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1Author    Arne Haaland, Andreas Hammel, Hanne Thomassen, HansV. Volden, H. Arkesh, B. Singh, PawanK. KhannaRequires cookie*
 Title    The Molecular Structures of Hexamethyldistannane, (CH 3)6Sn2, and Dimethylditellurane, (CH3)2Te2, by Gas Electron Diffraction  
 Abstract    Gas electron diffraction data o f (CH3)6Sn2 and (C H 3)2T e2 are consistent with molecular models o f D 3 and C2 symmetry and bond distances S n -S n = 277.6(3) pm and T e -T e = 268.6(3) pm, respectively. 
  Reference    Z. Naturforsch. 45b, 1143—1146 (1990); received February 2 1990 
  Published    1990 
  Keywords    Gas Electron Diffraction, Hexamethyldistannane, Dimethylditellurane 
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 TEI-XML for    default:Reihe_B/45/ZNB-1990-45b-1143.pdf 
 Identifier    ZNB-1990-45b-1143 
 Volume    45 
2Author    Liv Fernholt, Arne Haaland, Ragnhild Seip, Rüdiger Kniep, Lutz KorteRequires cookie*
 Title    The Molecular Structure of Selenium Dichloride, SeCl2, Determined by Gas Electron Diffraction  
  Reference    Z. Naturforsch. 38b, 1072—1073 (1983); eingegangen am 19. Mai 1983 
  Published    1983 
  Keywords    Molecular Structure, Selenium(II) Chloride, Gas Electron Diffraction 
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 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-1072.pdf 
 Identifier    ZNB-1983-38b-1072 
 Volume    38 
3Author    A. Rn, VasiliIvanovitch Sokolov3, H. Ans, V. Idar Volden, H. Ans, JoachimB. Reunigb, M. Ichael, D., K. Erb, R. Oland, R. ÖslerbRequires cookie*
 Title    The Molecular Structures and Conformational Preferences of Bis(dimethylstibyl)- Oxane, -Sulfane and -Selane, E(SbMe2)2? E = O, S or Se, Me = CH3, by Density Functional Theory Calculations and Gas Electron Diffraction  
 Abstract    Density Functional Theory calculations on E (SbM e2)2, E = O, S or Se, Me = CH3, indicate that the equilibrium structures are syn-syn or near syn-syn conformers with over-all C2 sym­ metry. The barriers restricting rotation about E-Sb bonds are very low, the equilibrium values for the dihedral angles 0(Sb-E-Sb-lp) where lp denotes the direction of the electron lone pair on one of the Sb atoms are probably less than 45°. The calculations further indicate the existence of syn-anti conformers som e 4 kJ m ol-1 above the more stable syn-syn. Gas elec­ tron diffraction data show that both conformers are present in gaseous Ö (SbM e2)2, while the presence of the syn-anti conformer in gaseous Se(SbM e2)2 is uncertain; least-squares refinements yielded the mole fraction % = 0.27(18). The Sb-O and Sb-Se bond distances are 197.6(14) and 255.1(5) pm respectively, the valence angles of the syn-syn conformers are <SbOSb = 122.3(16)° and <SbSeSb = 96.3(11)°. It is suggested that the wide <SbOSb angle is due to across-angle repulsion betw een the Sb atoms. 
  Reference    Z. Naturforsch. 52b, 296 (1997); received Septem ber 30 1996 
  Published    1997 
  Keywords    Distibyloxane, Distibylsulfane, Distibylselane, D ensity Functional Theory Calculations, Gas Electron Diffraction 
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 TEI-XML for    default:Reihe_B/52/ZNB-1997-52b-0296.pdf 
 Identifier    ZNB-1997-52b-0296 
 Volume    52