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'CD Spectra' in keywords Facet   Publication Year 1981  [X]
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1Author    DevinderK. Anand, MichaelK. Hargreaves, MohsinA. KhanRequires cookie*
 Title    Conformational Studies of R-(-f)-2-Alkylidene-and R-(—)-2-Benzylidene-5-methylcyclohexanones  
 Abstract    The eis and trans 2-alkylidene-5-methylcyclohexanones have been separated and distinguished. 2-Benzylidene-5-methylcyclohexanone was also prepared in both forms. The CD, ORD, UV and IR spectra are recorded and discussed. The NMR data include solvent and temperature effects. 
  Reference    Z. Naturforsch. 36b, 978—988 (1981); received December 1 1980/April 8 1981 
  Published    1981 
  Keywords    2-Alkyl/arylidene-5-methylcyclohexanones, CD Spectra, ORD Spectra, NMR Spectra 
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 TEI-XML for    default:Reihe_B/36/ZNB-1981-36b-0978.pdf 
 Identifier    ZNB-1981-36b-0978 
 Volume    36 
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