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'UV' in keywords Facet   Publication Year 1978  [X]
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1978[X]
1Author    Egon Fahr, Georg Ph, Roth, Peter WüstenfeldRequires cookie*
 Title    Die gas-chromatographische Untersuchung der bei der UV-Bestrahlung von Uracil und Thymin in Lösung und in der Eismatrix gebildeten Produkte* Gas-chromatographic Investigation of Products Formed by UV Irradiation of Uracil and Thymine in Solution and Ice Matrix  
 Abstract    By g£is-chromatographic analysis of products prepared by UV irradiation of uracil in water, acetonitrile or ice matrix resp. of thymine in actonitrile could be demonstrated, that in all cases all four cyclobutane dimers are formed. 
  Reference    Z. Naturforsch. 33b, 646—651 (1978); eingegangen am 6. Dezember 1977 
  Published    1978 
  Keywords    UV, Uracil, Thymine 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0646.pdf 
 Identifier    ZNB-1978-33b-0646 
 Volume    33 
2Author    Tetraphenylphosphonium-Isopolymolybdates, Roger Grase, Joachim FuchsRequires cookie*
 Title    Über Tetraphenylphosphonium-Isopolymolybdate  
 Abstract    From acidified sodium molybdate solutions mixtures of two polymolybdates are precipitated by addition of tetraphenylphosphonium ions. The pure compounds obtainable by separation with selective organic solvents were identified analytically and by their vibrational spectra as octamolybdate, [P(C6Hs)4]4Mo8026, with "Lindqvist structure" and as hexamolybdate, [P(C6Hs)4Mo60i9. They are characterized by their UV-VIS spectra and X-ray powder patterns. The precipitation of the hexamolybdate from strong acidic solution can be used analytically for the determination of molybdenum. 
  Reference    Z. Naturforsch. 33b, 533—536 (1978); eingegangen am 20. Januar 1978 
  Published    1978 
  Keywords    Isopolymolybdates, Preparation, Vibrational Spectra, X-ray, UV 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0533.pdf 
 Identifier    ZNB-1978-33b-0533 
 Volume    33 
3Author    Latif Rateb, B. Azmy, M. A. Nashed, M. F. IskanderRequires cookie*
 Title      
 Abstract    A series of benzoylacetaldehyde benzoylhydrazones were prepared and characterised. Their UV, IR, and iH NMR spectra suggest the enol-imine structure rather than the keto-imine form of analogous Schiff bases. The pKa values of these aroylhydrazones were also measured and correlated with the Hammet substitution constants. Attempted cyclizations of these open-chain aroylhydrazones afforded the corresponding 5-hydroxy-2-pyrazoline compounds rather than the expected pyrazoles. 
  Reference    Z. Naturforsch. 33b, 1527—1534 (1978); received July 24 1978 
  Published    1978 
  Keywords    Benzoylacetaldehyde Benzoylhydrazone, 5-Hydroxy-2-pyrazolines, UV, Tautomerism, Enol-imines 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-1527.pdf 
 Identifier    ZNB-1978-33b-1527 
 Volume    33