Methylcyclopentadienyl manganese tricarbonyl CAS#12108-13-3

Methylcyclopentadienyl manganese tricarbonyl, commonly referred to as Mn2(CO)10 or simply as “manganese carbonyl,” is an organometallic compound with the molecular formula C5H5MnO3. It is a dark brown to black crystalline solid that is highly sensitive to air and moisture due to its reactivity.

This compound is characterized by its cyclic structure, where a methyl group is attached to a cyclopentadienyl ring that is bonded to a manganese atom. The manganese atom is further coordinated by three carbonyl groups, which are essential to the stability of the molecule.

Mn2(CO)10 is used in various applications, including as a precursor in the synthesis of other organometallic compounds and in the production of specialty chemicals and materials. It is also utilized in the pharmaceutical industry for the synthesis of complex organic molecules and as a catalyst in certain chemical reactions.

The compound is known for its volatility and must be handled with care under an inert atmosphere to prevent decomposition. Its industrial applications are limited by its toxicity and the need for specialized handling procedures.

In summary, methylcyclopentadienyl manganese tricarbonyl is a versatile organometallic compound with a range of applications in chemical synthesis and industry. Its unique structure and reactivity make it a valuable yet challenging compound to work with in scientific and industrial settings.

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
color yellow
Specific Gravity 1.388
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)
Safety Information
Hazard Codes T,N,T+
Risk Statements 23/24/25-40-50/53-48/23-38-26-24/25
Safety Statements 23-26-36/37/39-45-61-60-36/37-28
RIDADR UN 3281 6.1/PG 2
OEB C
OEL TWA: 0.2 mg/m3 [skin]
WGK Germany 3
RTECS OP1450000
TSCA Yes
HazardClass 6.1
PackingGroup II
Hazardous Substances Data 12108-13-3(Hazardous Substances Data)
Toxicity LD50 orally in mice, guinea pig, rabbit: 352; 905; 95 mg/kg; orally in male, female rats: 175 ±33; 89 ±14; LC50 inhalation in rat: 0.22 mg/l (Stara)