Monatshefte für Chemie / Chemical Monthly

, Volume 106, Issue 4, pp 915–923 | Cite as

Über die Struktur vonM(BF4)2·6H2O fürM=Mg2+, Zn2+, Cd2+

Untersuchungen an Salzhydraten, 7. Mitt
  • Maria Manewa
Anorganische, Struktur-und Physikalische Chemie

The structure of M(BF4)2·6H2O (M=Mg2+, Zn2+, Cd2+). Studies of hydrated salts, 7


The IR and Raman spectra ofM(BF4)2·6H2O forM=Mg2+, Zn2+ and Cd2+ in the range 4000–140 cm−1 were recorded, as were theirDTA andTG curves up to 500°C. The data obtained confirm the presence of the water complex [M(H2O)6]2+ and of the complex anion BF4 in these compounds. It was also established that the six water molecules in Mg(BF4)2·6H2O and in Zn(BF4)2·6H2O are not crystallographically equivalent, and that hydrogen bonds of the type H2O...H2O...F4B and H2O...H2O...H2O participate in the structure. The energy of the hydrogen bonds H2O...F4B for the three crystal hydrates was also calculated.

The thermal and thermogravimetric data are in agreement with and confirm the spectroscopic data.


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Copyright information

© Springer-Verlag 1975

Authors and Affiliations

  • Maria Manewa
    • 1
  1. 1.Abteilung für anorganische Chemie des Chemisch-technologischen InstitutsSofia-DarwenitzaBulgarien

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