Gold halide
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Gold halides are compounds of gold with the halogens.
Monohalides
[edit | edit source]AuCl, AuBr, and AuI are all crystalline solids with a structure containing alternating linear chains: ..-X-Au-X-Au-X-Au-X-... The X-Au-X angle is less than 180°.[1]
The monomeric AuF molecule has been detected in the gas phase.[2]
Trihalides
[edit | edit source]Gold triiodide does not exist or is unstable.[3]
Gold(III) fluoride, AuF3, has a unique polymeric helical structure, containing corner-sharing {AuF4} squares.
Pentahalides
[edit | edit source]Gold(V) fluoride, AuF5, is the only known example of gold in the +5 oxidation state. It most commonly occurs as the dimer Au2F10.
References
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