Related Experiment Video
Updated: Mar 14, 2026

Imine Metathesis by Silica-Supported Catalysts Using the Methodology of Surface Organometallic Chemistry
Published on: October 18, 2019
Accessing osmium(VI) nitrido complexes with N-heterocyclic carbene ligands
Joshua Parche1, Robin Sievers1, Tim-Niclas Streit1
1Freie Universität Berlin, Institute of Inorganic Chemistry, Fabeckstr. 34-36, 14195 Berlin, Germany. moritz.malischewski@fu-berlin.de.
None:
The synthesis of the first osmium(VI) nitrido complexes bearing NHC ligands is described. Herein, [NBu4][OsNCl4] is reacted with two equivalents of Cl-IMes NHC to afford the neutral complex [OsN(Cl)3(Cl-IMes)2]. Subsequent ligand substitution reactions selectively replace the chloride ligands while preserving the OsN-NHC core, providing access to a series of stable complexes of the general formula [OsN(X)3(Cl-IMes)2]. These compounds represent the first examples of osmium-NHC complexes in an oxidation state higher than +IV. The ligand exchange reactions enable systematic tuning of the coordination environment and the associated electronic properties.
More Related Videos
10:51The Synthesis, Characterization and Reactivity of a Series of Ruthenium N-triphosPh Complexes
Published on: April 10, 2015
07:30A Direct, Regioselective and Atom-Economical Synthesis of 3-Aroyl-N-hydroxy-5-nitroindoles by Cycloaddition of 4-Nitronitrosobenzene with Alkynones
Published on: January 21, 2020
Related Concept Videos
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...
Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide
ortho–para-Directing Activators: –CH3, –OH, –⁠NH2, –OCH3
Nitrosation of Enols
Valence Bond Theory
Coordination Compounds and Nomenclature