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1995 (1)
1Author    M. Atthias Westerhausen, Wolfgang SchwarzRequires cookie*
 Title    Tetrakis(tetrahydrofuran-0)calcium-und -strontium-bis[bis(trimethylsilyl)- arsanid] -Vergleich der spektroskopischen Parameter sowie der Molekülstrukturen Tetrakis(tetrahydrofuran-0)calcium and Strontium Bis[bis(trimethylsilyl)- arsanide] -A Comparison of the Spectroscopic Param eters and the Molecular Structures  
 Abstract    Calcium-and strontium bis[bis(trimethylsilyl)amide] react with bis(trimethylsilyl)arsane in tetrahydrofuran to give the corresponding tetrakis(tetrahydrofuran-O) metal bis[bis(trime-thylsilyl)arsanides]. The calcium derivative crystallizes in the triclinic space group P I with a = 1191.7(2), b = 1232.0(2), c = 1655.0(2) pm, a = 102.46(1)°, ß = 107.92(1)°, y = 104.66(1)° and Z = 2, the strontium derivative in the orthorhombic space group Pbca with a = 2153.4(3), b = 1852.2(3), c -2182.4(3) pm and Z = 8. Both m olecules exist as frans-isomers with a nearly linear A s -M -A s moiety; however, the strontium analogue contains two remarkably different configurations for the arsenic atoms. One A s atom is surrounded nearly trigonally planar with a S r -A s bond length of 310 pm, whereas the other pnictogen atom has an angle sum of 338° with a S r -A s distance of 315 pm. 
  Reference    (Z. Naturforsch. 50b, 106 [1995]; eingegangen am 2. August 1994) 
  Published    1995 
  Keywords    Arsanide, Bis(trimethylsilyl)arsanide, Calcium, Strontium, NM R Spectra 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-0106.pdf 
 Identifier    ZNB-1995-50b-0106 
 Volume    50