurements indicate a weak ferromagnetic ordering at low temperature for these two compounds.
More Related Videos
10:15Solar-Driven Electrochemical Green Fuel Production from CO2 and Water Using Ti3C2Tx MXene-Supported CuZn and NiCo Catalysts
Published on: November 7, 2025
12:30Synthesis of a Thiol Building Block for the Crystallization of a Semiconducting Gyroidal Metal-sulfur Framework
Published on: April 9, 2018
Related Concept Videos
Valence Bond Theory
Formation of Complex Ions
Coordination Compounds and Nomenclature
Colors and Magnetism
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human eye.
Structural Isomerism
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can be...
Crystal Field Theory - Octahedral Complexes
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...