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Hexaperchloratoaluminate

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The hexaperchloratoaluminate ion is a triple negative complex of perchlorate with aluminium. It is related to hexanitratoaluminate and tetraperchloratoaluminate all of which are highly oxidising energetic materials.[1]

Solid materials that have been produced in this series of hexaperchloratoaluminate salts are lithium hexaperchloratoaluminate, ammoniumhexaperchloratoaluminate, tetramethylammonium hexaperchloratoaluminate, and trinitroniumhexaperchloratoaluminate .[1]

Preparation

The hexaperchloratoaluminates can be prepared in liquid sulfur dioxide at −10 °C from aluminium trichloride combining with various perchlorates.[1]

3 NO2ClO4 + 3 Li3ClO4 + AlCl3 → 3 NO2Cl + Li3Al(ClO4)6[1]
3 NO2ClO4 + 3 (NH4)ClO4 + AlCl3 → 3 NO2Cl + (NH4)3Al(ClO4)6[1]
6 NO2ClO4 + AlCl3 → 3 NO2Cl + (NO2)3Al(ClO4)6[1]

Aluminium nitrate can be heated at 125 °C with nitrosonium or nitronium perchlorate to yield hexaperchloratoaluminates. [1]

10–14 NOClO4 + Al(NO3)3 → 3 NO2Cl + (NO2)3Al(ClO4)6[1]
6–10 NO2ClO4 + Al(NO3)3 → 3 NO2Cl + (NO2)3Al(ClO4)6[1]
3 NO2ClO4 + 3 K3ClO4 + AlCl3 → 3 NO2Cl + K3Al(ClO4)6[1]

Potassium hexaperchloratoaluminate may or may not exist.[1] Hydrazinium hexaperchloratoaluminate can only be made in an impure form with

3 NO2ClO4 + 3 (NH2H5)ClO4 + AlCl3 → 3 NO2Cl + (NH2H5)3Al(ClO4)6[1]

Guanidinium hexaperchloratoaluminate can be made via:

3 NO2ClO4 + 3 C(NH2)3ClO4 + AlCl3 → 3 NO2Cl + (C(NH2)3)3Al(ClO4)6[1]

References

  1. ^ a b c d e f g h i j k l m Guibert, C. R.; A. D. McElroy (10 Feb 1964). "Annual Report Studies of Complex Perchlorates". Callery Chemical Company. pp. 5–7. Retrieved 3 October 2014.
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