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Names | |||
---|---|---|---|
IUPAC name
Hexacarbonylmolybdenum(0)
| |||
Systematic IUPAC name
Hexacarbonylmolybdenum
[1] | |||
Identifiers | |||
3D model (
JSmol)
|
|||
ChEBI | |||
ChemSpider | |||
ECHA InfoCard | 100.034.271 | ||
EC Number |
| ||
3798, 562210 | |||
MeSH | Hexacarbonylmolybdenum | ||
PubChem
CID
|
|||
UN number | 3466 | ||
CompTox Dashboard (
EPA)
|
|||
| |||
| |||
Properties | |||
C6MoO6 | |||
Molar mass | 264.01 g·mol−1 | ||
Appearance | Vivid, white, translucent crystals | ||
Density | 1.96 g cm−3 | ||
Melting point | 150 °C (302 °F; 423 K) | ||
Boiling point | 156 °C (313 °F; 429 K) | ||
insoluble | |||
Solubility | slightly soluble in THF, diglyme, acetonitrile [2] | ||
Structure | |||
Orthogonal | |||
Octahedral | |||
0 D | |||
Thermochemistry | |||
Std enthalpy of
formation (ΔfH⦵298) |
−989.1 kJ mol−1 | ||
Std enthalpy of
combustion (ΔcH⦵298) |
−2123.4 kJ mol−1 | ||
Hazards | |||
GHS labelling: | |||
Danger | |||
H300, H310, H315, H319, H330, H413 | |||
P261, P271, P280, P304+P340+P311, P405, P501 | |||
NFPA 704 (fire diamond) | |||
Safety data sheet (SDS) | External MSDS | ||
Related compounds | |||
Related compounds
|
Chromium hexacarbonyl | ||
Except where otherwise noted, data are given for materials in their
standard state (at 25 °C [77 °F], 100 kPa).
|
Molybdenum hexacarbonyl (also called molybdenum carbonyl) is the chemical compound with the formula Mo(CO)6. This colorless solid, like its chromium, tungsten, and seaborgium analogues, is noteworthy as a volatile, air-stable derivative of a metal in its zero oxidation state.
Mo(CO)6 adopts an octahedral geometry consisting of six rod-like CO ligands radiating from the central Mo atom. A recurring minor debate in some chemical circles concerns the definition of an " organometallic" compound. Usually, organometallic indicates the presence of a metal directly bonded via a M–C bond to an organic fragment, which must in turn have a C–H bond.
Like many metal carbonyls, Mo(CO)6 is generally prepared by "reductive carbonylation", which involves reduction of a metal halide with under an atmosphere of carbon monoxide. As described in a 2023 survey of methods "most cost-effective routes for the synthesis of group 6 hexacarbonyls are based on the reduction of the metal chlorides (CrCl3, MoCl5 or WCl6) with magnesium, zinc or aluminium powders... under CO pressures". [4]
Mo(CO)6 has been detected in landfills and sewage plants, the reducing, anaerobic environment being conducive to formation of Mo(CO)6. [5]
Molybdenum hexacarbonyl is a popular reagent in academic research. [6]
One or more CO ligands can be displaced by other ligands. [7] Mo(CO)6, [Mo(CO)3(MeCN)3], and related derivatives are employed as catalysts in organic synthesis for example, alkyne metathesis and the Pauson–Khand reaction.
Mo(CO)6 reacts with 2,2′-bipyridine to afford Mo(CO)4(bipy). UV-photolysis of a THF solution of Mo(CO)6 gives Mo(CO)5(THF).
The thermal reaction of Mo(CO)6 with piperidine affords Mo(CO)4(piperidine)2. The two piperidine ligands in this yellow-colored compound are labile, which allows other ligands to be introduced under mild conditions. For instance, the reaction of [Mo(CO)4(piperidine)2] with triphenyl phosphine in boiling dichloromethane (b.p. ca. 40 °C) gives cis-[Mo(CO)4(PPh3)2]. This cis- complex isomerizes in toluene to trans-[Mo(CO)4(PPh3)2]. [8]
Mo(CO)6 also can be converted to its tris(acetonitrile) derivative. The compound serves as a source of "Mo(CO)3". For instance treatment with allyl chloride gives [MoCl(allyl)(CO)2(MeCN)2], whereas treatment with KTp and sodium cyclopentadienide gives [MoTp(CO)3− and [MoCp(CO)3− anions, respectively. These anions react with a variety of electrophiles. [9] A related source of Mo(CO)3 is cycloheptatrienemolybdenum tricarbonyl.
