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'Ethyltriphenylphosphonium Polyiodides' in keywords
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1995 (1)
1Author    Karl-Friedrich Tebbe, Taraneh FaridaRequires cookie*
 Title    Untersuchungen an Polyhalogeniden, XXI [1] Die Ethyltriphenylphosphonium-Polyiodide EtPI^PI,* mit n = 3, 5 und 7 Studies of Polyhalides, X X I [1] Ethyltriphenylphosphonium Poly iodides EtPh3PIn with n = 3, 5 and 7  
 Abstract    The compounds EtPh3PI3, EtPh3PI5 and EtPh3PI7 have been prepared by the stoichiometric reaction of EtPh3PI with iodine in a mixture of dichloromethane and ethanol. EtPh3PI3 cry­ stallizes in the monoclinic space group P2,/n with a = 1176.7(3) pm, b = 1202.5(3) pm, c = 1565.9(4) pm, ß = 93.22(2)° and Z = 4. The crystal structure has been refined to R f =0.043 for 3394 reflections. EtPh3PI5 crystallizes in the monoclinic space group I2/a with a = 1913.9(4) pm, b = 1239.0(2)pm, c = 2435.1(4) pm, ß = 115.84(1)° and Z -8 . The crystal structure has been refined to R f = 0.052 for 3043 reflections. EtPh3PI7 crystallizes in the orthorhombic space group Pbca with a = 1702.7(4)pm, b = 1952.5(4) pm, c = 1809.8(4) pm und Z = 8 . The crystal structure has been refined to R f = 0.053 for 3208 reflections. The structures may be described as layerlike packings of cations Ph3EtP+ and of anions If , I f and I f , respectively. The isolated triiodide ion If is slightly asymmetrical and slightly bent as expected. The pentaiodide ion If forms iodine ribbons like a rope ladder. The heptaiodide ion I f is composed of pentaiodide groups and iodine molecules connected to puckered anionic layers. 
  Reference    Z. Naturforsch. 50b, 1685—1691 (1995); eingegangen am 5. Mai 1995 
  Published    1995 
  Keywords    Ethyltriphenylphosphonium Polyiodides, Triiodide, Pentaiodide, Heptaiodide, Crystal Structure 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-1685.pdf 
 Identifier    ZNB-1995-50b-1685 
 Volume    50