Fluorine compounds of nickel(III)

Abstract

Nickel(III) fluoride is formed by the reaction of K₂Ni^IVF₆ with AsF₅ in HF. In the absence of AsF₅, K₂Ni^IVF₆, and K₃Ni^IIIF₆ yield insoluble products, in which the nickel oxidation state varies between 2·00 and 2·50, and the soluble NiF₆^2– species. Direct fluorination of nickel salts at 200 °C yields NiF_2·1. The nature of Ni^III in a fluoride environment is discussed.