Iron compounds synthesis

Tavakoli, A., Sohrabi, M. and Kargari, A. (2007) A review of methods for synthesis of nanostructured metals with emphasis on iron compounds. Chemical Papers,... 

The starting material for the synthesis was the iron compound of deuteroporphyrin in which c and d = H. By means of the Friedel-Crafts reaction (SnCl4 in place of A1C13), acetyl groups were introduced at c and d, the diketone formed was reduced to the glycol (haemato-porphyrin, c and d = CHOH.CHs), and the latter converted into protoporphyrin with elimination of water. 

Oligo- and polymethylene-bridged complexes can be prepared by reaction of metal carbonyl anions with w.w -dihaloalkanes. This method proved to be a simple entry to the iron series /j,-(CH2)j.][(t75-C5H5) Fe(CO)2]2 (x s 3) (283), but yielded quite different products in the case of Na[(T 5-C5H5)Mo(CO)3] (283) and Na[Mn(CO)s] (284). An alternative two-step synthesis of the iron compounds involves the preparation of the mononuclear w-haloalkyls LXM—(CH2)X—X, and a subsequent... 

In order to understand catalytic systems based on iron, the chemistry of organoiron complexes is briefly described and their reactivity is demonstrated. A comprehensive summary of the applications of iron compounds in organic synthesis has been given by Pearson [7]. 

A. J. Pearson, Iron Compounds in Organic Synthesis, Academic Press, London, 1994. 

Dithiocarbamates, in Ru and Os half-sandwiches, 6, 493 Dithiocarbenes, Pt complexes, 8, 439 Dithiocarboxy ligands, in molybdenum carbonyls, 5, 447 Dithiolate-bridged compounds in dinuclear iron compounds with Fe-Fe bonds, 6, 238 as iron-only hydrogenase biomimetic models, 6, 239 Dithiolate diamides, with Zr(IV), 4, 784 Dithiolene—uranium complexes, synthesis and characterization, 4, 212 Ditopic receptors, characteristics, 12, 489 Ditungsten complexes, associated reactions, 5, 748 Divinyllead diacetates... 

Reviews a) A. J. Pearson, Iron Compounds in Organic Synthesis, Academic Press, London, 1994, chapter 4 b) L. S. Hegedus, Transition Metals in... 

The structurally related bright-red crystalline iron compound [Fe2(PF3)6(/i-PF2)2] has been obtained by Timms by metal vapor synthesis (method B) in which iron atoms and PF3 are cocondensed at liquid nitrogen temperature (340, 341). A similar reaction using cobalt... 

Ironically, the synthesis and chemiluminescent properties of some of these important compounds were first reported in the 1920s i.e., acridine-9-carboxylic acid, a precursor of acridinium esters, was synthesized in 1928 (L7), which was the same year that Albrecht described the chemiluminescence of luminol (A8). The emission from lucigenin, a 6is-acridinium analog, was reported 7 years later by Gleu and Petsch (G7). 

The conditions for the synthesis must differ, as the electronic configuration of each metal changes, but the intermediate in each case probably is a complex in which acetylene and carbon monoxide are each linked to two metal atoms. Cobalt and iron compounds having both acetylene and carbonyl bridges have already been synthesized 27). The report of the preparation of a dimeric nickel hydrocarbonyl, [NiH(CO)a]2 by Behrens 28) may well lead to the isolation of a siipilar acetylene complex with nickel. 

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