Iridium cyclopentadienyls

Methoxycarbonyl)chroman-3-one, arylation, 9, 394—395 Methoxycarbonyl groups, Ru and Os complexes, 6, 837 2-Methoxyestradiol, via iridium cyclopentadienyl complexes,... 

Mixed-sandwich complexes with cyclodextrins, 12, 787 iridium cyclopentadienyl complexes, 7, 368 with nickel, synthesis and reactivity, 8, 160 with vanadium, 5, 47... 

In the case of rhodium and iridium, cyclopentadienyl compounds for high oxidation states ( + 5) of the metals are known. These complexes, like rhodium(III) and iridium(III) compounds, with the pentamethylcyclopentadienyl ligand... 

Rhodium and Iridium.- Cyclopentadienyl stabilised dirhodium complexes include the... 

This net has vertex symbols 8 8-H and 8-8-8j and is thus a uniform net (having only one kind of shortest rings) with genus 5. It is formed by four-fold helices, well known by now, this lime interconnected by zigzag chains, see Figure 6.24 It is also chiral. An example can be found in the cyano-bridged iridium cyclopentadienyl silver(l)pyridinc compound in Figure 6.24 [31J. 

Reaction of the cyclopentadienyl rhodium and iridium tris(acetone) complexes with indole leads to the species 118 (M = Rh, Ir) [77JCS(D)1654 79JCS(D)1531]. None of these compounds deprotonates easily in acetone, but the iridium complex loses a proton in reaction with bases (Na2C03 in water, r-BuOK in acetone) to form the ri -indolyl complex 119. This reaction is easily reversed in the presence of small amounts of trifluoroacetic acid. 

The fourth chapter gives a comprehensive review about catalyzed hydroamina-tions of carbon carbon multiple bond systems from the beginning of this century to the state-of-the-art today. As was mentioned above, the direct - and whenever possible stereoselective - addition of amines to unsaturated hydrocarbons is one of the shortest routes to produce (chiral) amines. Provided that a catalyst of sufficient activity and stabihty can be found, this heterofunctionalization reaction could compete with classical substitution chemistry and is of high industrial interest. As the authors J. J. Bmnet and D. Neibecker show in their contribution, almost any transition metal salt has been subjected to this reaction and numerous reaction conditions were tested. However, although considerable progress has been made and enantios-electivites of 95% could be reached, all catalytic systems known to date suffer from low activity (TOP < 500 h ) or/and low stability. The most effective systems are represented by some iridium phosphine or cyclopentadienyl samarium complexes. 

The same catalyst has also been used for the reduction of aldehydes to primary alcohols [7]. Several other iridium W-heterocyclic carbene complexes have been shown to be successful as catalysts for the transfer hydrogenation of ketones [8-12], including the interesting complex 6, where the cyclopentadienyl ring is tethered to the 77-heterocyclic carbene. Complex 6 was employed at low catalyst loading for the reduction of a range of ketones including the conversion of cyclohexanone 11 into cyclohexanol 12 [13]. 

Iridium(I), stabilized by the ir-cyclopentadienyl anion, forms a stable, diamagnetic complex [Ir(C6H6)(C6Ht)] with cyclopentadiene (91) by the reaction ... 

BFJrP,Ci<,Hj6, Iridium(III), diaquadihy-dridobis(triphenylphosphine)-tetrafluoroborate(l -), 26 124 02BF4IrP2C4 H44, Iridium(III), bis-(acetone)-dihydridobis(triphenylphosphine)-tetrafluoroborate(l -), 26 123 02BF4MoPC25H2ii, Molybdenum, dicar-bonyl-(Tf-cyclopentadienyl)[tetra-fluoroborato(l - )](triphenyl-phospine)-, 26 98... 

F,SCH, Methanesulfonic acid, trifluoro-iridium, manganese and rhenium complexes, 26 114, 115, 120 platinum complex, 26 126 OiFeCgH, Iron, acetyl dicarbonyl (if -cyclopentadienyl)-, 26 239 0,FeN2C2 Hll(, Iron, tricarbonylbis(2-isocy-ano-l,3-dimethylbenzene)-, 26 54 0.iMoNaCHH5-2 C4H ,02, Molybdate 1 -), tricarbonyl(T) -cyclopentadienyl)-sodium, compd. with 1,2-dimethoxy-ethane-(l 2), 26 343 0,NaWC H5-2 C4H ,02, Tungstate(l -), tricarbonyl(ris-cyclopentadienyl)-... 

Iridium Carhonyl-iodo-(2-iodo-tetrafluoro-ethyl)-(t 5-pentame-thyl-cyclopentadienyl)- Xlll/9b. 528 [1 CF, -CF, —I + (COl.lrL]... 

Anthrylmethyl-functionalized cyclopentadienyl iridium complexes, synthesis, 7, 368-369 Antibacterial agents, discovery and characteristics, 1, 894 Antibiotics, via enyne metathesis, 11, 297-298 Anticancer compounds... 

Binding energy, pentacarbonyliron, 6, 3 Binuclear complexes bis-Cp titanium halides, 4, 522 with Ni-M and Ni-C cr-bonds heterometallic clusters, 8, 115 homometallic clusters, 8, 111 Binuclear dicarbonyl(cyclopentadienyl)hydridoiron complexes, with rand C5 ligands, 6, 178 Binuclear iridium hydrides, characteristics, 7, 410 Binuclear monoindenyl complexes, with Ti(IV), 4, 397 Binuclear nickel(I) carbonyl complexes, characteristics, 8, 13 Binuclear osmium compounds, with hydrocarbon bridges without M-M bonds, 6, 619... 

Bis(cyclooctene)—iridium(I) complexes, preparation, 7, 316 Bis(cyclopentadienyl) alkenes, with tantalum, 5, 157 Bis(cyclopentadienyl) alkyne niobium complexes, characteristics, 5, 81... 

Cyclopentadienyl hydrides, with niobium, 5, 69 Cyclopentadienyl iridium(III) nitrogen heterocycliccarbenes, preparation, 7, 350... 

Cyclopentadienylmetallaboranes, with iridium, 7, 380 Z /MYZ-Cyclopentadienyl—oxo complexes, with Zr(IV), 4, 866 Cyclopentadienyl phenoxides, with manganese, 5, 827-828 Cyclopentadienyl—phenoxo dichloro complexes, with Ti(IV), 4, 498-499... 

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