Go toArchive
Browse byFacets
Bookbag ( 0 )
'Configuration' in keywords
Results  7 Items
Sorted by   
Publication Year
1992 (1)
1990 (1)
1986 (1)
1979 (1)
1978 (1)
1977 (1)
1976 (1)
1Author    W. J. Stec, R. Kinas, A. OkruszekRequires cookie*
 Title    Configurational Assignments to 2-X-2-Y-4-methyl-l,3,2-dioxaphosphorinans  
  Reference    (Z. Naturforsch. 31b, 393—395 [1976]; received July 17 1975) 
  Published    1976 
  Keywords    Dioxaphosphorinans, Configuration, Conformation 
  Similar Items    Find
 TEI-XML for    default:Reihe_B/31/ZNB-1976-31b-0393_n.pdf 
 Identifier    ZNB-1976-31b-0393_n 
 Volume    31 
2Author    M. M., P. Či, S. InRequires cookie*
 Title    The Preparation of Some Unsymmetrically 2,2' -Disubstituted Stilbenes  
 Abstract    The new unsym m etrically 2,2'-disubstituted stilbenes with NO2 , F, Cl, Br, OCH3 , CH3 and NH2 groups as substituents have been prepared by W it t ig or P e r k i n reactions. The compounds 1 -8 were prepared due to the studies o f fragm entation on electron impact, photochem istry and photoelectron spectroscopy. Their geometrical configuration has been established by X H NMR and IR spectra. 
  Reference    (Z. Naturforsch. 32b, 181—183 [1977]; received October 18 1976) 
  Published    1977 
  Keywords    2, 2'-Disubstituted Stilbenes, Synthesis, Configuration 
  Similar Items    Find
 TEI-XML for    default:Reihe_B/32/ZNB-1977-32b-0181.pdf 
 Identifier    ZNB-1977-32b-0181 
 Volume    32 
3Author    Heinz Falk, Klaus ThirringRequires cookie*
 Title    Beiträge zur Chemie der Pyrrolpigmente, XXXIII [1] Darstellung, Struktur und Eigenschaften von isomeren N-Methyl-Bilatrienen-abc (N-Methyl-etiobiliverdine-IV-y) On the Chemistry of Pyrrole Pigments, XXXIII [1] Synthesis, Structure and Properties of Isomeric N-Methyl-bilatrienes-abc (N-Methyl-etiobiliverdines-IV-y)  
 Abstract    Methylation of etiobiliverdin-IV-y yields a ring-A N-methylated product the structure of which was proven by comparison with the corresponding monolactimether and the ring-B methylated product which was synthesized on an independent route. The configura-tion (Z,Z,Z) was deduced by iH-NMR experiments and a more or less helical conformation which is most twisted at the ring-A methine fragment was found. Photoisomerization exclusively takes place at this position giving the (E,Z,Z) diastereomer, a reaction which is discussed in terms of the correlation of light absorption, methine single bond twist and photochemical selectivity. 
  Reference    Z. Naturforsch. 34b, 1448—1453 (1979); eingegangen am 25. Mai 1979 
  Published    1979 
  Keywords    UY-VIS, iH-NMR, Photoisomerization, Configuration, Conformation 
  Similar Items    Find
 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-1448.pdf 
 Identifier    ZNB-1979-34b-1448 
 Volume    34 
4Author    PeterG. Jones, G. Raham Bodwell, Henning HopfRequires cookie*
 Title    Preparation and X-Ray Structure of [2.2](5,6)Indanocyclophane  
 Abstract    The title compound 3 was prepared by pyroly­ sis o f the corresponding bis-sulfone 2 and subject­ ed to X-ray structural analysis; space group P I, a = 477.0(1), b = 625.6(2), c = 1363.6(3) pm, a = 82.79(2), ß = 83.43(2), y = 78.18(3)°, Z = 1, R = 0.058 for 900 reflections. The molecule contains a crystallographic symmetry centre, thus confirm­ ing the anti configuration. 
