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1981 (1)
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1978 (1)
1Author    Heinrich Homborg, Winfried KalzRequires cookie*
 Title    Darstellung von Phthalocyaninen von Ib-Elementen in aprotischen Lösungsmitteln Preparation of Phthalocyanines of lb-Elements in Aprotic Solvents  
 Abstract    The double decomposition of (TDBA)LiPc(2-) with halocomplexes of the lb-elements is investigated in nonpolar aprotic solvents. Phthalocyanines of the formula MLiPc(2-) are isolated only for the univalent cations Cu(I) and Ag(I), but not for Au(I). The impure AgLiPc(2-) is light sensitive. In contrast to earlier observations only oxidation products of the phthalocyanine anion are obtained in the presence of Cu(II) and Au(III). The preparation of Ag(II) and Au(II) phthalocyanines failed. Abkürzungen: TBA+ = w-Tetrabutylammonium, [(C4H9)4N]+, TDBA+ = n-(Tridodecyl-butyl)ammonium, [(Cl2H25)3C4H9N]+, Pc(2-) = Phthalocyanin(2-), [C32HI6N8] 2 -, Pc(l-) = Phthalocyanin(l-), 
  Reference    Z. Naturforsch. 33b, 1063—1066 (1978); eingegangen am 29. Juni/31. Juli 1978 
  Published    1978 
  Keywords    Phthalocyanine, Copper(I), Silver(I), UV-VIS, Vibrational Spectra 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-1063.pdf 
 Identifier    ZNB-1978-33b-1063 
 Volume    33 
2Author    Rainer Bieganowski, Wilhelm FriedrichRequires cookie*
 Title    Über die Eisenanaloga von Cobalamin und Cobyrsäure* About the Iron Analogues of Cobalamin and Cobyric Acid  
  Reference    Z. Naturforsch. 36c, 9 (1981); eingegangen am 15. Septem ber 1980 
  Published    1981 
  Keywords    Vitamin B12, Cobyric Acid, Fe(III)Cobalam in, Fe(III)Cobyric Acid, Iron-B12-Analogues, UV/VIS-, NMR-, ESR-Spectra 
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 TEI-XML for    default:Reihe_C/36/ZNC-1981-36c-0009.pdf 
 Identifier    ZNC-1981-36c-0009 
 Volume    36 
3Author    Heinz Falk, Klaus ThirringRequires cookie*
 Title    On the Chemistry of Pyrrole Pigments, XXXIV [1] On the Configurations and Conformations of Diastereomeric N-Methyl-O-methyl-bilatrienes-abc  
 Abstract    of the aetiobiliverdin-IV-y-lactimether yields a lactam-N-methylated derivative the structure of which was proven by an ether cleavage and iH NMR spectro-scopy. The configuration (Z,Z,Z) was deduced from iHNMR experiments. Photo-isomerization exclusively forms the (E,Z,Z) diastereomer. By conformational analysis using the LIS technique and correlations of UV-VIS spectra and PPP-type calculations a more or less helical arrangement for the two diastereomers was confirmed. The twisting is maximal at the methine single bond adjacent to the site of N-methylation, the overall geometry seems to be much more distorted than the non methylated derivatives. 
  Reference    Z. Naturforsch. 34b, 1600—1605 (1979); eingegangen am 13. Juli 1979 
  Published    1979 
  Keywords    X H NMR, UV-VIS, Lanthanide Ion Induced Shifts, PPP-Calculations, Conformational Analysis Methylation 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-1600.pdf 
 Identifier    ZNB-1979-34b-1600 
 Volume    34