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'X H NMR Spectra' in keywords
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1983 (2)
1981 (4)
1980 (2)
1Author    J. Schmitzer, K. Hustert, H. Parlar, F. KörteRequires cookie*
 Title    Zur Struktur von verbrückten Photoisomeren der Cyclodieninsektizide Structure of Bridged Photoisomers of Cyclodiene Insecticides  
 Abstract    Asymmetrically substituted chlorinated tetrahydro-4,7-methano-lH-indanes can be bridged photochemically into two types of isomerization products. These photoisomers can be distinguished on the basis of different geminal coupling constants in their X H NMR spectra. The structural assignment is not always certain, given only one photoisomer; it is unambiguous when both isomers are available. 
  Reference    Z. Naturforsch. 35b, 502—506 (1980); eingegangen am 10. Dezember 1979 
  Published    1980 
  Keywords    Cyclodiene Insecticides, Photoisomerization, X H NMR Spectra 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0502.pdf 
 Identifier    ZNB-1980-35b-0502 
 Volume    35 
2Author    Wilfried Peters, Gerhard HageleRequires cookie*
 Title    Kernresonanzspektroskopische Untersuchungen an Organophosphorverbindungen - Thiophosphorylbromide RR P(S)Br: R,R =CH3, C2H5, f-C3H7, t-C4H9 NMR Studies on Organophosphorous Compounds -Thiophosphorylbromides RR'P(S)Br  
 Abstract    NMR spectra of dialkylthiophosphoryl bromides RR'P(S)Br are analyzed. Methods are demonstrated for C2H5(t-C3H7)P(S)Br. A correlation between <53ip in the 31 P NMR spectra and the number of y3-methyl groups is discussed. 
  Reference    (Z. Naturforsch. 38b, 96—102 [1983]; eingegangen am 23. August 1982) 
  Published    1983 
  Keywords    Dialkylthiophosphoryl Bromides, NMR Spectra, X H NMR Spectra, 31 P NMR Spectra 
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 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-0096.pdf 
 Identifier    ZNB-1983-38b-0096 
 Volume    38 
3Author    Alicia Baldessari, EduardoG. GrosRequires cookie*
 Title    Synthesis of Some N-Alkylamino-N-vanillylpropionamides  
  Reference    Z. Naturforsch. 38b, 997—999 (1983); received April 11 1983 
  Published    1983 
  Keywords    N-Alkylamino-N-vanillylpropionamides, Synthesis, X H NMR Spectra, 13 C NMR Spectra 
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 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-0997.pdf 
 Identifier    ZNB-1983-38b-0997 
 Volume    38 
4Author    ViqarUddin Ahmad, Q. Najmus-Saqib, K. Usmanghani, W. Fuchs, W. VoelterRequires cookie*
 Title    New Triterpenoid from Primula denticulata  
 Abstract    From the alcoholic extract of the plant Primula denticulata four main compounds could be isolated by column chromatography: Pri-dentigenin A, B, C and D. Several spectroscopic methods and the synthesis of several derivatives allow to determine the structure of Pridenti-genin B. 
  Reference    Z. Naturforsch. 35b, 511—512 (1980); eingegangen am 27. Dezember 1979 
  Published    1980 
  Keywords    Triterpenoids, Primula denticulata, Structure Elucidation, X H NMR Spectra, 13 C NMR Spectra 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0511_n.pdf 
 Identifier    ZNB-1980-35b-0511_n 
 Volume    35 
5Author    Helmut Burdorf, Christoph EischenbroichRequires cookie*
 Title    Metall-rr-Komplexe yon Benzolderivaten, XIII [1] Bis(methylthio-/-beiizol)chrom(0) Darstellung und Einsatz als zweizähniger Chelatligand  
 Abstract    The thioanisole-7r-complexes (methylthio-^-benzene)-(^-benzene)-chromium (2) and bis(methylthio-r/-benzene)chromium (3) have been prepared via lithiation of bis(rj-benzene)-chromium and consecutive reaction with dimethyldisulfide. *H NMR and 13 C NMR spectra of 2 and 3 as well as ESR-spectra of the corresponding radical cations 2t and 3t were recorded and analyzed. In contrast to C(»?.arene)-Si and C(r/-arene)-P bonds, C(1/.arene)-S bonds are stable to solvolysis. With (norbornadiene)tetracarbonylmolybdenum, 3 readily forms [bis(methylthio-?j-benzene)chromium]tetracarbonylmolybdenum (6) wherein 3 functions as a chelating ligand. *H and 13 C NMR evidence suggests, that at room temperature 6 undergoes rapid conformational interconversions. 