Molybdenum hexacarbonyl is widely used in electron beam-induced deposition technique - it is easily vaporized and decomposed by the electron beam providing a convenient source of molybdenum atoms. [10]
Like all metal carbonyls, Mo(CO)6 is a dangerous source of volatile metal as well as CO.
| |||
Names | |||
---|---|---|---|
IUPAC name
Hexacarbonylmolybdenum(0)
| |||
Systematic IUPAC name
Hexacarbonylmolybdenum
[1] | |||
Identifiers | |||
3D model (
JSmol)
|
|||
ChEBI | |||
ChemSpider | |||
ECHA InfoCard | 100.034.271 | ||
EC Number |
| ||
3798, 562210 | |||
MeSH | Hexacarbonylmolybdenum | ||
PubChem
CID
|
|||
UN number | 3466 | ||
CompTox Dashboard (
EPA)
|
|||
| |||
| |||
Properties | |||
C6MoO6 | |||
Molar mass | 264.01 g·mol−1 | ||
Appearance | Vivid, white, translucent crystals | ||
Density | 1.96 g cm−3 | ||
Melting point | 150 °C (302 °F; 423 K) | ||
Boiling point | 156 °C (313 °F; 429 K) | ||
insoluble | |||
Solubility | slightly soluble in THF, diglyme, acetonitrile [2] | ||
Structure | |||
Orthogonal | |||
Octahedral | |||
0 D | |||
Thermochemistry | |||
Std enthalpy of
formation (ΔfH⦵298) |
−989.1 kJ mol−1 | ||
Std enthalpy of
combustion (ΔcH⦵298) |
−2123.4 kJ mol−1 | ||
Hazards | |||
GHS labelling: | |||
Danger | |||
H300, H310, H315, H319, H330, H413 | |||
P261, P271, P280, P304+P340+P311, P405, P501 | |||
NFPA 704 (fire diamond) | |||
Safety data sheet (SDS) | External MSDS | ||
Related compounds | |||
Related compounds
|
Chromium hexacarbonyl | ||
Except where otherwise noted, data are given for materials in their
standard state (at 25 °C [77 °F], 100 kPa).
|
Molybdenum hexacarbonyl (also called molybdenum carbonyl) is the chemical compound with the formula Mo(CO)6. This colorless solid, like its chromium, tungsten, and seaborgium analogues, is noteworthy as a volatile, air-stable derivative of a metal in its zero oxidation state.
Mo(CO)6 adopts an octahedral geometry consisting of six rod-like CO ligands radiating from the central Mo atom. A recurring minor debate in some chemical circles concerns the definition of an " organometallic" compound. Usually, organometallic indicates the presence of a metal directly bonded via a M–C bond to an organic fragment, which must in turn have a C–H bond.
Like many metal carbonyls, Mo(CO)6 is generally prepared by "reductive carbonylation", which involves reduction of a metal halide with under an atmosphere of carbon monoxide. As described in a 2023 survey of methods "most cost-effective routes for the synthesis of group 6 hexacarbonyls are based on the reduction of the metal chlorides (CrCl3, MoCl5 or WCl6) with magnesium, zinc or aluminium powders... under CO pressures". [4]
Mo(CO)6 has been detected in landfills and sewage plants, the reducing, anaerobic environment being conducive to formation of Mo(CO)6. [5]
Molybdenum hexacarbonyl is a popular reagent in academic research. [6]
One or more CO ligands can be displaced by other ligands. [7] Mo(CO)6, [Mo(CO)3(MeCN)3], and related derivatives are employed as catalysts in organic synthesis for example, alkyne metathesis and the Pauson–Khand reaction.
Mo(CO)6 reacts with 2,2′-bipyridine to afford Mo(CO)4(bipy). UV-photolysis of a THF solution of Mo(CO)6 gives Mo(CO)5(THF).
The thermal reaction of Mo(CO)6 with piperidine affords Mo(CO)4(piperidine)2. The two piperidine ligands in this yellow-colored compound are labile, which allows other ligands to be introduced under mild conditions. For instance, the reaction of [Mo(CO)4(piperidine)2] with triphenyl phosphine in boiling dichloromethane (b.p. ca. 40 °C) gives cis-[Mo(CO)4(PPh3)2]. This cis- complex isomerizes in toluene to trans-[Mo(CO)4(PPh3)2]. [8]
Mo(CO)6 also can be converted to its tris(acetonitrile) derivative. The compound serves as a source of "Mo(CO)3". For instance treatment with allyl chloride gives [MoCl(allyl)(CO)2(MeCN)2], whereas treatment with KTp and sodium cyclopentadienide gives [MoTp(CO)3− and [MoCp(CO)3− anions, respectively. These anions react with a variety of electrophiles. [9] A related source of Mo(CO)3 is cycloheptatrienemolybdenum tricarbonyl.
Molybdenum hexacarbonyl is widely used in electron beam-induced deposition technique - it is easily vaporized and decomposed by the electron beam providing a convenient source of molybdenum atoms. [10]
Like all metal carbonyls, Mo(CO)6 is a dangerous source of volatile metal as well as CO.