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1Author    T. E. Fräser, H.-J Füller, H. SchmidbaurRequires cookie*
 Title    Einige neue Iridium-Komplexe von Phosphor-yliden Some New Iridium Complexes of Phosphorus Ylides  
 Abstract    From the iridium complexes [(l,5-C8Hi2)IrCl]2, [(C8H14)2IrCl]2 and [(C6H5)3P]2lr(CO)Cl, and the ylides (CH3)3P = CH2 and (CH3)3P = N-P(CH3)2 = CH2, a number of organoiridium compounds has been synthesized. Whereas with (CH3)3P = CH2 the transylidation reaction is very slow and simple addition with formation of sparingly soluble products prevails, the double ylide forms cyclic complexes quite readily. These ylide chelates were characterized by analytical and spectroscopic data. 
  Reference    Z. Naturforsch. 34b, 1218—1220 (1979); eingegangen am 18. Juni 1979 
  Published    1979 
  Keywords    Ylide Complexes, Phosphorus Ylides, Iridium Complexes, Organoiridium Compounds 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-1218.pdf 
 Identifier    ZNB-1979-34b-1218 
 Volume    34 
2Author    Ertugrul Arpac, Lutz DahlenburgRequires cookie*
 Title    Oligophosphin-Liganden, III [1] Bis(3-diphenylphosphinopropyl)phenylphospbinchloroiridium(I) * * und dessen Carbonyl-und Hydridderivate Oligophosphine Ligands, III [1] Bis(3-diphenylphosphinopropyl)phenylphosphinechloroiridium(I) and its Carbonyl and Hydride Derivatives  
 Abstract    The title complex, IrCl(bdpp) (1), where bdpp = PhP[(CH2)3PPh2]2, has been obtained from [IrCl(C8Hi4)2]2 and the triphosphine ligand. Characteristic 31 P NMR data of 1 dissolved in THF are <5(PPh2) = 2.7 and <3(PPh) = —19.9 with cis-2 J(PIrP) = 32.8 Hz. Reaction of 1 with CO proceeds stepwise to yield five-coordinate IrCl(CO)(bdpp) (2) and ionic [Ir(CO)2(bdpp)]Cl (3). A trigonal bipyramidal geometry with equatorial CO ligands is assigned to the cation of 3 on the basis of its v(CO) infrared intensities. When allowed to react with HCl, 1 gives the monohydride IrHCl2(bdpp) (4). Similarly, the dihydride IrH2Cl(bdpp) (5) is formed from 1 and H2. As has been established by IR and NMR spectroscopy, 4 and 5 adopt cis-wer-octahedral structures. 
  Reference    Z. Naturforsch. 36b, 672—676 (1981); eingegangen am 9. März 1981 
  Published    1981 
  Keywords    Bis(3-diphenylphosphinopropyl)phenylphosphine, Iridium Complexes, NMR Spectra 
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 TEI-XML for    default:Reihe_B/36/ZNB-1981-36b-0672.pdf 
 Identifier    ZNB-1981-36b-0672 
 Volume    36 
3Author    Markus Prem, Kurt Polbom, Wolfgang BeckRequires cookie*
 Title    Metallkomplexe mit biologisch wichtigen Liganden, C IX [1]. Metallorganische Verbindungen von Platin(II), Ruthenium(II), Rhodium (III) und Iridium (III) mit Oxocarbonyl-N-geschützten a-Am inosäuren und L-Methionylglycinat Metal Complexes with Biologically Important Ligands, CIX [1]. Organometallic Compounds o f Platinum(II), Ruthenium(II), Rhodium(III), and Iridium(III) with Oxocarbonyl-N-protected a-Amino Acids and L-Methionylglycinate  
 Abstract    The reaction o f m -(P h 3P)2PtCl2 with BOC-N-glycine and FMOC-N-alanine gives the carboxylate coordinated complexes as-(Ph3P)2Pt(Cl)(0 2CCH2N HB0 C) (1) and cis-(Ph3P)2Pt(C l)(02C C (H)(M e)N H FM 0C (2). Chloride and proton abstraction from 1 affords the N,Ö-chelate complex (Ph3P)2 P t(0 2C CH2N B 0C) (3). From the chloro-bridged compounds [Cp*MCl2] 2 (M = Rh, Ir), [(/?-cymene)RuCl2] 2 and BOC-N-L-MetGlyOH (L) the compounds Cp*M (Clj2L (4, 5) and (/?-cymene)Ru(Cl)2L (6) with the mono-dentate dipeptide are obtained which in the presence o f NaOMe form Ö,N,S-bis(chelate) complexes 7 -9 . The X-ray dif­ fraction analysis of the iridium 0,N,S chelate complex 8 shows a five membered and a seven membered chelate ring. 
  Reference    Z. Naturforsch. 53b, 1501—1505 (1998); eingegangen am 20. Juli 1998 
  Published    1998 
  Keywords    Platinum, Ruthenium, Rhodium, Iridium Complexes, L-Methionylglycine 
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 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-1501.pdf 
 Identifier    ZNB-1998-53b-1501 
 Volume    53 
4Author    Katharina Haas, Heinrich Nöth, Wolfgang Beck, *. Sonderdruckanforderungen, ProfW. Beck, HerrnRequires cookie*
 Title    Metallkomplexe mit biologisch wichtigen Liganden, CXX [1]. Halbsandwich-Komplexe von Ruthenium(II) und Iridium(III) mit 3-(3-Pyridyl)-D-alaninat Metal Complexes of Biologically Important Ligands, CXX [1]. Half Sandwich Complexes of Ruthenium(II) and Iridium(III) with R-3-(3-Pyridyl)-D-alaninate  
 Abstract    The reactions of the chloro bridged complexes [(/?-cymene)RuCl2]2 and [(C5Me5)IrCl2]2 with the anion of 3-(3-pyridyl)-D-alanine (L) afford the N,O-chelate complexes (p-cymene)-Ru(L)(Cl) (1) and (C5Me5)Ir(L)(Cl) (2). Abstraction of chloride from 1 and 2 using AgSbF6 gives the dimers [(p-cymene)Ru(^-L)2Ru(p-cymene)]2+(SbF6)2 (3) and [(C5Me5)Ir(/x-L)2-Ir(C5Me5)]2+(SbF6)2 (4) with coordination of the pyridine N atom. Complex 4 is formed in high diastereomeric excess. The structure of (C5Me5)Ir(^-L)2Ir(C5Me5)]Cl2 (5) which contains the SIrRcRc RIr diastereoisomer in the crystal was determined by X-ray diffraction. 
