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1981 (1)
1979 (1)
1Author    Z. NaturforschRequires cookie*
 Title    Über die Darstellung sowie Elektronen-und CD-Spektren der Co(I)-Form einiger natürlicher Corrinoide  
 Abstract    Synthesis and S pectra (E lectronic, C D) o f the C o(I) F o rm o f Several N atu ra l C orrinoids M atthäus M oskophidis Several natural corrinoids, cobalam in, 5-hydroxybenzim idazolyl cobam ide (factor III), adenyl cobam ide (pseudovitam in Bi2), 2-m ethyladenyl cobam ide (factor A) and cobyric acid, were reduc­ ed with sodium borohydride. The reduction o f cyanocobalam in is slow as com pared with that o f factor III and especially o f the other corrinoids under study. At longer wavelengths (A > 300 nm) the electronic spectra o f the Co(I)-corrinoids are nearly identical. The same is to say about the CD-spectra o f the Co(I)-corrinoids examined. 
  Reference    Z. Naturforsch. 34c, 689 (1979); eingegangen am 19. Februar/9. April 1979 
  Published    1979 
  Keywords    Vitamin B12, B12-Analogues, Co(I)-corrinoids, Electronic Spectra, CD-Spectra 
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 TEI-XML for    default:Reihe_C/34/ZNC-1979-34c-0689.pdf 
 Identifier    ZNC-1979-34c-0689 
 Volume    34 
2Author    Z. NaturforschRequires cookie*
 Title    Coa/Coß-Isomerie der am Kobalt methylierten Corrinoide. Über die CD-und ORD-Spektren einiger Isomerenpaare  
 Abstract    The CD and ORD spectra o f the Coar-and Co/?-methyl isomers o f cobalamin, 2-methylthio-adenyl cobamide (factor S), cobyric acid and /?-kresyl cobamide (factor lb) were recorded in water and acidic solution. In complete and incomplete (nucleotide free) (Coar-methyl)-corrinoids the axial ligands CH3 and HzO are unalterable (fixed) within a wide range o f pH (about 1 to 12) at room temperature in the dark. Thus the spectra in this pH range are constant at X > 350 nm; spectral differences at X < 350 nm are effects of the nucleotide bases. The spectra o f complete "base-on" (Co/?-methyl)-corrinoids are, like the spectra of (Coa-methyl)-corrinoids, at X > 350 nm not dependent on the nucleotide base. If the nucleotide base is not coordinated ("base-off'), the spectra change strikingly and at X > 350 nm are nearly identical with those o f incomplete corrinoids e. g. cobyric acid. 
  Reference    Z. Naturforsch. 36c, 497 (1981); eingegangen am 16. Oktober 1980/25. Februar 1981 
  Published    1981 
  Keywords    gewidmet Vitamin B12, Methyl Corrinoids, Coa/Co/?-Isomerism, CD Spectra, ORD Spectra 
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 TEI-XML for    default:Reihe_C/36/ZNC-1981-36c-0497.pdf 
 Identifier    ZNC-1981-36c-0497 
 Volume    36