Bis(triphenylphosphineoxide) manganese(III) chloride
# Bis(triphenylphosphineoxide) manganese(III) chloride

Bis(triphenylphosphineoxide) manganese(III) chloride is a coordination complex of manganese(III) chloride. Unlike most compounds containing $"Mn(III)Cl_3",$ $[MnCl_3(OPPh_3)_2]$ can be stored under normal laboratory conditions. It is a blue, paramagnetic solid.

## Synthesis and reactions

Treatment of meta-stable solutions of $Mn(III)Cl_3$ with triphenylphosphine oxide results in precipitation of solid $[MnCl_3(OPPh_3)_2].$ This compound was first prepared using the thermally unstable ethereal adduct $(dioxane)Mn(III)Cl_3.$ A convenient synthesis starts from $Mn(OAc)_2,$ trimethylsilylchloride, and potassium permanganate.

$[MnCl_3(OPPh_3)_2]$ can be used as a starting material in coordination chemistry.

$[MnCl_3(OPPh_3)_2]$ can also be used as a stoichiometric reagent in alkene dihalogenation reactions.

