Are you an EPFL student looking for a semester project?
Work with us on data science and visualisation projects, and deploy your project as an app on top of Graph Search.
Concept
Half sandwich compound
Summary
Half sandwich compounds, also known as piano stool complexes, are organometallic complexes that feature a cyclic polyhapto ligand bound to an MLn center, where L is a unidentate ligand. Thousands of such complexes are known. Well-known examples include cyclobutadieneiron tricarbonyl and (C5H5)TiCl3. Commercially useful examples include (C5H5)Co(CO)2, which is used in the synthesis of substituted pyridines, and methylcyclopentadienyl manganese tricarbonyl, an antiknock agent in petrol.
MMT-2D-skeletal.png|MMT is a commercially useful antiknock compound.
Cpco(CO)2.png|CpCo(CO)2 is a catalyst for the synthesis of pyridines.
Cyclobutadienyl-iron-tricarbonyl-from-xtal-3D-balls.png|(C4H4)Fe(CO)3.
Cp2Fe(CO)2I-2D-skeletal.png|[[Cyclopentadienyliron dicarbonyl iodide|CpFe(CO)2I]] is an example of a piano stool complex with two different monodentate ligands.
RuCymCl2.png|The diruthenium of [[cymene]] is readily cleaved by ligands to give monoRu half-sandwich derivatives.
CHTMo(CO)3.png|[[Cycloheptatrienemolybdenum tricarbonyl|Cycloheptatriene molybdenum tricarbonyl]]
CPPCDV01.png|Cp2V2(CO)5 featuring a pair of semi-bridging CO ligands.{{cite journal|last1=Huffman |first1=J. C. |last2=Lewis |first2=L. N. |last3=Caulton |first3=K. G.|title=A donor semibridge? Molecular structures of dicyclopentadienyldivanadiumtetracarbonyltriphenylphosphine and dicyclopentadienyldivanadiumpentacarbonyl|journal=Inorganic Chemistry|year=1980|volume=19|issue=9|pages=2755–2762|doi=10.1021/ic50211a052}}
Half sandwich complexes containing cyclopentadienyl ligands are common. Well studied examples include (η5-C5H5)V(CO)4, (η5-C5H5)Cr(CO)3H, (η5-CH3C5H4)Mn(CO)3, (η5-C5H5)Cr(CO)3H, [(η5-C5H5)Fe(CO)3]+, (η5-C5H5)V(CO)4I, and (η5-C5H5)Ru(NCMe). (η5-C5H5)Co(CO)2 is a two-legged piano stool complex. Bulky cyclopentadienyl ligands such as 1,2,4-C5H2(tert-Bu)3− form unusual half-sandwich complexes.
Official source
About this result
This page is automatically generated and may contain information that is not correct, complete, up-to-date, or relevant to your search query. The same applies to every other page on this website. Please make sure to verify the information with EPFL's official sources.