It is known that $\ce{PX3 (X= Cl, Br, I)}$ and $\ce{PX5 (X= Cl, Br)}$ are used to make halogen derivatives of hydrocarbons from alcohols. My question is why there's no information about using $\ce{PF3}$? At least I couldn't find any, so I assume $\ce{PF3}$ is not used for that.
A wild guess that phosphorus holds fluorine atoms tight, and no "free" fluorides are present for the last steps of the reaction to complete.
