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Cadmium(I) tetrachloroaluminate

Cadmium(I) tetrachloroaluminate is the inorganic compound with the formula , a tetrachloroaluminate of cadmium(I). It was the first compound reported (1961) that contained cadmium in the +1 oxidation state and features a cadmium–cadmium bond.

Preparation and properties

was originally prepared by dissolving Cd metal in molten followed by the addition of .

: :

Subsequent studies of the Raman vibrational spectrum indicated the presence of a cadmium–cadmium bond, which was confirmed by two separate X-ray diffraction studies of single crystals. The compound can therefore be compared to mercury(I) (mercurous) compounds (such as mercury(I) chloride), which contain . The single bonds are part of ethane-like units sharing vertices with units, with a bond length reported as 257.6 pm or 256.1pm.

is diamagnetic. It contains no unpaired electrons and reacts readily with water disproportionating to give Cd metal and .[[File:Cadmium(I)-tetrachloroaluminate-xtal-1987-Cd-coordination-CM-3D-ellipsoids.png|left|thumb|200x200px|[[Thermal ellipsoid]] plot of a unit]]

References

References

  1. {{PGCH. 0087
  2. (January 1961). "Stabilization of the Cadmium(I) Oxidation State. The System Cd-Cd{{su". Journal of the American Chemical Society.
  3. (Aug 1962). "The Cadmium(I) Ion Cd{{su". Inorganic Chemistry.
  4. (1986). "The cadmium(I) ion, Cd{{su". Journal of the Chemical Society, Chemical Communications.
  5. Staffel, T.. (1987). "Synthesis and crystal structures of {{chem". Zeitschrift für anorganische und allgemeine Chemie.
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