Fluorine compounds of nickel(III)

Abstract

Nickel(III) fluoride is formed by the reaction of K2NiIVF6 with AsF5 in HF. In the absence of AsF5, K2NiIVF6, and K3NiIIIF6 yield insoluble products, in which the nickel oxidation state varies between 2·00 and 2·50, and the soluble NiF62– species. Direct fluorination of nickel salts at 200 °C yields NiF2·1. The nature of NiIII in a fluoride environment is discussed.