Reaction Of Iron Pentacarbonyl Research Articles

Graphitic encapsulation of MgO and Fe3C nanoparticles in the reaction of iron pentacarbonyl with magnesium

Abstract A simple method to produce highly ordered carbon nanostructures by combustion synthesis is presented. Graphite-encapsulated magnesium oxide, iron carbide nanoparticles and carbon nanobelts were synthesized by the one-step reduction of iron pentacarbonyl with magnesium. High-resolution transmission electron microscopy analysis of the products revealed nanocrystalline MgO and Fe 3 C particles surrounded by a well-crystallized, tight graphite film. The possible formation mechanism is presented and discussed.

FeS2 quantum dots sensitized nanostructured TiO2 solar cell: photoelectrochemical and photoinduced absorption spectroscopy studies

Thin films of nanostructured TiO2 have been modified with FeS2 (pyrite) nano-particles by a low temperature chemical reaction of iron pentacarbonyl with sulfur in xylene. Quantum size effects are manifested by the observation of a blue shift in both absorption and photocurrent action spectra. PIA (Photoinduced absorption spectroscopy), where the excitation is provided by a square-wave modulated (on/off) monochromatic light emitting diode, is a multipurpose tool in the study of dye-sensitized solar cells. Here, PIA is used to study quantum-dot modified TiO2 nanostructured electrodes. The PIA spectra obtained give evidence for long-lived photoinduced charge separation: electrons are injected into the metal oxide and holes are left behind in the FeS2 quantum dot. Time-resolved PIA shows that recombination between electrons and holes occurs on a millisecond timescale. The Incident-Photon-to-Current Efficiency of about 23 % was obtained at 400 nm excitation. The performances of TiO2 electrodes modified with FeS2 are relatively low, which is explained by the presence of FeS2 phases other than the photoactive pyrite phase, as follows from the XRD spectrum.

Formation of iron oxide powder in a hot-wall flow reactor: Effect of process conditions on powder characteristics

Nanometer-sized iron oxide powder was prepared by reaction of iron pentacarbonyl (Fe(CO)5) and oxygen in a gas phase reactor. X-ray diffraction and differential thermal analysis revealed that depending on the reaction temperature α-Fe2O3 (temperature>600°C) or the thermodynamically less stable γ-Fe2O3 (temperature<600°C) was formed. The surface area of the γ-Fe2O3 was in the range 100–240m2g−1. By reducing the reaction pressure, the surface area of the powders produced was increased. High precursor concentrations also favored the formation of powders with higher surface areas. While the pressure effect can be explained by the growth time of the particles, the slower particle growth at higher initial Fe(CO)5 concentration is unexpected and cannot be explained by diffusion-controlled particle coagulation. Transmission electron microscopy of γ-Fe2O3 revealed in accordance with area measurements primary particle diameters below 10nm.

Reaction of iron pentacarbonyl with N, N-diethyl- S-ethylcarbamate; crystal structure of [{Fe(CO) 6} 3(μ 4-S) 2(μ-CNEt 2) 2] 3( feFe), a compound containing three butterfly units

Reaction of iron pentacarboynl with N, N-diethyl- S-ethylcarbamate {SC-(NEt 2)SEt} gave [{Fe 2(CO) 6}{Fe 3(CO) 9(μ 4-S)(μ-CNEt 2(μ-SEt)}] (FeFe)3-(FeFe) (I) and [{Fe 2(CO) 6} 3(μ 4-S) 2(μ-CNEt 2 3(FeFe) (II). The structure of complex II has been determined by single crystal X-ray crystallography. It crystallizes from methylene chloride as C 26H 20O 18N 2S 2Fe 6·1/2CH 2Cl 2 in the monoclinic space group C2/ c with a 46.754(2), b 9.268(1), c 19.628(2) Å, β 100.7(1)°, Z = 8, V 8358.6 Å 3, D c 1.77 g cm −3, D m 1.77 gm cm −3. The strucutre was solved by direct methods and refined to R = 0.0819 ( R w = 0.0469) for 3017 relfections. It consists of three metalmetal bonded Fe 2(CO) 6 units linearly linked in butterfly configuration by two bridging sulphur athoms, and terminated on both sides by bridging diethylimoniocarbene (CNEt 2) ligands.

Stereochemistry of the reaction of 7-substituted norbornadienes with iron carbonyls. 3. Reaction of iron pentacarbonyl with 7-(benzoyloxy)norbornadiene

Stereochemistry of the reaction of 7-substituted norbornadienes with iron carbonyls. 3. Reaction of iron pentacarbonyl with 7-(benzoyloxy)norbornadiene

Reaction of iron pentacarbonyl with ethyl dichloroacetoacetate and dichloroacetylacetone

Ethyl dichloroacetoacetate and dichloroacetylacetone react with Fe(CO)5 to form iron chelates Fe[ClC · (COR)COCH3]3 (R=OEt and Me). The structures of these chelates were elucidated by35Cl NQR, mass, and IR spectroscopy.

