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.[1][page needed] 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 is a commercially useful antiknock compound.
CpCo(CO)2 is a catalyst for the synthesis of pyridines.
(C4H4)Fe(CO)3.
CpFe(CO)2I is an example of a piano stool complex with two different monodentate ligands.
The diruthenium of cymene is readily cleaved by ligands to give monoRu half-sandwich derivatives.
Cycloheptatriene molybdenum tricarbonyl
Cp2V2(CO)5 featuring a pair of semi-bridging CO ligands.[2]
^Elschenbroich, Christoph (2006-03-10). Organometallics. Wiley. ISBN 978-3-527-29390-2. OCLC 1004583759.
^Huffman, J. C.; Lewis, L. N.; Caulton, K. G. (1980). "A donor semibridge? Molecular structures of dicyclopentadienyldivanadiumtetracarbonyltriphenylphosphine and dicyclopentadienyldivanadiumpentacarbonyl". Inorganic Chemistry. 19 (9): 2755–2762. doi:10.1021/ic50211a052.
and 19 Related for: Half sandwich compound information
Halfsandwichcompounds, also known as piano stool complexes, are organometallic complexes that feature a cyclic polyhapto ligand bound to an MLn center...
In organometallic chemistry, a sandwichcompound is a chemical compound featuring a metal bound by haptic, covalent bonds to two arene (ring) ligands....
3,5-triaza-7-phosphaadamantane (PTA) forming an organoruthenium half-sandwichcompound. Other related ruthenium anti-cancer drugs include NAMI-A, KP1019...
complexes can also be classified by type: Parallel Multi-decker Half-sandwichcompound Bent metallocene or tilted More than two Cp ligands Three main routes...
(described below). In solution, Cp2Fe2(CO)4 can be considered a dimeric half-sandwich complex. It exists in three isomeric forms: cis, trans, and an unbridged...
organomolybdenum compound with the formula (C7H8)Mo(CO)3. It is a red-orange solid that is soluble in nonpolar organic solvents. The compound has no practical...
In chemistry, decomplexation refers to the removal of a ligand from a coordination complex. Decomplexation is of particular interest when the ligand has...
cooling, can lead to catastrophic thermal runaway. MMT is a so-called half-sandwich complex, or more specifically a "piano-stool" complex (since the three...
uranium borohydride is the half-sandwichcompound (COT)U(BH4)2 discovered in 1983 by the group of M.J. Ephritikhine. Compounds of this type react in many...
dicarbonyl is an organocobalt compound with formula (C5H5)Co(CO)2, abbreviated CpCo(CO)2. It is an example of a half-sandwich complex. It is a dark red air...
Cyclopentadienyltungsten tricarbonyl dimer is the organotungsten compound with the formula Cp2W2(CO)6, where Cp is C5H5. A dark red crystalline solid,...
Cyclopentadienylmolybdenum tricarbonyl dimer is the chemical compound with the formula Cp2Mo2(CO)6, where Cp is C5H5. A dark red solid, it has been the...
conducted under an atmosphere of carbon monoxide. MMT is a so-called half-sandwichcompound, or more specifically a piano-stool complex (since the three CO...
Cyclopentadienyl nickel nitrosyl is an organonickel compound with the formula (C5H5)NiNO. It is a diamagnetic, volatile, relatively air-stable red liquid...
ligands. For example, the Cp manganese tricarbonyl complex is a halfsandwichcompound, with one face of the Cp ligand binding to the metal atom. The tricarbonyl...
Cyclobutadieneiron tricarbonyl is an organoiron compound with the formula Fe(C4H4)(CO)3. It is a yellow oil that is soluble in organic solvents. It has...
Co(cyclooctadiene)(cyclooctenyl), a synthetically versatile reagent. The half-sandwichcompounds of the type CpCoL2 have been well investigated (L = CO, alkene)...
"seat" and three other ligands are "legs". Such compounds are members of the half-sandwich family of compounds, which is a subgroup of the metallocenes. X-ray...
reduction to Rh(I). Cyclopentadienyl complexes of rhodium include the half-sandwichcompound pentamethylcyclopentadienyl rhodium dichloride dimer. Strong donor...
Global Information
MMT is a commercially useful antiknock compound.
CpCo(CO)2 is a catalyst for the synthesis of pyridines.
(C4H4)Fe(CO)3.
CpFe(CO)2I is an example of a piano stool complex with two different monodentate ligands.
The diruthenium of cymene is readily cleaved by ligands to give monoRu half-sandwich derivatives.
Cycloheptatriene molybdenum tricarbonyl![Cp2V2(CO)5 featuring a pair of semi-bridging CO ligands.[2]](//upload.wikimedia.org/wikipedia/commons/thumb/7/74/CPPCDV01.png/120px-CPPCDV01.png)
Cp2V2(CO)5 featuring a pair of semi-bridging CO ligands.[2]
![Cp2V2(CO)5 featuring a pair of semi-bridging CO ligands.[2]](http://upload.wikimedia.org/wikipedia/commons/thumb/7/74/CPPCDV01.png/120px-CPPCDV01.png)