Iron dodecacarbonyl

Triiron dodecacarbonyl Iron dodecacarbonyl- (8) Iron, di-p,-decacarbonyltri-, triangulo- (9) (17685-52-8)... 

Tri-iron dodecacarbonyl was prepared according to (l8) bis (cyclopentadienyldicarbonyliron) was prepared according to (19) tri-ruthenium dodecacarbonyl and di-cobalt octacarbonyl were supplied by Strem Chemicals. 

Tri-iron dodecacarbonyl zeolites adducts. The adducts Fe3(C0)12-HY and Fe3(CO) 2-NaY were used as starting materials. 

Nitroarenes are reduced to anilines (>85%) under the influence of metal carbonyl complexes. In a two-phase system, the complex hydridoiron complex [HFe,(CO)u]2-is produced from tri-iron dodecacarbonyl at the interface between the organic phase and the basic aqueous phase [7], The generation of the active hydridoiron complex is catalysed by a range of quaternary ammonium salts and an analogous hydrido-manganese complex is obtained from dimanganese decacarbonyl under similar conditions [8], Virtually no reduction occurs in the absence of the quaternary ammonium salt, and the reduction is also suppressed by the presence of carbon monoxide [9], In contrast, dicobalt octacarbonyl reacts with quaternary ammonium fluorides to form complexes which do not reduce nitroarenes. 

Desulphurization of thiols has been accomplished in high yield under phase-transfer conditions using tri-iron dodecacarbonyl (or dicobalt octacarbonyl). The mechanism proposed for the formation of the alkanes and the dialkyl sulphide byproducts involves a one electron transfer to the thiol from the initially formed quaternary ammonium hydridoiron polycarbonyl ion pair [14], Similar one electron transfers have been postulated for the key step in the cobalt carbonyl promoted reactions, which tend to give slightly higher yields of the alkanes (Table 11.18). 

Iron pentacarbonyl Iron nonacarbonyl Iron dodecacarbonyl Iron hydrocarbonyl... 

The nonacarbonyl is an orange-yeUow crystalline solid at ambient temperatures density 2.85 g/cm decomposes at 100°C. Iron dodecacarbonyl is a black crystalline solid density 2.0g/cm3 decomposes at 140°C. Iron hydrocarbonyl is an unstable colorless liquid solidifies at -70°C decomposes on heating insoluble in water, soluble in alkalis. 

One of the complexes formed in the reaction of diphenylacetylene and iron dodecacarbonyl is a red, crystalline compound of the composition [Fe2(CO)6(PhC2Ph)], which, on reduction with sodium in liquid ammonia, gives dibenzyl (117). By analogy with the cobalt carbonyl complex, structure (XXXV M = Fe) is proposed, in which the 7r-elcctrons of the triple... 

The reaction of acetylenes with the iron carbonyls gives a wide variety of stable complexes, the composition of which depends on the alkyne, the carbonyl, the reaction temperature, and the solvent used in the preparation (Table III) 116, 117, 118, 120, 182, 187). Iron dodecacarbonyl yields as many as seven different kinds of complexes, depending on the acetylene studied. The complexes are generally yellow, red, or black, soluble in organic solvents, and are invariably diamagnetic they show infrared absorption... 

Reactions of Tri-iron Dodecacarbonyl with Thiophene (3.281) [732a]... 

Decomposition of methanesulphonyl azide in aromatic solvents (methyl benzoate or benzotrifluoride), in the presence of transition metal compounds (e.g. copper(ri) acetylacetonate, manganese(ii) acetylacetonate, di-cobalt octacarbonyl, tri-iron dodecacarbonyl, and iron pentacarbonyl) led to a marked decrease in the aromatic substitution product compared with thermolysis, and, with the iron carbonyls, to an increased yield of methanesulphonamide . In addition, the aromatic substitution products shifted from mainly ortAo-substitution with no additives to mainly w ia-substitution in the presence of the additives mentioned above. 

All three Group 8 metals form trinuclear clusters M3(CO)i2. However, while all carbonyl ligands in ruthenium and osmium dodecacarbonyl complexes coordinate to the metal center as terminal carbonyls, there are two bridged carbonyl groups in iron dodecacarbonyl. This may be due to the smaller van der Waals radius of the iron atom. In this section, Fe(CO)5, Fe2(CO)9and Na2[Fe(CO)4] are reviewed. 

E. Kirsten and J.L. Spencer [56] synthesized CNTs from an aerosol precursor. Solutions of transition-metal cluster compounds were atomized by electrohyrodynamic means and the resultant aerosol was reacted with ethylene in the gas phase to catalyse the formation of CNTs. The use of an aerosol of iron pentacarbonyl resulted in the formation of MWNTs, mostly 6-9 nm in diameter, whereas the use of iron dodecacarbonyl gave results that were dependent on the concentration. High concentrations resulted in a wide diameter range (30-200 nm), whereas lower concentrations gave MWNTs with diameters of 19-23 nm. 

The conversion of (828) into (829) and (830) on heating with tri-iron dodecacarbonyl is the first demonstration of the formation of ferroles from a cyclobutadiene and has implications for the mechanism of ferrole formation from cyclic bis-alkynes. ... 

Vitamin A acetate (6,02 mmole) reacted with ui-iron dodecacarbonyl (6,6 mmole) in refluxing benzene (20 ml) under nitrogen for 6 hours. In the course of the reaction ca, 200 ml (8 mmole) of a gas was evolved. The initial green color of the reaction mixture faded as the reaction proceeded and finally turned to brown. The brown precipitate formed was removed by... 

Retinaldehyde (2) reacted with iron dodecacarbonyl to form the complex (57), in which an iron tricarbonyl fragment is bonded to the polyene chain (Birch et al., 1966 Birch and Fitton, 1966 Brodie et aL, 1973). 

This complex reacted with sodium borohydride to give the retro compound (58) (Anhydrovitamin A). Iron dodecacarbonyl also reacted with retinyl acetate (9) to give iron complexes (Nakamura and Tsutsui, 1964). 

Chemical Properties.— Thiirans are desulphurized to olefins by molybdenum complex (51), hydridopentacarbonylmanganese," di-iron enneacar-bonyl, tri-iron dodecacarbonyl," tungsten hexachloride, and molybdenum pentachloride." The desulphurization is stereospeciiic in several cases. The reaction of cis- and trans-2,3-dimethylthiirans with n-butyl-lithium,... 

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