Preparation of Iron Carbonyls Supported on Organic Polymers

AbstractTriphenylphosphine ligand functionality could be readily introduced onto the 2% DVB and 12% DVB cross‐linked polystyrenes. Significant differences in reaction rates and loading capacities were observed in favor of the 2% DVB percentage cross‐linkage. The reaction of iron pentacarbonyl with polymeric ligand gave both monocoordination and biscoordination products. Product distribution analyses indicated that monocoordination was favored for both kind of polymeric ligands. Ratio of biscoordination to monocoordination was higher for the 2% DVB polystyrene ligand than for the 12% DVB polystyrene ligand indicating biscoordination proceeded more easily on the former.

Reaction of iron pentacarbonyl with an activated vermiculite surface

Reaction of iron pentacarbonyl with an activated vermiculite surface

Reactions of iron pentacarbonyl and dihydrogen tetracarbonylferrate related to the water-gas shift reaction

Reactions of iron pentacarbonyl and dihydrogen tetracarbonylferrate related to the water-gas shift reaction

Polymers as Matrices for Photochemical Reactions of Organometallic Compounds

Abstract A new matrix technique developed in our laboratory for the study of bimolecular photochemical processes and the isolation of unstable and air-sensitive organometallic compounds is described. This technique provides a simple and unexpensive method for studying these compounds at room temperature and ambient atmosphere. The matrices used are films of inert polymers, such as polytetra-fluorethylene (PTFE) and polyethylene (PE). We have used this method to study, by means of infrared (i.r.) spectroscopy, the photochemical products and reactions of ironpentacarbonyl with olefins, such as: ethylene, acrylic acid, methylacrylate, nor-bornadiene, butadiene and isoprene; as well as to study the photofragmentation of ironpentacarbonyl. Evidence indicates that, in addition to permitting work, with these compounds at ambient conditions, the method has other advantages over the usual low temperature frozen gas matrices.

Mixed iron and cobalt acetylenic carbonyl derivatives

Acetylenic derivatives of mixed metal carbonyl clusters have so far received little attention [1]. Confining to the case of mixed iron and cobalt species HFeCo 3(CO) 9(C 2Ph 2) 2 [1],FeCo 3(CO) 10 C 2Ph − 2 and FeCO 3(CO) 8C 2Ph 2 [2] havebeen reported, but not fully characterized. We have studied the reactions of aliphatic acetylenes with iron and cobalt carbonyls by reacting in acetone the alkyne either with a preformed iron and cobalt cluster, HFeCo 3(CO) 12, or with a mixture of Fe(CO) 5 and Co 2(CO) 8. The products are substantially the same from both reactions, but they are obtained in different yields. For the alkyne being 3-hexyne the following complexes have been obtained: Co 4(CO) 10C 2Et 2, Co 2(CO) 6C 2Et 2, Co( 2(CO) 6EtC 2COMe, Co 2(CO) 6EtC 2CHOHMe, FeCo 2(CO) 9C 2Et 2, FeCo(CO) 6 EtC 2CHMe. The known cobalt derivatives have been fully characterized by m.s., i.r., 1H and 13C-n.m.r. The activation of one of the methylene groups α to the triple bond has also been observed in the products of the reaction with 4-octyne. The results of the reactions of HFeCo 3(CO) 12 with 3-hexyne in various solvents suggest that water is the source of the oxygen. The single crystal X-ray analysis of FeCo 2(CO) 9C 2Et 2 shows that the complex is made of an iron and cobalt triangle with three terminal CO's bonded to each metal atom. The organic ligand is σ bonded to each cobalt atom and π coordinated to the iron one, acting as a four electron donor. The binuclear iron and cobalt derivative is obtained in low yield from the above reactions, but the yield is increased to 50% by reacting Fe(CO) 5 with Co 2(CO) 6EtC 2CHOHMe. Similarly from the reaction of iron pentacarbonyl with Co 2(CO) 6C 2(CH 2OH) 2, FeCo(CO) 6CH 2OHC 2CH 2 is obtained: in this reaction also complete dehydroxylation of the ligand occurs with transfer of the ligand from cobalt to iron to give the known Fe 2(CO) 6CH 2C 2CH 2 complex [3]. On this evidence and on the basis of the spectroscopic data we suggest for the FeCo(CO) 6RC 2CHR′ derivatives a structure in which the ligand is σ bonded to the iron atom ( via the carbon atom previously bearing the hydroxy group) and π coordinated to the iron and cobalt atoms. The stereochemical non rigidity of the novel complexes and of FeCo 3(CO) − 12 will be discussed and compared with that of other iron and cobalt mixed clusters [4].

