Gold fluoride

This work was supported by the Marsden Fund managed by the Royal Society of New Zealand. Our thanks go to Detlev Figgen, Behnam Assadollahzadeh, Reuben Brown, Jon K. Laerdahl and Pekka Pyykko for helpful discussions and suggestions, and to Wojciech Grochala for letting us know in advance of the solid state results for gold fluoride. We do not claim that our review is comprehensive, and we apologize from possible omissions of any related and important work. A more complete list of references can be found in Pyykko s work [43-45]. 

Since gold hexafluoride promises to be the most powerfully oxidizing hexafluoride of the third transition series, its synthesis is of interest. Although the highest known established gold fluoride was AuF, a structurally ill-... 

It is dissolved by bromine trifluoride, to form finally gold(III) fluoride, AuFj. This is a notable compound, for in it gold exhibits a simple valency of three, whereas in all other gold(III) compounds, gold is 4-coordinate, usually by complex formation (see below). 

In the gold(lll) halides (except the fluoride) there is evidence for the formation of double molecules, AujXg (cf. chlorides of iron(III) and aluminium) so that the coordination is brought up to four, but with a planar structure ... 

Rubidium metal alloys with the other alkaU metals, the alkaline-earth metals, antimony, bismuth, gold, and mercury. Rubidium forms double haUde salts with antimony, bismuth, cadmium, cobalt, copper, iron, lead, manganese, mercury, nickel, thorium, and 2iac. These complexes are generally water iasoluble and not hygroscopic. The soluble mbidium compounds are acetate, bromide, carbonate, chloride, chromate, fluoride, formate, hydroxide, iodide. 

Fluorinated polymers stand out sharply against other construction materials for their excellent corrosion resistance and high-temperature stability. In this respect they are not only superior to other plastics but also to platinum, gold, glass, enamel and special alloys. The fluorinated plastics used in process plants are polytetrafluorethylene (PTFE), fluorinated ethylene/ propylene (FEP), polytrifiuoromonochlorethylene (PTFCE) and polyvinyl fluoride (PVF). They are much more expensive than other polymers and so are only economical in special situations [59]. 

All four monohalides of gold have been prepared but the fluoride only by mass spectrometric methods. AuCl and AuBr are formed by heating the trihalides to no more than 150°C and Aul by heating the metal and iodine. At higher temperatures they dissociate into the elements. Aul is a chain polymer which features linear 2-coordinate Au with Au-I 262 pm and the angle Au-I-Au 72°. 

Brom-benzol, n. bromobenzene. calcium, n. calcium bromide, -cyan, n. cyanogen bromide, bromocyanogen. -dampf, tn. bromine vapor, -eisen, n. iron bromide, -fiasche, /. bromine bottle, -fluor, n. bromine fluoride, -gehalt, tn. bromine content, -gold, n. gold bromide, -goldkalium, n. potassium auri-bromide, potassium bromoaurate. bromhaltig, a. contaim ng bromine, Brom-hydrat, n. hydrobromide bromine hydrate. -hydrin, n. bromohydrin. 

Gold is resistant to many strong acids, but not cyanides or high levels of fluoride, hydrogen fluoride and chlorine. 

The higher fluorides of gold, AuF5 and AuF7, have been reported the former is well characterized [28] ... 

It has been speculated in the past that it might be possible to isolate the first Au(I) fluoride LAuF [182], if disproportionation into metallic gold and Au( 111) can be avoided by stabilizing ligands L, such as (PR3)3AuF [264]. This has just been achieved. Laitar et al. [185] were able to isolate a compound with an N-heterocyclic carbene ligand... 

Figure 4.15 X-ray structure of l,3-bis(2,6-diisopropylphenyl) imidazolin-2-ylidene)-gold(l) fluoride [185].

Schroder, D., Hrusak, J., Tomieporth-Oetting, I.C., Klapdtke, T.M. and Schwarz, H. (1994) Neutral Gold(l) Fluoride Does Indeed Exist. Angewandte Chemie International Edition, 33, 212—214. 

Evans, C.J. and Gerry, M.C.L. (2000) Confirmation of the Existence of Gold(l) Fluoride, AuF Microwave Spectrum and Structure. Journal of the American Chemical Society, 122, 1560-1561. 

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