ChemInform Abstract: Crystal Structure, Infrared and Raman Spectra, and Thermal Decomposition of Magnesium Tetrahydrogen Dimesoperiodate, MgH4I2O10×6H2O.

✍ Scribed by R. Nagel; M. Botova; G. Pracht; E. Suchanek; M. Maneva; H. D. Lutz

• Publisher: John Wiley and Sons
• Year: 2010
• Weight: 36 KB
• Volume: 30
• Category: Article
• ISSN: 0931-7597
• DOI: 10.1002/chin.199946016

✦ Synopsis

4 I 2 O 10 •6H 2 O. -The title compound (III), hitherto wrongly described as Mg(H 4 IO 6 ) 2 •4H 2 O or Mg(IO 4 ) 2 •8H 2 O, crystallizes in the monoclinic space group P2 1 with Z = 2. The structure contains isolated, distorted Mg(H 2 O) 6 2+ octahedra and H 4 I 2 O 10 2-ions connected by an extended network of hydrogen bonds. The I-O bonds are in the ranges 193.3-200.6 pm (bridging O), 177.0-183.2 pm (terminal O), and 188.1-193.2 pm (IOH-groups). MgH 4 I 2 O 10 •6H 2 O undergoes dehydration at 373-485 K yielding two different polymorphs of magnesium metaperiodate. -(NAGEL, R.; BOTOVA, M.;