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| | Methylcyclopentadienyl manganese tricarbonyl Basic information |
| | Methylcyclopentadienyl manganese tricarbonyl Chemical Properties |
| Melting point | -1 °C (lit.) | | Boiling point | 232-233 °C (lit.) | | density | 1.38 g/mL at 25 °C (lit.) | | vapor density | >1 (vs air) | | vapor pressure | 0.05 mm Hg ( 20 °C) | | refractive index | n20/D 1.584(lit.) | | Fp | 205 °F | | storage temp. | Poison room | | form | liquid | | Specific Gravity | 1.388 | | color | yellow | | Water Solubility | Insoluble in water. Soluble in hydrocarbon solvents, alcohols, ether, acetone | | Sensitive | Air Sensitive | | Merck | 14,6223 | | Exposure limits | ACGIH: TWA 0.2 mg/m3 (Skin)
OSHA: Ceiling 5 mg/m3
NIOSH: IDLH 500 mg/m3; TWA 0.2 mg/m3; TWA 1 mg/m3; STEL 3 mg/m3 | | Stability: | Stable. Incompatible with strong oxidizing agents. | | InChIKey | LYHJNAIHGFWRKM-UHFFFAOYSA-N | | LogP | 3.4 at 26℃ | | CAS DataBase Reference | 12108-13-3(CAS DataBase Reference) | | EPA Substance Registry System | Methylcyclopentadienyl manganese tricarbonyl (12108-13-3) |
| | Methylcyclopentadienyl manganese tricarbonyl Usage And Synthesis |
| Chemical Properties | An orange liquid with a pleasant odor. Slightly soluble in water and denser than water. May be toxic by inhalation, ingestion and/or skin absorption. Faintly pleasant, herb-like odor. | | Uses | Methylcyclopentadienyl manganese tricarbonyl is used for doping of ZnSe nanocrystals
It can also be used as a reactant for:
Aldol addition reactions
Preparation of homo- and heteronuclear mixed biscarbene complexes with conjugated bithiophene units
Molecular fragmentation using shaped femtosecond laser pulses
Preparation of MnAs thin films grown on GaAs(001) by metalorganic vapour phase epitaxy (MOVPE) | | Uses | Antiknock fuel additive; dopant for Mn. | | Uses | Octane enhancer in gasoline; reduces
smoke emissions from home, commercial,
industrial, and marine burners | | Definition |
Methylcyclopentadienyl Manganese Tricarbonyl is a dark orange liquid with a faintly pleasant odor. It is used as a fuel additive to abate smoke and as a gasolinc additive in antiknock mixes.
| | Preparation | Into a reaction flask under nitrogen was placed 1.26 parts bis(methylcyclopentadienyl) manganese (91.8% pure), 0.93 parts manganous acetate, 0.78 parts tetrahydrofuran (THF) and 17.31 parts toluene. Over a period of 15 minutes, a solution of 1.24 parts triethyl aluminum (TEA) in 8.70 parts of toluene was added to the above mixture with a vigorous stirring (Al/Mn atom ratio 1/1, TEA/THF mole ratio 1/1). The solution darkened slightly. This solution of the intermediate complex was transferred under nitrogen to a stainless steel autoclave. The autoclave was sealed, pressurized twice to 300 psig with carbon monoxide and vented and finally pressurized with carbon monoxide to 600 psig and heated while stirring to 100° C. Carbon monoxide was added as needed to maintain 600 psig. After two hours at 100° C., the temperature was raised to 150° C. for 30 minutes. The autoclave was then cooled, vented and discharged. The mixture was hydrolyzed with 10% aqueous HCl. An equal volume of pentane was added to extract the MMT. The pentane phase was analyzed by gas chromoatograph (GC) using a pentadecane internal standard to show a yield of Methylcyclopentadienyl manganese tricarbonyl(MMT) based on manganese of 84% and, based on MCP, of 89%. | | General Description | Methylcyclopentadienyl manganese tricarbonyl (hereinafter "MMT") is an antiknock agent for gasoline discovered in the fifties and sold commercially by Ethyl Corporation. It can be made by the reaction of carbon monoxide with bis(methylcyclopentadienyl) manganese referred to as "carbonylation". | | Air & Water Reactions | Slightly soluble in water. | | Reactivity Profile | METHYLCYCLOPENTADIENYLMANGANESE TRICARBONYL decomposes when exposed to light. METHYLCYCLOPENTADIENYLMANGANESE TRICARBONYL is stable in water. | | Hazard | Toxic by ingestion, inhalation, and skinabsorption. Central nervous system impairment;lung, liver and kidney damage. | | Health Hazard | In concentrated form METHYLCYCLOPENTADIENYLMANGANESE TRICARBONYL is highly toxic by all routes of exposure. Approximately 5-15 ml, when spilled on the hand and wrist of a worker, produced toxic effects within 3-5 minutes. | | Fire Hazard | When heated to decomposition, METHYLCYCLOPENTADIENYLMANGANESE TRICARBONYL emits toxic fumes of carbon monoxide. Hazardous polymerization may not occur. | | Flammability and Explosibility | Nonflammable | | Safety Profile | Poison by ingestion,
inhalation, skin contact, intravenous, and
intraperitoneal routes. A slimn irritant. When
heated to decomposition it emits toxic
fumes of CO. See also MANGANESE
COMPOUNDS and CARBONYLS. | | Potential Exposure | MMT is used as an octane improver
in unleaded gasoline, other distillate fuels, and fuel oils;
as a smoke abater in fuels. | | Shipping | UN3281 Metal carbonyls, liquid n.o.s. Hazard
class 6.1. Technical name required, Potential Inhalation
Hazard (Special Provision 5). | | Incompatibilities | Light causes decomposition. May be
air-reactive. A strong reducing agent. Incompatible with oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine, fluorine, etc.); contact may cause
fires or explosions. Keep away from alkaline materials,
strong bases, strong acids, oxoacids, epoxides, halogens. | | Waste Disposal | Generators of waste (equal
to or greater than 100 kg/mo) containing this contaminant, EPA hazardous waste number N450, must conform
to USEPA regulations for storage, transportation, treatment, and disposal of waste. Dispose of waste material
as hazardous waste using a licensed disposal contractor
to an approved landfill. Dispose of contents and container to an approved waste disposal plant. Containers
must be disposed of properly by following package label
directions or by contacting your local or federal environmental control agency, or by contacting your regional
EPA office. All federal, state, and local environmental
regulations must be observed. Do not discharge into
drains or sewers.
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| | Methylcyclopentadienyl manganese tricarbonyl Preparation Products And Raw materials |
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