  Reference    Z. Naturforsch. 45b, 1213—1215 (1990); received February 20 1990 
  Published    1990 
  Keywords    C yclophane, Indanocyclophane, Configuration, X -R ay 
  Similar Items    Find
 TEI-XML for    default:Reihe_B/45/ZNB-1990-45b-1213_n.pdf 
 Identifier    ZNB-1990-45b-1213_n 
 Volume    45 
5Author    Heinz Falk, Karl Grubmayr, Klaus ThirringRequires cookie*
 Title    Beiträge zur Chemie der Pyrrolpigmente, XXIII [1] Die Struktur eines Bilatrien-abc-Derivates im gelösten Zustande On the Chemistry of Pyrrole Pigments, XXIII [1] The Structure of a Bilatriene-abc Derivative in the State of Solution  
 Abstract    The (Z,Z,Z)-configuration of the mono-lactim-ether of an alkyl substituted bilatriene-abc, Etiobiliverdin-IV-y, was established for chloroform solutions. Moreover the confor-mation of this molecule is a helical one (syn-syn-syn) with a twist along the single bonds at the methine groups of approximately 20°. The two tautomeric lactam-forms with a proton on one or the other nitrogen atom of the pyrromethene subsystem are indistin-guishable by the methods used in this investigation: *H NMR pattern, Lanthanide induced shift technique and Nuclear Overhauser Effect measurements. 
  Reference    Z. Naturforsch. 33b, 924—931 (1978); eingegangen am 30. Januar 1978 
  Published    1978 
  Keywords    *H NMR, Lanthanide Shifts, Configuration, Conformation, Tautomeric Equilibrium 
  Similar Items    Find
 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0924.pdf 
 Identifier    ZNB-1978-33b-0924 
 Volume    33 
6Author    Gerhard Hägele, Peter Reinemer3, Michael Batzb, DietrichM. OotzRequires cookie*
 Title    Kristallstruktur und molekulare Dynamik eines  
 Abstract    Stereoisomeren von (P,P,P",P"-Tetraphenyl)-l,l,2,2-ethan-tetrakisphosphinsäuretetraisopropylester Crystal Structure and M olecular Dynamics of a Stereoisomer of (P,P',P",P'"-Tetraphenyl)-l,l,2,2-ethane-tetraphosphinic Acid Tetraisopropylester The crystal and molecular structure o f (P,P',P",P"'-tetraphenyl)-1,1,2,2-ethane-tetraphos-phinic acid tetraisopropylester has been determined from single-crystal M oK a diffractometer data. The crystals are monoclinic with space group C2/c, Z = 4, a = 2054.5(9), b = 1189.8(5), c = 1800.8(8) pm, ß = 110.07(3)°. The structure was solved by direct methods and refined to R -0.046. A 250 ps-vacuo-trajectory was calculated using the Molecular Dynamics program G R O M O S. Structural data and M D results are compared to N M R spectroscopic data. A Karplus-type relation was confirmed for coupling constants 3ypp. 
  Reference    Z. Naturforsch. 47b, 725—7 (1992); eingegangen am 31. Juli 1991 
  Published    1992 
  Keywords    Crystal Structure, Conformation, Configuration, M D Analysis, N M R Spectra 
  Similar Items    Find
 TEI-XML for    default:Reihe_B/47/ZNB-1992-47b-0725.pdf 
 Identifier    ZNB-1992-47b-0725 
 Volume    47 
7Author    AndrzejE. WróRequires cookie*
 Title    A nalogues o f Methyl Y)-Ribo-and D-Arafo/io-furanosides Having Phosphorus in the Anomeric Position+  
 Abstract    Acid-catalysed cyclisation of (1SJ-and (1R)-1-C-(dimethoxyphosphinyl)-D-erythritols gave exclu­ sively P-epimeric analogues of methyl D -ribo-and D-arabino-furanosides with phosphorus in the anom eric position. 
  Reference    Z. Naturforsch. 41b, 791 (1986); received Decem ber 12 1985 
  Published    1986 
  Keywords    Polihydroxy-l, 2-oxaphospholanes, Cyclisation, Regioselectivity, Configuration, ljC N M R Spectra 
  Similar Items    Find
 TEI-XML for    default:Reihe_B/41/ZNB-1986-41b-0791_n.pdf 
 Identifier    ZNB-1986-41b-0791_n 
 Volume    41