  Reference    (Z. Naturforsch. 36b, 94—101 [1981]; eingegangen am 9. September 1980) 
  Published    1981 
  Keywords    Thioanisole Sandwich Complexes, X H NMR Spectra, 13 C NMR Spectra, ESR Spectra, Coordination Chemistry 
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 TEI-XML for    default:Reihe_B/36/ZNB-1981-36b-0094.pdf 
 Identifier    ZNB-1981-36b-0094 
 Volume    36 
6Author    PaavoH. Hynninen, Gunnel SieversRequires cookie*
 Title    Conformations of Chlorophylls a and a' and their Magnesium-Free Derivatives as Revealed by Circular Dichroism and Proton Magnetic Resonance  
 Abstract    The electronic absorption (UV/VIS), circular dichroism (CD) and proton magnetic resonance (*H NMR) spectra have been recorded for C-l0 epimeric chlorophylls a and a', pheophytins a and a' as well as pheophorbides a and a'. Although the epimers in each pair showed virtually identical UV/VIS spectra, their CD spectra were profoundly different and exhibited opposite signs at most wavelengths in the UV region. The differences were interpreted as arising, in part, from different C-10 configurations, and, in part, from conformational alterations induced by the steric strain in the crowded periphery of the macrocycle. The conformational alterations were also clearly indicated by the X H NMR zJö-values observed for the a,ß and <5 methine protons, the C-10 protons and most methyl group protons of the epimers in each pair. This was considered to imply changes in the geometry of the whole macrocycle. The A 6-values were larger for the Mg-free epimers than for the chlorophyll epimers, which shows that the central Mg-atom makes the macrocycle more rigid. Correlations between the signs of the CD bands and configurations are discussed. 
  Reference    Z. Naturforsch. 36b, 1000—1009 (1981); received May 19 1981 
  Published    1981 
  Keywords    Stereochemistry, Conformational Analysis, Chlorophyll and Pheophytin Epimers, X H NMR Spectra, Circular Dichroism 
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 TEI-XML for    default:Reihe_B/36/ZNB-1981-36b-1000.pdf 
 Identifier    ZNB-1981-36b-1000 
 Volume    36 
7Author    Brigitte Sarry, Rolf SchaffernichtRequires cookie*
 Title    Übergangsmetallbenz -in-Komplexe. Dynamisches Verhalten von [Ta(C6H5)4(C6H4)a(Li * OC4H10)3] Transition Metal Benzyne Complexes. Fluxional Behaviour of [TAFCEHSMCEKIMLI * OC4HI0)3]  
 Abstract    Products of the reaction between MBrs and PhLi are proved to be benzyne complexes [M(C6H5)4(CeH4)2(Li-OC4Hio)n], (M = Nb, Ta, W). Analysis of the temperature dependent 1 H and 7 Li NMR Spectra of [TafCeHsMCeH^fLi • OCjHiob] are interpreted on the basis of square antiprismatic/dodecahedral structure with facial CeH4 groups. 
  Reference    Z. Naturforsch. 36b, 1238—1243 (1981); eingegangen am 30. April 1981 
  Published    1981 
  Keywords    Benzyne Transition Metal Complexes, X H NMR Spectra, 7 Li NMR Spectra, Fluxional Behaviour 
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 TEI-XML for    default:Reihe_B/36/ZNB-1981-36b-1238.pdf 
 Identifier    ZNB-1981-36b-1238 
 Volume    36 
8Author    Jochen Ellermann, Martin LietzRequires cookie*
 Title    Chemie polyfunktioneller Liganden, 69 [1] Über drei Organo-Arsen-Käfigverbindungen mit Noradamantanstruktur Chemistry of Polyfunctional Ligands, 69 [1] Three Organo-Arsenic Cage Compounds with Noradamantane Structure  
 Abstract    The reaction of l.l.l-tris(diiodarsinomethyl)ethane, CH3C(CH2Asl2)3 (1), with H 2 C(COOC 2 H 5)2, H 2 C(COOCH 3)2 and H 2 C(COC 6 H 5)2 in presence of the auxiliary base (C 2 Hs)3N gives the noradamantane structured compounds CH3C(CH2As)3E2 [E = C(COOC 2 H 5)2 (2), C(COOCH 3) 2 (3) and C(COC 6 H 5) 2 (4)]. The new compounds have been characterized by mass spectrometry and infrared, Raman and X H NMR spectroscopy. 
  Reference    Z. Naturforsch. 36b, 1532—1537 (1981); eingegangen am 5. August 1981 
  Published    1981 
  Keywords    Arsenic Cage Compounds, Synthesis, Vibrational Spectra, Mass Spectra, X H NMR Spectra 
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 TEI-XML for    default:Reihe_B/36/ZNB-1981-36b-1532.pdf 
 Identifier    ZNB-1981-36b-1532 
 Volume    36