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1Author    Z. A. Fokina, V. I. Pekhnyo, S. V. Volkov, V. F. Lapko, Y. V. Bryukhova, S. I. KuznetsovRequires cookie*
 Title    Cl NQR Spectra of Some New Iridium Chlorochalcogenide Complexes  
 Abstract    The 35C1 N Q R spectra of the chlorochalcogenide complexes of iridium (SC13)2 [IrCl6] 1, (TeCl3)2 [IrCl6] 2, (SeCl3) [IrCl6] 3, [IrC l^ S C l,)^ 4, (SC13) [IrCl4(SCl2)2] 5 and [IrCl3(SeCl2)2]2 6 have been studied. The spectra were recorded by pulse spectrometry. They consist of two mul tiplets, widely separated in frequency. The high-frequency multiplet belongs to the chlorine atom s bonded to sulfur, selenium and tellurium, respectively, in the ligand. A high-frequency shift is observed, which is typical for the coordination of the molecules AC12(A = S, Se) and AC14(A = S, Se, Te). The low frequencies in the multiplets o f 4 and 6 are attributed to addition­ al bonds formed between chalcogen atom and chlorine in the coordination environment of iridium. In the spectral region 18-24 MHz lie the N Q R frequencies of 35C1 bonded to iridium. For 2 the frequencies are close to those of [IrCl6]2-, which confirms the Ir oxidation state IV. The unexpectedly high frequencies for Ir111 in the case of 4 and 5 are explained by the influence of AC12 molecules, which are weaker er-donors than the chloro ligands. This prom otes electron density transfer from neighbouring chlorine atoms. The 18 M Hz frequency is assigned to the bridge chlorine atoms in dimeric molecule 4. This assignment is confirmed by the positive value of d v /d T = +0,2. 
  Reference    Z. Naturforsch. 48b, 986—990 (1993); received July 14 1992 
  Published    1993 
  Keywords    Iridium (III, IV ), Chlorochalcogenide Complexes, Synthesis, N Q R Spectra 
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 TEI-XML for    default:Reihe_B/48/ZNB-1993-48b-0986.pdf 
 Identifier    ZNB-1993-48b-0986 
 Volume    48 
2Author    H. Hillebrecht, G. Thiele, P. Hollm, Ann, W. PreetzRequires cookie*
 Title    Darstellung, Charakterisierung und Normalkoordinatenanalyse von gemischtvalentem Dodekabromotriplatinat(IV,II,IV) [Pt3Br12]2~ und Kristallstruktur von (Ph3P =N =P P h3)2[Pt3Br12] * 2 CH2C12 Preparation, Characterization and Norm al Coordinate Analysis o f the Mixed Valence Dodecabrom otriplatinat(IV ,II,IV ) [Pt3Br12]2~ and Crystal Structure of (Ph3P = N = PPh3)2[Pt3Br 12] * 2 C H 2C12  
 Abstract    Heating a mixture (2:1) o f the tetrabutylammonium salts (TBA^JPtBrJ and (T B A)2[PtBr4] with trifluoroacetic acid leads to the mixed valence dodecabromotriplatinate(IV,II,IV) (T B A)2[Pt3Br12], The X-ray structure determination o f (Ph3P = N = PPh3)2[Pt3Br12] • 2C H 2C12 (triclinic, P 1, Z = 1) shows trinuclear groups with nearly D 2h symmetry for the anions, formed o f two PtBr6 octahedra and one planar PtBr4 group sharing edges. U sing the structural data a normal coordinate analysis based on a general valence force field for [Pt3Br12]2-has been per­ formed, which gives good agreement o f the calculated frequencies with the bands observed in the IR and Raman spectra. 
  Reference    Z. Naturforsch. 47b, 1099—1104 (1992); eingegangen am 10. Februar 1992 
  Published    1992 
  Keywords    Dodecabrom otriplatinate(IV, II, IV), M ixed-Valence C om pound, Synthesis, Crystal Structure, Raman Spectra 
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 TEI-XML for    default:Reihe_B/47/ZNB-1992-47b-1099.pdf 
 Identifier    ZNB-1992-47b-1099 
 Volume    47 
3Author    Fritz Preuss, M. Artina, Steidel, Reiner ExnerRequires cookie*
 Title    Tris(te/*f-butoxo)silylthiolato-Komplexe des Vanadiums(V, IV, III) Tris(/<?r?-butoxo)silylthiolato Complexes of Vanadium(V, IV, III)  
 Abstract    Tris(te/7-butoxo)silylthiolato Com plexes o f Vanadium(V. 
  Reference    Z. Naturforsch. 45b, 1618—1624 (1990); eingegangen am 17. Mai 1990 
  Published    1990 
  Keywords    IV, III), Preparation, N M R Spectra, ESR Spectra, X-Ray Structure Determination 
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 TEI-XML for    default:Reihe_B/45/ZNB-1990-45b-1618.pdf 
 Identifier    ZNB-1990-45b-1618 
 Volume    45