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1990 (1)
1978 (1)
1976 (1)
1Author    H.-H Perkampus, E. SchönbergerRequires cookie*
 Title    Untersuchungen über die Wechselwirkung von Aromaten mit Antimontrichlorid, IV* Elektronenspektroskopische Untersuchung zur Frage der Farbigkeit der Molekülverbindung ArH * 2 SbCl3 Investigations about the Interaction of Aromatic Compounds with Antimonytrichloride, IV* Elektronspectroscopical Investigation about the Colour of the Aromatics * 2 SbCl3 Complexes  
 Abstract    Contrary to the published results it is shown the colour of the solid molecular complexes arene • 2 SbCl3 is due to impurities in these systems. These impurities are mainly the radical ions of the aromatic compounds. If the formation of these radical ions is avoided the complexes in the solid state are colourless or slightly yellow-coloured. 
  Reference    (Z. Naturforsch. 31b, 73—75 [1976]; eingegangen am 13. September 1975) 
  Published    1976 
  Keywords    Electronic Spectra, Solution, Solid State, Radicalions, Aromatic Compounds 
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 TEI-XML for    default:Reihe_B/31/ZNB-1976-31b-0073.pdf 
 Identifier    ZNB-1976-31b-0073 
 Volume    31 
2Author    Joachim Granzin, W. Olfram Saenger, Ryszard Stolarski, David ShugarRequires cookie*
 Title    Solid State and Solution Structures of an Adenine Analogue of the Antiviral Acyclonucleoside 9-(l,3-Dihydroxy-2-propoxymethyl)guanine  
 Abstract    The title com pound, 9-(l,3-dihydroxy-2-propoxym ethyl)adenine (D H P-A de), an analogue o f the antiviral acyclonucleoside 9-(l,3-dihydroxy-2-propoxym ethyl)guanine (D H P G), crys­ tallizes in the m onoclinic space group P 2,, with unit cell dimensions o f a = 10.848(4), b = 8.765(3), c = 11.432(4) A, ß = 102.14(3)°, with two independent molecules in the asymmetric unit. The crystal structure o f D H P-A de was determined and compared with that for D H PG . The solution conform ations o f both acyclonucleosides were also determined with the aid o f 'H and 13C N M R spectroscopy. In the solid state the acyclic chain may adopt a "folded" form, i.e. gauche about the C (l) —O (l') bond (as in D H P-A de), or an "extended" form (as in D H PG), results which corre­ spond to the rotations about this bond in solution. A general discussion is presented o f the conform ations o f the acyclic chains o f various acyclonucleosides, from the antiviral 9-(2-hydroxyethoxymethyl)guanine (Acyclovir, ACV) through to 2',3'-^co-nucleosides, both in the solid state and in solution, and the relevance o f these to biological activities. 
  Reference    Z. Naturforsch. 45c, 915 (1990); received December 21 1989/April 27 1990 
  Published    1990 
  Keywords    Antiviral Acyclonucleoside, Solid State, Solution Structures 
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 TEI-XML for    default:Reihe_C/45/ZNC-1990-45c-0915.pdf 
 Identifier    ZNC-1990-45c-0915 
 Volume    45 
3Author    M. VeithRequires cookie*
 Title    Cyclische Diazastannylene, II 1 Intermolekulare Lewis-Säure-Base-Addukte bei 1.3.2.4A 2 -Diazasilastannetidinen Cyclic Diazastannylenes, II 1 Intermolecular Lewis-Acid-Base Adducts of 1, 3,2,4A 2 -Diazasilastannetidines  
 Abstract    -diazasilastannetidines can be prepared as mono-mers (organyl = <erf-butyl) or dimers (organyl = isopropyl) in nonpolar solvents, depending on the organic nitrogen substituent. The formation of the dimer, which is due to an intermolecular Lewis-acid-base interaction of Sn(II) with nitrogen, can be initiated by solidification. When the tertf-butyl compound is cooled below 0 °C two crystalline modi-fications are found: a monoclinic phase (C 2/c; a= 10.655(5); b = 24.75(1); c = 17.334(9) Ä; ß = 106.9(1)°) and a triclinic phase (P I; a = 10.68(1); b = 13.51(1); c = 12.36(1) A; a = 96.2(1); ß = 102.6(1); y = 118.4(1)°). The crystal structures turn out to be built of dimeric and monomeric units in the first case and presumably only dimeric species in the second case. The isopropyl derivative crystallizes in the space group P 2i/b (a = 10.77(1); b= 12.14(2); c = 11.15(2) A; ß = 120.2(2)°) with only dimeric units being present, as in the liquid. Interrelationships between the three structures are discussed. 
  Reference    (Z. Naturforsch. 33b, 1—6 [1978]; eingegangen am 5. September/6. Oktober 1977) 
  Published    1978 
  Keywords    Diazastannylenes, Solid State, X-ray, Crystal Structure, NMR l, 3-Diorganyl-2, 2-dimethyl-I, 3, 2, 4A 2 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0001.pdf 
 Identifier    ZNB-1978-33b-0001 
 Volume    33