The Knölker complex is an organoiron compound, which is a catalyst for

transfer hydrogenation In chemistry, transfer hydrogenation is a chemical reaction involving the addition of hydrogen to a compound from a source other than molecular . It is applied in laboratory and industrial organic synthesis to saturate organic compounds and re ...

. The complex features an hydroxy

cyclopentadienyl Cyclopentadienyl can refer to * Cyclopentadienyl anion, or cyclopentadienide, ** Cyclopentadienyl ligand * Cyclopentadienyl radical, • * Cyclopentadienyl cation, See also * Pentadienyl {{Chemistry index ...

ligand bound to an Fe(CO)₂H centre. It is generated by the corresponding cyclopentadienone tricarbonyl by treatment with base followed by acidification. It is named for The compound is related to the

organoruthenium compound Organoruthenium chemistry is the chemistry of organometallic compounds containing a carbon to ruthenium chemical bond. Several organoruthenium catalysts are of commercial interest and organoruthenium compounds have been considered for cancer therapy ...

called Shvo's complex, a hydroxycyclopentadienyl derivative that also functions as a catalyst for

hydrogenation Hydrogenation is a chemical reaction between molecular hydrogen (H2) and another compound or element, usually in the presence of a catalyst such as nickel, palladium or platinum. The process is commonly employed to redox, reduce or Saturated ...

References

{{reflist Organoiron compounds Carbonyl complexes Hydrogenation catalysts Trimethylsilyl compounds Metal hydrides Cyclopentadienyl complexes Half sandwich compounds Iron(II) compounds