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CAS No.: | 13007-92-6 |
---|---|
Name: | Chromium hexacarbonyl |
Article Data: | 217 |
Molecular Structure: | |
Formula: | C6CrO6 |
Molecular Weight: | 252.144 |
Synonyms: | Chromiumcarbonyl (Cr(CO)6) (8CI);Chromium carbonyl;Hexacarbonylchromium; |
EINECS: | 235-852-4 |
Density: | 1.77 g/cm3 |
Melting Point: | 150 °C |
Boiling Point: | 220 °C |
Solubility: | Insoluble in water |
Appearance: | white crystals or powder |
Hazard Symbols: | T, N |
Risk Codes: | 22-50/53-49-44-43-20/21/22 |
Safety: | 53-36-45-61-60-36/37 |
Transport Information: | UN 3466 6.1/PG 3 |
PSA: | 0.00000 |
LogP: | -1.24800 |
chromium(0) hexacarbonyl
chromium(CO)5(propanol)
Conditions | Yield |
---|---|
In propan-1-ol Irradiation (UV/VIS); laser-puls irradiation (308 nm, 90 fs, 400 nJ); not isolated; UV/VIS monitoring; |
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Chemical Name: Chromium hexacarbonyl
IUPAC Name: Carbon monoxide; chromium
CAS No.: 13007-92-6
EINECS: 235-852-4
RTECS: GB5075000
RTECS Class: Tumorigen ; Mutagen
EC Class: Carcinogenic
Molecular Formula: C6CrO6
Molecular Weight: 220.05 g/mol
Melting Point: >150 °C (dec.)(lit.)
Water Solubility: Insoluble
Sensitive: Light Sensitive/Heat Sensitive
Following is the structure of Hexacarbonylchromium (13007-92-6):
Product Categories about Hexacarbonylchromium (13007-92-6) are Catalysis and Inorganic Chemistry ; Chemical Synthesis ; Chromium ; Organic intermediates
The chemical synonymous of Hexacarbonylchromium (13007-92-6) are (Oc-6-11)-Chromiumcarbonyl ; (Oc-6-11)-Chromiumcarbonyl(Cr(CO)6 ; Chromcarbonyl ; Chromium Carbonyl (Cr(CO)6) ; Chromium Carbonyl (Cr(CO)6), (Oc-6-11)- ; Chromiumcarbonyl(Cr(CO)6) ; Chromiumcarbonyl(Cr(CO)6),(Oc-6-11)- ; Chromiumcarbonyl(Oc-6-11)
1. | cyt-ham:lng 2 g/L | MUREAV Mutation Research. 241 (1990),175. | ||
2. | orl-rat LD50:230 mg/kg | GTPZAB Gigiena Truda i Professionalnye Zabolevaniia. Labor Hygiene and Occupational Diseases. 20 (2)(1976),38. | ||
3. | ihl-rat LCLo:35 mg/m3/30M | GTPZAB Gigiena Truda i Professionalnye Zabolevaniia. Labor Hygiene and Occupational Diseases. 20 (2)(1976),38. | ||
4. | orl-mus LD50:150 mg/kg | GTPZAB Gigiena Truda i Professionalnye Zabolevaniia. Labor Hygiene and Occupational Diseases. 20 (2)(1976),38. | ||
5. | ivn-mus LD50:30 mg/kg | AQMOAC Air Quality Monographs. (American Petroleum Institute, 2101 L St., N.W., Washington, DC 20037) No. #70-15 ,1970. |
IARC Cancer Review: Animal Inadequate Evidence IMEMDT IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 23 , 1980,p. 205.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) ; Chromium and its compounds are on the Community Right-To-Know List. Reported in EPA TSCA Inventory.
Confirmed carcinogen with experimental tumorigenic data. Poison by ingestion and intravenous routes. Mutation data reported. Explodes at 210°C. See also CHROMIUM COMPOUNDS and CARBONYLS.
Analytical Methods:
OSHA PEL: CL 0.1 mg(CrO3)/m3
ACGIH TLV: TWA 0.05 mg(Cr)/m3; Confirmed Human Carcinogen
DFG MAK: DFG TRK: Confirmed Animal Carcinogen with Unknown Relevance to Humans
NIOSH REL: (Chromium(VI)) TWA 0.001 mg(Cr(VI))/m3
For occupational chemical analysis use NIOSH: Chromium Hexavalent 7024.
Hexacarbonylchromium (13007-92-6) is the chemical compound with the formula Cr(CO)6. At room temperature the solid is stable to air, although it does have a high vapor pressure and sublimes readily. Cr(CO)6 is zerovalent, meaning that Cr has a formal charge of zero, and it is called a homoleptic complex, which means that all the ligands are the same. The complex is octahedral with Cr-C and C-O distances of 1.92 and 1.17 Å, respectively.When heated or photolyzed in tetrahydrofuran (THF) solution, Cr(CO)6 converts to Cr(CO)5(THF) with loss of one CO ligand. Similarly, heating a solution of Cr(CO)6 in an aromatic solvent results in replacement of three CO ligands:
Cr(CO)6 + C6H5R → Cr(CO)3(C6H5R) + 3 CO
Such reactions proceed particularly well with electron-rich arenes such as anisole, either as the neat reagent or using a mixture of THF and dibutyl ether, the latter to increase the boiling point of the mixture. The products adopt a "piano-stool" structure. These species are typically yellow solids, which dissolve well in common organic solvents. The arene can be liberated from the chromium with iodine or by photolysis in air. In general, substituted derivatives of Cr(CO)6 decompose upon exposure to air.
Alkyl and aryl organolithium reagents RLi add to a carbonyl ligand to give anionic acyl complexes.These species react with alkylating agents such as Me3O+ to form (OC)5Cr=C(OMe)R, an example of a Fischer carbene. If the R group is a vinyl or an aryl group, then the resulting carbene complex can react with an acetylene to form a new benzene ring to which is bonded the chromium tricarbonyl fragment. The two acetylene carbon atoms become part of the new ring, as does a carbon from one of the carbonyl ligands. Also the three carbons from the vinyl carbene become part of the new benzene ring.