Diiron nonacarbonyl

CN > NO2 > NH3 > H2O, F > Cl . Exceptions do occur. Photochemical Ligand dissociation is useful in the synthesis of multinuclear metal complexes such as diiron nonacarbonyl [15321-51 from iron pentacarbonyl [13463-40-6]... 

The strained-ring compound 1,1-dimethyl-l-silacyclobutane (which may be regarded as an olefin of organosilicon chemistry) reacts with diiron nonacarbonyl in benzene at 6°-20°C as shown in Eq. (100) (89). (There is here some analogy with the reactions of transition metal complexes with strained hydrocarbons, which often produce valence tautomerization.) The... 

The interaction of butadiynediyl dimetal complexes [Fp -C -CsC-M, Fp =FeCp (CO)2, M= Fp, Rp, SiMea, Rp= RuCp(CO)2] with diiron nonacarbonyl, Fe2(CO)9, results in the formation of a mixture of products, as is also observed in the case of their interaction with organic acetylenes. Interesting polymetallic complexes, propargylidene-ketene compounds, zwitterionic cluster compounds, and pa-p -propargylidene-cyclobutene compoimds were isolated from the reaction mixtures and successfully characterized. The product distributions were found to be dependent on the metal fragment (M) at the other end of the C4 rod. The results of the reaction are described... 

The successful deoxygenation of the sulfoxide 18a by either hexachlorodisilane as the reducing agent, or diiron nonacarbonyl according to the deoxygenation-complexation route can also be rationalized in terms of electrophilic attack of the reagents used on the nucleophilic sulfoxy oxygen. 

Diazidobiphenyl is transformed by diiron nonacarbonyl into a cyclic urea together with a small amount of the bridged dinuclear complex 142 the latter is a minor product but it can be converted oxidatively into benzocinnoline (Scheme 165).191... 

Formation of the reduced 1,3-oxazepine derivative 160 from the reaction of diiron nonacarbonyl with the tetrahydrooxazine derivative (159) involves a novel formal insertion of carbon monoxide into an N—O bond (Scheme 183).248 The synthetic applicability of this unusual reaction has not been evaluated. 

The binary metal carbonyls are named by giving the name of the metal followed by the name carbonyl, with the number of carbonyl groups indicated by the appropriate prefix. For example, Ni(CO)4 is nickel tetracarbonyl, whereas Cr(CO)6 is chromium hexacarbonyl. If more than one metal atom is present, the number is indicated by a prefix. Thus, Co2(CO)8 is dicobalt octacarbonyl, and Fe2(CO)9 has the name diiron nonacarbonyl. 

Photolysis of Fe(CO)5 leads to partial removal of CO to produce diiron nonacarbonyl. 

Dihydroxytetrahydronapthacenedione derivatives, 12 175 Diiminosuccinonitrile, 8 174 Diiodoacetic acid, 1 144 1,2-Diiodoethylene, production from acetylene, 1 180 Diiron nonacarbonyl, 7 591 14 550—551 16 62... 

In a complementary study, Weiss reacted equimolar amounts of diiron nonacarbonyl and various cyclopropenes, yielding the products 130.a-130.f in fair to good yield.103 Notice that (on crystallographic evidence), he prefers to represent the products in the rf r -allylacyl structure (see Section 1). Once isolated, the phenyl-substituted vinylketene complexes were reacted... 

The thermolysis of certain members of the carbomethoxy series (146.C and 145.c) results in a decarbonylation reaction that affords the exclusively E -diene complexes 150 or the E/Z-diene complex mixtures 151, respectively. These products may be formed by direct thermolysis of the precursor cyclopropene (144) in the presence of diiron nonacarbonyl, isolated in 80% overall yield and in a approximate ratio of 3 2 1 (150 Z-151 -151), a product distribution matching that obtained from the isolated vinylketene... 

In 1987, Nitta reported the formation of an unexpected vinylketene complex from the reaction of an azido-substituted cyclopropene with diiron nonacarbonyl.104 They had previously investigated the chemical behavior of the complexed nitrene intermediates that result from the reaction of organic azides and iron carbonyls113 and were interested in replicating the thermal isomerization of 3-azido-l,2,3-triphenylcyclopropene (163) into 4,5,6-triphenyl-l,2,3-triazine using a metal carbonyl-promoted re-... 

The side product is formed by the addition of a [Fe(CO)3] unit to the postulated -vinylcarbene (182), generated in situ from the decarbonyla-tion of a vinylketene complex. Indeed, such a diiron species may be synthesized by direct addition of diiron nonacarbonyl to the vinylketene precursor 178.a, or by direct thermolysis of 178.a in toluene. 

The earliest alternative to cyclopropene insertion as a viable vinylketene synthesis was published by Hoffmann118 in 1972. Upon reaction of 206.a with diiron nonacarbonyl, the vinylketene complex 207 was isolated in low yield. The analogous bromide and iodide substrates formed the 77-allyl complexes 208, although a trace of 207 was isolated from the reaction of the bromide 206.b. 

Cycloproparenes do not form metal complexes with all transition metals. Reaction of cyclopropabenzene with diiron-nonacarbonyl yields polymer, while reaction with cyclopropanaphthalene leads to a stable product formed by metal and carbonyl insertion. Attempts to form cycloproparene-chromium complexes have also failed. ... 

In several cases thietane derivatives have been used as ligands in organo-metallic compounds. Stable enolate complexes have been derived from tetra-methyl-3-thietanone and diiron nonacarbonyl. Both compounds were heated in n-hexane at 60°C in an argon atmosphere for longer periods of... 

The rearrangement occurs via the intermediate formation of 3-vinylcyclobutencs, which may be isolated, e.g. after treatment of the dichloro compounds with (nonacarbonyl)diiron, (nonacarbonyl)dicobalt or ethene[bis(triphenylphosphane)]nickel at room temperature.83 The straightforward method, however, seems to include both dechlorination and rearrangement, both reactions being promoted by (tetracarbonyl)nickel. 

Various substituted silacyclopentadienes react with iron or cobalt carbonyl compounds to give stable i 4-silacyclopentadiene complexes. Thus, with iron pentacarbonyl, reaction occurs at 150°-200° in an autoclave, with Fe2(CO)9 at 40°-60°, and with Fe3(CO)12 at 80° (20, 21, 49, 132) the same complex can be obtained from a dibromosilacyclopen-tene and diiron nonacarbonyl, under mild conditions (19) ... 

Heating trimethylsilylcyclooctatetraene with diiron nonacarbonyl yields both mono- and bis(irontricarbonyl) derivatives. Further heating of the monoiron derivative at 160° in a sealed tube results in transannular cyclization, to give the bicyclic isomer (36, 37) ... 

Diiron nonacarbonyl is available from Alpha Inorganics, Inc., or Strem Chemicals, Inc. The submitters made the complex through photolysis of iron pentacarbonyl by the method of King.4 Procedures for preparation are also given by E. H. Braye and W. Hubei, Inorg. Syn., 8, 178 (1966), in which the name diiron enneacarbonyl is used. 

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