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  • preparation  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 622 (1996), S. 1901-1906 
    ISSN: 0044-2313
    Keywords: Tetrahydrogen mesoperiodate ; preparation ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Li2H4I2O10, the First TetrahydrogendimesoperiodateLi2H4I2O10 has been obtained as an intermediate during the dehydration of LiH4IO6 · H2O to LiIO4, for the first time. According to the results of an X-ray structure determination (monoclinic, P21/n, a = 533.98(4), b = 471.85(4), c = 1431.48(10) pm, β = 91.614(7)°, Z = 2, 726 diffractometer data, R = 0.056), Li2H4I2O10 contains the previously unknown tetrahydrogendimesoperiodate ion H4I2O102-, consisting of two edge-shared IO6 octahedra. They are connected with LiO6 octahedra via common edges and vertices. The crystals are non-merohedrally twinned along (100).
    Notes: Li2H4I2O10 wurde als Zwischenstufe während der Entwässerung von LiH4IO6 · H2O zu LiIO4 erstmals erhalten. Nach der Röntgenstrukturanalyse (monoklin, P21/n, a = 533,98(4), b = 471,85(4), c = 1431,48(10) pm, β = 91,614(7)°, Z = 2, 726 unabhängige Reflexe, R = 0,056) liegt das bisher unbekannte Tetrahydrogendimesoperiodatanion H4I2O102- in Form zweier kantenverknüpfter IO6-Oktaeder vor, die ihrerseits mit LiO6-Oktaedern kanten- und eckenverknüpft sind. Die Kristalle sind systematisch verzwillingt. Es handelt sich um monokline Ebenenzwillinge nach (100).
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 623 (1997), S. 1055-1060 
    ISSN: 0044-2313
    Keywords: Iodyldisulfate ; preparation ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The First Crystal Structure Analysis of an Iodyl CompoundSingle crystals of (IO2)2S2O7 were obtained for the first time by reacting iodic acid and oleum at 195°C. According to the results of a X-ray structure determination (monoclinic, P21/a, a = 885.0(2), b = 1037.3(2), c = 915.8(2) pm, β = 94.75(2)°, Z = 4, 1466 diffractometer data, R1 = 0.033, wR2 = 0.063), (IO2)2S2O7 contains dimeric iodyl cations (IO2)22+, which are connected by disulfate groups thus forming polymeric strands. Strikingly, the I—O-distances range almost continously from 174 pm (strong intramolecular bonds) to — 300 pm (van der Waals contacts).
    Notes: Durch Umsetzung von Iodsäure in Oleum bei 195°C wurden erstmals Einkristalle von Iodyldisulfat erhalten. Nach der Röntgenstrukturanalyse (monoklin, P21/a, a = 885,0(2), b = 1037,3(2), c = 915,8(2) pm, β = 94,75(2)°, Z = 4, 1466 unabhängige Reflexe, R1 = 0,033, wR2 = 0,063) liegen dimere Iodylkationen (IO2)22+ vor, die über Disulfatgruppen zu polymeren Strängen verknüpft sind. Auffällig ist eine nahezu gleichmäßige Verteilung der I—O-Abstände über den gesamten Bereich von starken intramolekularen Bindungen (174 pm) bis zu intermolekularen Kontakten vom van der Waals Typ (〉 300 pm).
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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