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'13 C NMR Spectra' in keywords Facet   Publication Year 1981  [X]
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1981[X]
1Author    *-*, Gerhard Nonnenmacher, Gottfried Zimmermann®, Otto Isaac»Requires cookie*
 Title    Elmar Flaskamp  
 Abstract    The stereochemistry of the bisaboloids in chamomile—with the exception of bisabolol-oxide C—has been elucidated. The in-vitro-examination of the mutual convertibüities of some bisaboloids gave evidence for the stereochemical accordance of the common chiral centres of all the bisaboloids. The absolute configurations of the remaining third asym-metric carbon atoms in bisabololoxide A and B have been determined by NMR spectro-metric studies in comparison with their unnatural semisynthetic epimers. All the stereo-genie centres of the bisabololoxides A and B, of (—)-a-bisabolol and of bisabolonoxide A turn out to be S-configurated. 
  Reference    Z. Naturforsch. 36b, 1023—1030 (1981); eingegangen am 30. April 1981 
  Published    1981 
  Keywords    Matricaria chamomilla L, Bisaboloids, 13 C NMR Spectra, Shift-Reagents 
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 TEI-XML for    default:Reihe_B/36/ZNB-1981-36b-1023.pdf 
 Identifier    ZNB-1981-36b-1023 
 Volume    36 
2Author    Alfred Schmidpeter, Konstantin KaraghiosoffRequires cookie*
 Title    4.5 -Dicyano-1.3.2A 3 -diazaphospholat - ein anionisches, als Monomer stabiles 1.3.2-Diazaphosphol [1] 4,5-Dicyano-1,3,2 A 3 -diazaphospholate -an Anionic 1,3,2-Diazaphosphole, Stable as a Monomer [1]  
 Abstract    Diamino-maleodinitrile and P(NMe2)3 condense at room temperature to the dimethyl -ammonium salt of the dicyano-1,3,2-diazaphosphole. Other products may result under different conditions. Mel methylates the ambivalent diazaphosphole anion at nitrogen. 
  Reference    Z. Naturforsch. 36b, 1273—1276 (1981); eingegangen am 17. Juli 1981 
  Published    1981 
  Keywords    Dicoordinate Phosphorus, Azaphospholes, Ambivalent System, 13 C NMR Spectra, Mass Spectra 
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 TEI-XML for    default:Reihe_B/36/ZNB-1981-36b-1273.pdf 
 Identifier    ZNB-1981-36b-1273 
 Volume    36 
3Author    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 
4Author    Rolf Appel, Karl WaidRequires cookie*
 Title    Darstellung symmetrisch bisaminierter Carbodiphosphorane R2NPh2P=C=PPh2NR2 [1] Synthesis of Symmetrical Diaminocarbodiphosphoranes R2NPh2P=C=PPh 2 NR2 [1]  
 Abstract    The hitherto unknown symmetrical diamino carbodiphosphoranes R2NPh2P = C — PPh2NR2 (5 a-d (R = CH3, Et, nPr, nBu) are obtained in good yield by NaH dehydrohalogenation of the corresponding aminophosphonium salts R2NPh2P^CH^PPh2NR2-i+Cl-(3a-d). 3 a-d can be prepared by aminolysis of C(PPh2Cl)2 (1) or, more conveniently, directly in the three component reaction ditertiary phosphine/amine/CCU (31 P{ 1 H} and 13 C{ 1 H} NMR). 
  Reference    Z. Naturforsch. 36b, 131—134 (1981); eingegangen am 22. Mai 1980 
  Published    1981 
  Keywords    Carbodiphosphoranes, Diorganylamino Substitution, Ylid Reaction, 31 P NMR Spectra, 13 C NMR Spectra 
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 TEI-XML for    default:Reihe_B/36/ZNB-1981-36b-0131.pdf 
 Identifier    ZNB-1981-36b-0131 
 Volume    36 
5Author    Hartmut Hlawatschek, Gertrud Kiel, Gerhard GattowRequires cookie*
 Title    Kristallstruktur und spektroskopische Untersuchungen von Dithiomalonsäurediamid H2C(CS-NH2)2: Ein Beispiel für eine Helixstruktur Crystal Structure and Spectroscopic Investigations of H2C(CS-NH2)2: An Example for an Helix Structure  
 Abstract    The crystal structure of dithiomalonediamide (H2C(CS-NH2)2) has been determined. The compound crystallizes in the orthorhombic space group P2nn, No. 34, with a — 4.354(3), b = 7.940(5) and c = 8.458(5) A. The molecules are connected by S • • • H bridges to form helices along the crystallographic a axes. 
  Reference    Z. Naturforsch. 36b, 1386—1391 (1981); eingegangen am 7. Mai 1981 
  Published    1981 
  Keywords    Crystal Structure, Vibrational Spectra, 13 C NMR Spectra, !H NMR Spectra, Dithiomalonediamide 
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 TEI-XML for    default:Reihe_B/36/ZNB-1981-36b-1386.pdf 
 Identifier    ZNB-1981-36b-1386 
 Volume    36 
6Author    Willy GomblerRequires cookie*
 Title    Se-und 18 C-NMR-Daten von Verbindungen mit C=S-und C—Se-Doppelbindung NMR Spectroscopic Studies on Chalcogen Compounds, III 77 Se and 13 C NMR Data of Compounds Containing C=S and C=Se Double Bonds  
 Abstract    77 Se and 13 C chemical shifts of compounds of type E = C = E' (E, E' = O, S, Se), Se = CF 2 , Se=C(NH2)2, Se = C(J-Bu)2 and l,l,3,3-tetramethyl-2-indanselon are reported. The shielding of both nuclei in the C = Se entity depends strongly on the lowest electron excitation energy. 77 Se-13 C spin-spin coupling constants for the C = Se double bond are presented for the first time. The values show a strong dependence on the s-character of the carbon atom. This indicates an important Fermi contact contribution. Furthermore the influence of halogens, CF3S and CF3SS groups on the 13 C chemical shift in thiocarbonyl compounds of the type S = C(Y)SCF 3 (Y= F, Cl, Br) and S = C(SSCF 3) 2 is described. 
  Reference    Z. Naturforsch. 36b, 1561—1565 (1981); eingegangen am 27. Juli 1981 
  Published    1981 
  Keywords    77 Se NMR Spectra, 13 C NMR Spectra, Coupling Constants, Thiocarbonyl Compounds, Selenocarbonyl Compounds 
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 TEI-XML for    default:Reihe_B/36/ZNB-1981-36b-1561.pdf 
 Identifier    ZNB-1981-36b-1561 
 Volume    36