四氟化二磷

四氟化二磷可由PF₂I和Hg反应得到：^[1]

${\displaystyle \mathrm {2\ PF_{2}I\ +\ 2\ Hg\longrightarrow \ P_{2}F_{4}\ +\ Hg_{2}I_{2}} }$

四氟化二磷对水和氧气敏感：^[1]

${\displaystyle \mathrm {2\ P_{2}F_{4}\ +\ H_{2}O\longrightarrow \ F_{2}POPF_{2}\ +\ 2\ F_{2}PH} }$

${\displaystyle \mathrm {4\ P_{2}F_{4}\ +\ O_{2}\longrightarrow \ 2\ F_{2}POPF_{2}} }$

该化合物可用于制备二氟膦基化合物，如在气相中紫外光下和炔烃的三键反应：^[2]