CuF

CuF, copper(I) fluoride, is a chemical compound with the formula CuF. It is an ionic salt consisting of copper in the +1 oxidation state and fluoride ions. CuF is a white solid. It is sparingly soluble in water, and its solubility decreases with increasing temperature. Like other copper(I) halides, CuF is prone to oxidation in air, especially in the presence of moisture, to form copper(II) species.

CuF is typically prepared by the reaction of copper(I) oxide with hydrogen fluoride or by the reaction of copper(I) chloride with hydrogen fluoride. It can also be synthesized by the direct reaction of copper metal with fluorine gas at elevated temperatures, although this method can be difficult to control and may lead to the formation of copper(II) fluoride.

The crystal structure of CuF is related to that of sodium chloride, but it exhibits some distortions. Due to its ionic nature, CuF has a relatively high melting point. It is primarily of interest in research settings and has limited industrial applications. Its reactivity and tendency to form complexes make it a subject of study in coordination chemistry.