Xenon dioxydifluoride (XeO₂F₂) is formed by partial hydrolysis of XeOF₄ or XeF₆

XeOF₄ + H₂O —> XeO₂F₂ + 2HF

XeF₆ + 2H₂O —> XeO₂F₂ + 4HF

It can also be prepared by mixing XeO₃ and XeOF₄ at low temperature (195K). The product is purified by fractional distillation,

Structure : XeO₂F₂ has trigonal bipyramid geometry due to sp³d-hybridization of Xe. One equatorial position is occupied by a lone pair of electrons giving a see-saw structure (shape) to the molecule. There are two Xe–O double bonds containing pπ–dπ overlapping.

Properties : It is a colourless solid which melts at 303K. It is easily hydrolysed to give XeO₃

XeO₂F₂ + H₂O —> XeO₃ + 2HF