Pentacarbonyliron

Pentacarbonyliron Acetic acid, nitric oxide, transition metal halides, water, zinc... 

Bis-dimethylstibinyl oxide Pentacarbonyliron Dicerium trisulphide Butyidichloroborane... 

The light-induced reaction of pentacarbonyliron with oxepin or 2,7-dimethyloxepin results in the formation of small quantities (3-5 %) of a tricarbonyliron complex of the seven-mem-bered heterocycle.253,251 The main products are benzene (o-xylene) and phenol (2,6-dimethyl-phenol). When 1-benzoxepin is treated with pentacarbonyliron, the tricarbonyliron complex is obtained in 22% yield.254... 

The first stable carbonylmetal-l//-azepine complex 25 (R = Et) was obtained by irradiating a mixture of ethyl 1 //-azepine-l-carboxylate (24, R = Et) and pentacarbonyliron(O) in tetrahy-drofuran (Method A).220 Hydrolysis of the complex with sodium methoxide gave azepine)tricarbonyliron(O) (26). Subsequently, the reaction of 24 with nonacarbonyldiiron(O) in warm benzene is reported to be a simpler and cleaner process.61 Both procedures fail, however, with alkyl-substituted l/Z-azepine-l-carboxylates. 

A mixture of ethyl 1//-azepine-l-carboxylate (24, R = Et 2.74 g, 17.3 mmol) and pentacarbonyliron(O) (4.16 g, 22 mmol) inTHF (25 mL) was irradiated with UV light for 30 h, during which time CO (g)(710mL) was evolved. (Caution reaction must be carried out in an efficient fume hood). The solution was reduced in volume and the residue chromatographed (neutral alumina, hexane). After removal of the solvent the product was purified by sublimation under high vacuum at 60 C yield 4.04g (77%) mp 87°C. The tricarbonyliron(O) complex of ethyl 2,4,7-trimethyl-1//-azepine-1-carboxylate (11.6% mp 54 C) was prepared similarly. 

Pentacarbonyliron, Pyrex glass Shore, S. G. et al., Inorg. Chem., 1979,18, 670... 

See Pentacarbonyliron Transition metal halides See other metal halides... 

Xenon difluoride (or the tetrafluoride, or their mixtures) could not be caused to detonate by impact. Xenon difluoride and xenon tetrafluoride both may cause explosion in contact with acetone, aluminium, pentacarbonyliron, styrene, polyethylene, lubricants, paper, sawdust, wool or other combustible materials. Their vigorous reactions with ethanol, potassium iodate or potassium permanganate are not explosive, however. 

The reason for a previously reported explosion during reduction of iron oxide with carbon monoxide is given as the formation of pentacarbonyliron at temperatures between 0 and 150°C. Suitable heating arrangements and precautions will eliminate this hazard. 

Palladium Paraformaldehyde Paraldehyde Pentaborane-9 Pentacarbonyliron Arsenic, carbon, ozonides, sulfur, sodium tetrahydridoborate Liquid oxygen Alkalies, HCN, iodides, nitric acid, oxidizers Dimethylsulfoxide Acetic acid, nitric oxide, transition metal halides, water, zinc... 

The catalytic complexation of cyclohexa-1,3-diene 2b is much superior to the classical procedures by direct reaction of the diene with pentacarbonyliron... 

The first study has shown that dehydrodithizone (413, R = R = Ph) reacts with pentacarbonyliron to give the l,3,4-thiadiazol-2-one (509). 

The solvent and excess pentacarbonyliron are removed under reduced pressure and the product is recrystallized from dichloromethane-hexane. Yield 3.56 g (83% based on consumed pentacarbonyliron). 

Caution. Carbon monoxide and pentacarbonyliron are poisons. All manipulations should be carried out in a well-ventilated hood. 

ONE-POT SYNTHESIS OF DICARBONYLTRIS(PHOSPHANE)IRON(0) COMPLEXES FROM PENTACARBONYLIRON... 

Caution. Due to the toxic nature of pentacarbonyliron and to the evolution of highly toxic carbon monoxide (a colorless and odorless gas) and of highly flammable hydrogen, and also because of the toxic nature, bad odor, and risk of ignition of liquid phosphanes, these reactions should be performed in a well-ventilated hood and gloves should be worn. 

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