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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