14720-21-9

Basic information

• Product Name: trifluorogold
• Synonyms: trifluorogold;gold trifluoride
• CAS NO: 14720-21-9
• Molecular Formula: AuF₃
• Molecular Weight: 0
• Mol File: 14720-21-9.mol
• Article Data: 13

Chemical Properties

• Melting Point: 300℃ [CRC10]
• Boiling Point: °Cat760mmHg
• Flash Point: °C
• Appearance: /orange-yellow hexagonal crystals
• Density: 6.750
• CAS DataBase Reference: trifluorogold(CAS DataBase Reference)
• NIST Chemistry Reference: trifluorogold(14720-21-9)
• EPA Substance Registry System: trifluorogold(14720-21-9)

Safety Data

• Hazardous Substances Data: 14720-21-9(Hazardous Substances Data)

Usage

Chemical Properties

orange-yellow hexagonal crystal(s) [CRC10]

Physical properties

Orange-yellow hexagonal crystal; density 6.75 g/cm3; sublimes at 300°C; decomposes at 500°C.

Preparation

Gold(III) fluoride is prepared by fluorination of gold(III) chloride, AuCl3 (or Au2Cl6), at 300°C. Either fluorine gas or hydrogen fluoride may be used as a fluorinating agent.

InChI:InChI=1/Au.3FH/h;3*1H/q+3;;;/p-3

Upstream product

• 7790-91-2 chlorine trifluoride 
• 7440-57-5 gold 
• 7784-36-3 arsenic pentafluoride 
• 122270-70-6 XeF₅⁽¹⁺⁾*AuF₄^(1-)=XeF₅AuF₄ 
• 7782-41-4 fluorine 
• 31140-76-8 BrF₂⁽¹⁺⁾*AuF₄^(1-) = AuBrF₆ 
• 7787-71-5 bromine trifluoride 
• 13863-59-7 bromine fluoride 
• 13453-07-1 gold(III) chloride 
• 11113-87-4 silver fluoride 

Downstream Products

• 7440-57-5 gold 
• 7782-41-4 fluorine 
• 625853-86-3 (F₃As)AuXe⁽¹⁺⁾*Sb₂F₁₁^(1-)=[(F₃As)AuXe]Sb₂F₁₁ 
• 7784-36-3 arsenic pentafluoride 
• 16949-12-5 cesium hexafluoroantimonate 

Relevant articles and documents

Taming the High Reactivity of Gold(III) Fluoride: Fluorido Gold(III) Complexes with N-Based Ligands

The synthesis of [NMe4][AuF4] and [NEt4][AuF4], as well as an improved one-pot synthesis of Cs[AuF4], is reported. The new [AuF4]? salts were structurally characterized by single crystal X-ray diffraction, NMR spectroscopy, vibrational spectroscopy, and mass spectrometry. These salts are the first gold(III) fluoride salts that can be isolated in pure form and are convenient to be used in usual organic solvents for subsequent synthesis. The formation of molecular AuF3 complexes in solution is further reported, characterized as [F3Au(NCCH3)] at low temperature, as [F3Au(py)] and a binuclear derivative which are stable at room temperature. The stability of these species in common organic solvents was investigated and they showed a satisfying stability.

Synthesis and structure of Tetrafluoroaurates(III), TlF2[AuF4], M2F[AuF4]5 (M = Y, La, Bi), Sm[AuF4]3 with an appendix on Sm[AuF4]2

In the system MF3/AuF3 the structures of several yellow Tetrafluoroaurates(III) have been determinated. TlF2[AuF4] crystallizes tetragonal, space group P41212 - D44 (Nr. 92) with a = 573.17(4) pm, c = 2780.4(3) pm, Z = 8; M2F[AuF4]5 (M = Bi, La) tetragonal, space group P41212 - D44 (Nr. 92) with a = 822.89(5) pm, c = 2557.1(3) pm, Z = 4 (Bi); with a = 836.80(3) pm, c = 2602.2(2) pm, Z = 4 (La); Y2F[AuF4]5 monoclin, space group P2/n - C2h4 (Nr. 13) with a = 1188.9(3) pm, b = 797.4(2) pm, c = 895.7(3) pm, β = 89.18(3), Z = 4 and Sm[AuF4]3 trigonal, space group R3c - D3d6 (Nr. 167) with a = 1034.5(1) pm, c = 1614.1(3) pm, Z = 6. All these yellow crystals have been obtained by solid state reactions in autoclaves or sealed goldtubes.

Preparation and structure of F3As-Au+SbF6-, the structures of Au(CO)2+ and Au(PF3)2+

AuF3, Au(SbF6)2, or [Au(SbF6)2 · Au(AuF4)2] react with AsF3 in HF/SbF5 under formation of F3As-Au+SbF6-. This is stable to about 0°C. The crystal structure reveals strong cationic-anionic interactions through one fluorine atom so that a description as F3As-Au-F. . . SbF5 is also possible (a = 798.3(1), b = 912.0(2), c = 1076.3(2) pm, β = 96.25°, space group P21/n). A similar reaction with CO affords [Au(CO)2+]2SbFf6- · Sb2F11- (a = 1404.8(1), b = 622.86(3), c = 1130.2(1) pm, space group Pmma). The cations in these compounds have the expected linear geometry. Reaction with PF3 affords Au(PF3)2+SbF6- (a = 825.5(2), b = 824.4(2), c = 876.4(3) pm, γ = 119.99°, space group P21/n).