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'UV Vis Spectra' in keywords Facet   Publication Year 1990  [X]
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1Author    Horst Grünewald, Heiner HomborgRequires cookie*
 Title    Darstellung und spektroskopische Charakterisierung von Nitridophthalocyaninatomangan(V) Preparation and Spectroscopical Characterization of Nitridophthalocyaninatom anganese(V)  
 Abstract    Nitridophthalocyaninatomanganese(V), M nN Pc(2-), has been prepared by oxidation of [Mn(OH):Pc(2-)]~ with chlorine in the presence of excess ammonia in dichloromethane as a chemically very stable, diamagnetic microcrystalline blue powder. The band at 1053 cm 1 in the infrared and resonance Raman spectra is assigned to v(Mn=N). The strong resonance en­ hancement of v(Mn=N) coincides with an electronic transition at 461 nm assigned to (N —> Mn) electron transfer. The UV-VIS spectrum in 1-chloronaphthalene is compared with that of the M nN Pc(2-)-H -,S04 adduct and the phthalocyanine-7r-cation radical [MnNPc(l -) ] +. 
  Reference    Z. Naturforsch. 45b, 483—489 (1990); eingegangen am 30. November 1989 
  Published    1990 
  Keywords    Nitridophthalocyaninatomanganese(V), IR Spectra, Resonance Raman Spectra, UV-VIS Spectra 
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 TEI-XML for    default:Reihe_B/45/ZNB-1990-45b-0483.pdf 
 Identifier    ZNB-1990-45b-0483 
 Volume    45 
2Author    W. Preetz, P. Hollmann, G. Thiele, H. HillebrechtRequires cookie*
 Title    Darstellung, Reaktionen und spektroskopische Charakterisierung von |O s2X8|2", X = Cl, Br, I, und Kristallstruktur von (P P N )2|O s2I8| * 2 CH2C12 Preparation, Reactions and Spectroscopic Characterization of [Os2X 8]2-, X = Cl, Br, I, and Crystal Structure o f (PPN )2[Os2I8] ■ 2 C H 2C12  
 Abstract    The triply bonded octahalogenodiosm ate(III) anions [Os2X 8]2-, previously known with X = Cl, Br, have now been extended to include the iodide with two staggered OsI4 units. This com ­ pound was prepared by treating [Os2Cl8]2' with N al at room temperature in acetone solu­ tion. The structure determination by X-ray diffractometry on single crystals o f (P P N)2[Os2I8] • 2 C H 2C12, reveals crystallization in the m onoclinic system, space group P 2 ,/c with Z = 4. The O s~O s triple bond is with 2.212(1) Ä the longest within the three octahalogenodiosm ates(III). The Raman spectra show v(OsOs) at 285, [Os2Cl8]2-; at 287, [Os2Br8]2_ and for the iodo compound at 270.1 cm ' 1 with up to three overtones. The spectro­ scopic constants are calculated to be a», = 270.9 cm -1; X u = -0 .5 0 cm "1. The 10 K UV-VIS spectra o f solid [(/7-C4H9)4N ]2[Os2X 8] exhibit ö~n* transitions with maxima at 723, 690 and 643 nm, superimposed by vibrational fine structures with long progressions o f 195, 211 and 183 cm -1 for X = Cl, Br, I, respectively. Oxidation o f [Os2X 8]2~, X = Cl, Br with the corresponding halogen leads to the cleavage o f the O s -O s bond, and the dekahalogenodiosm ates(IV), [Os2X l0]2-, are formed. 
  Reference    Z. Naturforsch. 45b, 1416—1424 (1990); eingegangen am 12. März 1990 
  Published    1990 
  Keywords    O ctaiododiosm ate(III), Synthesis, Crystal Structure, Raman, UV-VIS Spectra 
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 TEI-XML for    default:Reihe_B/45/ZNB-1990-45b-1416.pdf 
 Identifier    ZNB-1990-45b-1416 
 Volume    45