Iron pentacarbonyl structure

UFPs of the Fe-N system can be synthesized from iron pentacarbonyl Fe(CO)s] and NH3 as reactants by a IOOO-W continuous wave C02 laser irradiation. The NH, gas is the absorbent of the laser beam in this case. At the lower synthesis temperature, below 650°C, UFPs of y -Fe4N with particle size of 10-25 nm grew dominantly. Above 1150°C, however, the growth of y-Fe UFPs with larger particle size of 30-100 nm was predominant (73). Iron carbonitride (lCN) UFPs were also synthesized from the ternary reactants of Fe(CO)s, NH3, and C2H i. The structure oflCN UFPs was hexagonal with e-Fe3(N,C) phase. A large saturation magnetization up to 142 emu/g was obtained and was ascribed to the carbon layer on 1CN UFPs (74). 

An interesting compound is formed in the reaction of dimethyl-bis(cyclopentadienyl)silane with iron pentacarbonyl, in refluxing octane [its structure was confirmed by X-ray diffraction (/6i)] ... 

A remarkable cationic iron carbonyl is formed by the reaction of iron pentacarbonyl with chloro or bromo azide, [Fe2(CO)4(N3)2]2+ (180). This cation has the highest recorded paramagnetism for a metal carbonyl of 5.29 /xB. A planar (D2f,) structure is proposed the azido groups are bridging and the carbonyls are terminal. 

Although nickel tetracarbonyl, iron pentacarbonyl, and diiron enneacarbonyl were already prepared in the 1890s, more than three decades passed before the chemistry of transition metal carbonyls took off. Undoubtedly, some parts of the chemical community had recognized that compounds such as Ni(CO)4 and Fe(CO)5 deserved special attention, in particular due to the use of Ni(CO)4 for the production of pure metallic nickel. However, since the structure of those compounds was unknown, transition metal carbonyls remained, more or less, a curiosity. 

Iron pentacarbonyl is adsorbed by metallic iron.3 The fact that the halogens decompose the pentacarbonyl, yielding ferrous salts, apparently suggests that the iron is merely divalent in the carbonyl. If so, the structural formula is presumably 4... 

Iron Pentacarbonyl. In its reactions with liquid dinitrogen tetroxide this compound follows the pattern outlined above, and the remarks on reactions of nickel carbonyl probably apply here also. The solvate, Fe(N03)3.N204, is produced (4). This has the structure N0+[Fe(N03)4] in the solid state it is volatile without decomposition, and is believed to be a five-coordinate complex, Fe(N0)(N03)4, in the vapor state. We have not yet succeeded in isolating the simple trinitrate, Fe(N03)3, by removal of N2O4. 

Cookson and co-workers treated norbornadiene with diiron nonacarbonyl in the dark and isolated five ketones and four dimeric hydrocarbons. The highest-melting dimer, m.p. 163-164°, was isolated easily in 4% yield because it is the first component eluted from a column of silica gel. Lemal and Shim isolated the same dimer from a complex mixture resulting on irradiation of a mixture of norbornadiene and iron pentacarbonyl. Initial characterization excluding alternative structures indicates... 

Iron Pentacarbonyl The structure of Fe(CO)s was first described37 in space group Cc, with four molecules per unit cell. The higher space group was rejected on the grounds that the molecule could not be centric. It was soon thereafter noticed38 that, within experimental error, the molecule does contain a twofold axis, and the structure was satisfactorily refined in C2/c. 

The neutral Ni[S2C2Ph2]o (3) reacts with iron pentacarbonyl to produce 33 (21), To prove the structure of the l,4-S-dialkyl(stilbenedithio-lato)-Ni(II) complex by the reaction with Fe(CO)5, a complex (36) of composition Ph2C2SFe2(CO)6 was obtained (Equation 11) (22) ... 

Photolysis of the phosphine (30) with iron pentacarbonyl in THF afforded (31) in 40% yield <83CB1923>. The structure of (31) was determined by x-ray crystallography. Oxidative decomposition of (31) with cerium(IV) or oxygen gave the free phosphepin oxide (32). 

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