  Reference    Z. Naturforsch. 54b, 989—992 (1999); eingegangen am 23. April 1999 
  Published    1999 
  Keywords    Ruthenium, Iridium Complexes, 3-(3-Pyridyl)alanine 
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 TEI-XML for    default:Reihe_B/54/ZNB-1999-54b-0989.pdf 
 Identifier    ZNB-1999-54b-0989 
 Volume    54 
5Author    Yuanlin Zhou, Barbara Wagner, Kurt Polborn, Karlheinz Sünkel, Wolfgang BeckRequires cookie*
 Title    Metallkomplexe mit biologisch wichtigen Liganden, LXXIII [1] Komplexe von Palladium(II), Platin(II), Rhodium(III) und Iridium(III) mit N-6-Deoxy-galactopyranosyl-«-Aminosäuren Metal Complexes with Biologically Im portant Ligands, LXXIII [1] Organometallic Compounds of Palladium(II), Platinum (II), R hodium (III) and Iridium (III) with N-6-Deoxy-galactopyranosyl-a-amino Acids  
 Abstract    A series of complexes with anions of N -[l,2:3,4-di-0-isopropylidene-6-deoxy-a-D -galacto-pvranos-6-vl]-a-aminoacids has been obtained and characterized by spectroscopic data: 
  Reference    Z. Naturforsch. 49b, 1193—1202 (1994); eingegangen am 24. Januar 1994 
  Published    1994 
  Keywords    Palladium, Platinum, Rhodium, Iridium Complexes, N-6-Deoxy-galactopyranosyl-a-aminoacidates 
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 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-1193.pdf 
 Identifier    ZNB-1994-49b-1193 
 Volume    49 
6Author    Kenta Takahashi, Keisuke Umakoshi, Akihiro Kikuchi, Yoichi Sasaki, Masato Tominaga, Isao TaniguchiRequires cookie*
 Abstract    New trinuclear rhodium(III) complexes, [Rh3(//3-0)(/i-CH3C00)6(L)3]+ (L = imidazole (Him), 1-methylimidazole (Meim), and 4-methylpyridine (Mepy)) have been prepared. The Him, Meim, and Mepy complexes show reversible one-electron oxidation waves at E1/2 = +1.12, +1.12, and +1.28 V vs Ag/AgCl, respectively, in acetonitrile. Electronic absorption spectra of the one electron oxidized species of these complexes and [Rh3(M3-0)(M-CH3C 0 0)6(py)3]+ (py = pyridine) (E 1 /2 = +1.32 V) were obtained by spectroelectrochemical techniques. While the Rh3(III,III,III) states show no strong visible absorption, the Rh3(III,III,IV) species give a band at ca. 700 nm (e = 3390-5540 mol dm" 3 cm" 1). [Ir3(«3-0)(//-CH3C00)6(py)3]+ with no strong absorption in the visible region, shows two reversible one-electron oxidation waves at +0.68 and +1.86 V in acetonitrile. The electronic absorption spectrum of the one-electron oxidized species (Ir3(III,III,IV)) also shows some absorption bands (688 nm (e, 5119), 1093 (2325) and 1400 (ca. 1800)). It is suggested that the oxidation removes an electron from the fully occupied anti-bonding orbital based on metal-d7r-/^3-0-pjr interactions, the absorption bands of the (III,III,IV) species being assigned to transitions to the a«r/-bonding orbital. esting because of their characteristic strong visible absorption and reversible multi-step redox behav­ iour [2-14]. It has been suggested that such char­ acteristic properties are associated with strong in-termetallic interactions through the central oxide bridge. The Ru(d^r)-^3 -0 (p jr) interaction is sig­ nificantly stronger than that of analogous tri­ nuclear complexes o f first row transition elements. The djr-pjr molecular orbitals shown in Fig. 1 have been proposed for the trinuclear ruthenium complexes [3,15,16], In the study of mixed ruthe-nium-rhodium complexes, it was suggested that a similar molecular orbital scheme should be appli­ cable to trirhodium and mixed ruthenium-rho-dium complexes [7]. Electronic states o f the oxo-centered triiridium (III) complexes [17,18] should also be considered in terms of the djr-pjr molec­ ular orbital scheme. Thus the oxo-centered tri­ metal complexes of heavy transition elements could be significantly different from those of first row transition elements with respect to the extent of metal-oxygen-metal interactions. The trinuclear 
  Reference    Z. Naturforsch. 50b, 551—557 (1995); received October 5 1994 
  Published    1995 
  Keywords    Trinuclear Complexes, Rhodium Complexes, Iridium Complexes, dn-ipji Interaction, Spectroelectrochemistry, Mixed Valence State 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-0551.pdf 
 Identifier    ZNB-1995-50b-0551 
 Volume    50