Unlike most compounds containing "Mn(III)Cl3", [MnCl3(OPPh3)2] can be stored under normal laboratory conditions.

Treatment of meta-stable solutions of Mn(III)Cl3 with triphenylphosphine oxide results in precipitation of solid [MnCl3(OPPh3)2].

This compound was first prepared using the thermally unstable ethereal adduct (dioxane)Mn(III)Cl3.

[2] A convenient synthesis starts from Mn(OAc)2, trimethylsilylchloride, and potassium permanganate.

[3] [MnCl3(OPPh3)2] can also be used as a stoichiometric reagent in alkene dihalogenation reactions.