Tris iron

Iron, trinitrato(dinitrogen tetroxide)-structure, 1,28 Iron, tris(acetylacetone)-electron recording system, 6,127 structure, 1, 65 Iron, tris(bipyridyl)-... 

Iron, tris(hexafluoroacetylacetone)-structure, 1,65 Iron, tris(oxalato)-chemical actinometer, 1,409 photoreduction, 1,471 relief-image-forming systems, 6,125 Iron, tris(l,10-phenanthroline)-absorptiometry, 1,549 racemization, 1,466 solid state, 1,467 structure, 1, 64 lron(III) chloride amino acid formation prebiotic systems, 6,871 Iron complexes acetonitrile. 4,1210 acetylacetone, 2,371 amidines... 

The first of the coprogens (fungal sideramines ) was reported in 1973. Neocoprogen I (280) and neocoprogen II (281) are linear tris-hydroxamate siderophores whose chelating groups are derived from A -hydroxy-A -acylated ornithines. Neocoprogen I is the first structurally established example of a irons tris-hydroxamate siderophore. Subsequent studies have dealt with... 

Johnson RM, Fraser CL. Iron tris(bipyridine)-centered star block copolymers chelation of triblock macroligands generated by ROP and ATRP. Macromolecules 2004 37 2718-2727. 

The results published thereafter by Kochi s group are especially interesting from a mechanistic point of view . Indeed, for preparative chemistry the yields are not satisfactory and the reaction is limited to reactive alkenyl bromides such as propenyl and styryl bromides (Table 4). Neumann and Kochi were the first to replace iron(III) chloride by iron(III) acetylacetonate or related complexes such as Fe(dbm)3 (iron tris-dibenzoylmethanato) that are less hygroscopic and easier to handle. 

The ionic alkali metal or ammonium salts of 1,2,3-(OHC)3H2Cs and l,2,3-/l,2,4-(NC)3H2Cj as well as (NC)4HC5 and (NC)5Cj are known (28,29). Furthermore, ionic N-bonded manganese, rhenium, and iron tri-cyano- and pentacyano-Cp s (30) as well as silver tricyanocyclopentadien-ides have been mentioned (28). However, we are not aware of tr-bonded (or pentahapto) metal complexes with these systems. 

Cyclobutadiene-iron tricarbonyl is prepared through reaction of S,4-dichlorocydolmtene and diiron enneacarbonyl. In an analogous manner, one can prepare 1,2-diphenyl- 1,2,3,4-tetramethyl- and benzocyclobutadiene-iron tri-carbonyl complexes. Cyclobutadiene-iron tricarbonyl is aromatic" in the sense that it undergoes facile attack by electrophilic reagents to produce monosubstituted cydo-butadiene-iron tricarbonyl complexes. Functional groups in the substituents display many of their normal chemical reactions which can be used to prepare further types of substituted cyclobutadiene-iron tricarbonyl complexes. 

The product has appreciable solubility in dichloromethane and more limited solubility in both benzene and pyridine. The Mossbauer spectrum and electronic spectrum of this clathrochelate are similar to those of other iron tri(glyoxime) cages.2 The compounds show an intense absorption band at 22,200 cm 1(e = 17,900). Several dominant bands in the infrared spectrum along with their proposed assignments are 1589 cm"1 (C=N stretch) 1495 cm"1 (C—Cand C=N stretch) 1234 and 1064 cm"1 (N—O stretch), and 1209 cm"1 (B—O stretch).3 In dichloromethane-d2, the pmr spectrum consists of two unresolved triplets (relative area = 24) at 1.78 and 2.91 ppm downfield from internal TMS and two multiplets (relative area 10.3) at 7.3 and 7.7 ppm downfield.3 The two multiplets are strikingly similar to that observed in the spectrum of phenyl-... 

Diiodosamarium induced an intramolecular Barbier reaction, under mild conditions (room temperature), in the presence of a catalytic amount of iron tris(dibenzoylomethane [Fe(DBM)3]. In this way many bicyclic tertiary alcohols were prepared. These conditions were also convenient for the cyclization... 

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