Methyl cyclopentadienyl manganese

The absolute detection limit for manganese was 8-22pg for various organomanganese compounds including methyl cyclopentadienyl manganese tricarbonyl. 

The method is suitable for the determination of Mn, present as methyl-cyclopentadienyl manganese tricarbonyl, in gasoline in the range 0.5— 40/igml 1. The sample is reacted with bromine then diluted with MIBK and the standards prepared in a similar manner. This ensures an equal response from the Mn species in both sample and standard solutions. 

As regards the similarity with simple coordination of two-electron ligands, it is of interest to discuss the oxidative addition of silicon hybrid to methyl cyclopentadienyl-manganese carbonyl and the nature of the bonding in the adduct. Hydrido silyl-manganese complexes were first prepared by Jetz and Graham according to... 

AI3-61450 AK-33X Antiknock-33 CI-2 Combustion improver -2 EINECS 235-166-5 HSDB 2014 Manganese, (methylcyclopentadienyl)tricarbonyl- Man-ganese, trioarbonyl methylcyclopentadienyl Methyl-cyclopentadienyl manganese tricarbonyl Methyl-cykiopentadientrikarbonylmanganium ... 

Davis JM, Jaeabek AM, Mage DT and Graham JA (1998) The EPA health risk assessment of methyl-cyclopentadienyl manganese tricarbonyl (MMT). Risk Anal 18 57-70. 

Note Also see specific listings for Manganese cyclopentadienyl tricarbonyl, Methyl cyclopentadienyl manganese tricarbonyl, and Manganese tetroxide ]... 

Methyl cyclopentadienyl manganese tricarbonyl (as Mn) Formula CH3C5H4Mn(CO)3 CAS 12108-13-3 RTECS OP1450000 IDLH N.D. 

An early organometallic molecule, tetraethyl lead, which was first made in Zurich by Lowig [80], was widely used for a period of time as a fuel addihve, unhl recognition of its effects on the environment and its implicahon in cases of environmental poisoning led to its prohibition [81]. The toxicology of (ri -methyl-cyclopentadienyl) manganese tricarbonyl (MMT) has also been studied it is a permissible fuel additive in some jurisdictions in North America. 

A wide variety of additives is available to refiners to improve gasoline quality, including octane number. Although lead has been banned in most western Countries, other octane-enhancers like MMT (Methyl-Cyclopentadienyl Manganese Tri-carbonyl) are widely used. Gibbs, (1989), presents a review of the various types of additives currently employed. Oxidation inhibitors and metal deactivators are normally added in the refinery or processing plant to prevent oxidation and gum formation. Dyes for product identification and antiknock compounds can be added prior... 

Alternative additives include methanol and methyl cyclopentadienyl-manganese tricarbonyl (MMT) which have been thoroughly discussed elsewhere (Moran 1975, SMD 1976). 

Among the latest additives (1957) are methyl cyclopentadienyl manganese tricarbonyl of the Ethyl Corporation, and an organic boron compound of the Standard Oil Company of Ohio. The boron compound in small amounts (0.008—0.03 per cent) not only reduces combustion-zone deposits and surface ignition but also increases the effectiveness of tetraethyllead. Antiknock effects are greatest with leaded straight-run or A[Pg.38]

The anionic complex, in which three dicarbonyl(cyclopentadienyl)manganese groups are connected by a bridging methanetellurolate ligand, was obtained from the corresponding /r3-tcllurido compound and methyl lithium. 

Chiral silyl-manganese complexes have also been obtained from optically active silicon hydrides. The oxidative addition of silicon hydride to methyl cyclopentadienyl... 

Recently a manganese tricarbonyl compound, commonly known as methyl-cyclopentadienyl memganese tricarbonyl (MMT), has been added to various fuels to improve combustion and as an octane improver in automobile gasolines. Thus release of manganese into the biosphere as a result of various human activities, has created great concern about possibly increasing health hazards fix)m this metal. 

Cbz Cp DABCO DBU DDQ (DHQD)2CLB (DHQD)2PYR DMF DME DMPU DMSO Et Fmoc HMPA ia KHMDS LDA LiHMDS Me MEM Ms NaHMDS Ph Piv PMB Pr Py (saltmen)Mn(N) benzyloxy carbonyl p 5 -cyclopentadienyl l,4-diazabicyclo[2.2.2]octane l,8-diazabicyclo[5.4.0]undec-7-ene 2,3 -dichloro-5,6-dicyanobenzoquinone dihydroquinidinyl p-chlorobenzoale (see Chart 1) dihydroquinidinyl pyrimidine (see Chart 1) dimethylformamide dimethoxyethane l,3-dimethyl-3,4,5,6-tetrahydro-2(l//)-pyrimidinone dimethylsulfoxide ethyl 9-fluorenylmethoxy carbonyl hexamethylphosphoric triamide inverse addition potassium hexamethyldisilazide lithium diisopropylamide lithium hexamethyldisilazide methyl (2-methoxy ethoxy )methyl methanesulfonyl sodium hexamethyldisilazide phenyl pivaloyl p -methoxy benzyl propyl pyridine nitrido[A,A/-(l,l,2,2-tetramethyl) bis(salicylideneaminato)]manganese (see Chart 1)... 

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