The study of interaction of fluorine atoms with chromium and its fluorides

The chemistry of gold-fluoro compounds: A continuing challenge for gold chemists

“…Gold pentafluoride is a very reactive compound and a strong fluorinating agent. AuF5 reacts with xenon to produce XeF4, and with bromine to form [BrF2][AuF4]; it also undergoes oxidative addition with fluorine to produce AuF7 (63,66). In water AuF5 explosively decomposes to produce gold metal, HF, O2 and Au(OH)3 but in anhydrous HF or BrF5 hexafluoroaurates are formed (63,67).…”

“…In 1986 a group of Russian workers claimed to have isolated AuF7 by fluorinating AuF5 with atomic fluorine in an oxygen free vacuum system and subsequently condensing the gaseous product into a liquid nitrogen cooled trap (Scheme 2) (66). The yellow crystalline solid has a high vapour pressure and is stable at room temperature.…”

Multinuclear palladium compounds containing palladium centers ligated by five silicon atoms

“…However, an organopalladium compound with a formal oxidation state exceeding ϩ4 has never been identified. On the other hand, highly electronegative fluorine ligands reportedly can produce ϩ5 and ϩ6 oxidation states in inorganic Pd compounds, although such species are unstable and have not been well characterized (7,8). Electrochemical formation of PdO 3 is also suggested (9).…”

Revising the Highest Oxidation States of the 5d Elements: The Case of Iridium(+VII)

“…[6] The isolation of [AuF 7 ], claimed almost 20 years ago, [7] has recently been shown by high-level quantum chemical calculations to be highly improbable. [8] As the existence of [AuF 6 ] is also unlikely, [8] oxidation state + V remains the highest oxidation state of gold that is known beyond doubt.…”