Gold halide

Gold halides are compounds of gold with the halogens.

Monohalides

, 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°.
The monomeric AuF molecule has been detected in the gas phase.

does not exist or is unstable.
Gold fluoride, AuF₃, has a unique polymeric helical structure, containing corner-sharing squares.

, AuF₅, is the only known example of gold in the +5 oxidation state. It most commonly occurs as the dimer Au₂F₁₀.