Related Experiment Video
Updated: Jan 4, 2026
Preparation and Reactivity of a Triphosphenium Bromide Salt: A Convenient and Stable Source of PhosphorusI
Published on: November 22, 2016
Structural characterization of potassium salts of the decamethylmanganocene anion Cp*2Mn
Moritz Malischewski1, Konrad Seppelt1
1Freie Universität Berlin, Institut für Chemie und Biochemie, Institut für Anorganische Chemie, Fabeckstraße 34-36, 14195 Berlin, Germany. moritz.malischewski@fu-berlin.de.
Abstract:
For the first time the crystal structure of a permethylated metallocene anion has been obtained. The 17 valence electron complex decamethylmanganocene Cp*2Mn is reduced by molten potassium in THF to its extremely air-sensitive anion [Cp*2Mn]-. The potassium salt [K(THF)2]+[Cp*2Mn]- crystallizes upon cooling from hot THF and forms infinite polymeric chains exhibiting strong KC contacts. In the presence of 18-crown-6 the polymeric structure is broken up. Crystals of [K(18-crown-6)(THF)2]+[Cp*2Mn]- were obtained upon slow cooling from THF to -80 °C displaying well separated cations and anions.
More Related Videos
Related Concept Videos
03:26Electron Configuration of Multielectron Atoms
02:42Valence Bond Theory
02:21Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate
03:02Colors 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...
02:42Ionic Crystal Structures
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
02:34Structural 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...