Reaction of iron pentacarbonyl with oxygen-18-enriched hydroxide. Decarboxylation vs. oxygen exchange in the [Fe(COOH)] intermediate

Reaction of iron pentacarbonyl with oxygen-18-enriched hydroxide. Decarboxylation vs. oxygen exchange in the [Fe(COOH)] intermediate

Etude de la condensation du fer pentacarbonyle et du fer nonacarbonyle sur le benzo[b]thiophene dioxyde-1,1

The reaction of iron pentacarbonyl or iron nonacarbonyl with benzo[b]-thiophen-1,1-dioxide leads to two complexes: benzo[b]thiophen-1,1-dioxide tricarbonyliron and -tetracarbonyliron. The structures of products are determined by NMR and mass spectroscopy. That of benzo[b]thiophen-1,1-dioxide tetracarbonyliron is confirmed by X-ray spectroscopy.

Organometallic complexes in synthesis. Part V. Some tricarbonyliron derivatives of cyclohexadienecarboxylic acids

Reactions of iron pentacarbonyl with several methyl cyclohexadienecarboxylates lead to tricarbonyliron complexes. The most stable of these is the ‘conjugated’ isomer (2; R = Me), which can be obtained from the others by treatment with methanolic acid or in some cases with methanolic methoxide. The latter method is the first observed example of base-catalysed isomerisation in tricarbonylcyclohexadieneiron complexes. When deuteriated reagents are used the acidic procedure leads to incorporation of one deuterium atom only, in the 6-position. irrespective of the starting material. Reactions of the acids with diborane yield the carbinols, one of which [tricarbonyl-1 -(hydroxymethyl)cyclohexa-1,3-dieneiron (8)], on treatment with acid, produces the rearranged carbonium salt (9). Hydride abstraction from the isomeric esters gives a series of carbonium salts, which react with water at various rates to produce hydroxy-complexes and dimeric ethers. Complexing of some methyl methylcyclohexa-1,4-dienecarboxylates is reported. Aspects of theory connected with hydrogen migration and hydride abstraction are discussed.

Formation of 1,4-diketones, monoketones, and .beta.-epoxy ketones by reaction of iron pentacarbonyl with .alpha.-halo ketones. Possible mechanism for iron pentacarbonyl-halide reactions

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFormation of 1,4-diketones, monoketones, and .beta.-epoxy ketones by reaction of iron pentacarbonyl with .alpha.-halo ketones. Possible mechanism for iron pentacarbonyl-halide reactionsHoward Alper and Edmund C. H. KeungCite this: J. Org. Chem. 1972, 37, 16, 2566–2572Publication Date (Print):August 1, 1972Publication History Published online1 May 2002Published inissue 1 August 1972https://doi.org/10.1021/jo00981a011RIGHTS & PERMISSIONSArticle Views273Altmetric-Citations34LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (929 KB) Get e-Alerts Get e-Alerts

Reactions of iron pentacarbonyl with compounds containing the N—O linkage

Amine oxides, azoxybenzenes, and nitrones are deoxygenated in good yields by iron pentacarbonyl in hot butyl ether. Substituted nitro- and nitrosobenzenes are reduced under these conditions to azo and/or amino compounds, depending on the nature and location of the substituents; some evidence for nitrene or nitrene-like intermediates in these reactions is presented.

Reaction of iron pentacarbonyl with sulfonyl chlorides

Reaction of iron pentacarbonyl with sulfonyl chlorides

Reactions of iron pentacarbonyl with some steroid dienes

Tricarbonyliron complexes of steroidal Δ 2,4- and Δ 5,7-dienes have been prepared. The transoid Δ 3,5- and Δ 4,6-dienes, when heated with iron pentacarbonyl, rearrange to form the cisoid Δ 2,4-diene complexes. Complex formation, followed by liberation of the diene ligand, thus offers a means of converting heteroannular steroidal dienes into their thermodynamically less stable homoannular isomers.

The Reaction of Iron Pentacarbonyl with Acetylacetone

The Reaction of Iron Pentacarbonyl with Acetylacetone

Compounds containing Mercury – Iron Bonds

Hock and Stuhlman1 discovered that the reaction of iron pentacarbonyl with mercuric halides yielded solid products, which they formulated as addition compounds Fe(CO)4Hg·(HgX2), containing the Fe(CO)4Hg moiety which itself can be obtained by reaction of iron pentacarbonyl and mercuric sulphate. No structural information on these compounds is available, although Wells2 has suggested that Fe(CO)4Hg is polymeric and trans.