Bis(triphenylphosphineoxide) manganese(III) chloride explained

Bis(triphenylphosphineoxide) manganese(III) chloride is a coordination complex of manganese(III) chloride. Unlike most compounds containing "Mn(III)Cl3", [MnCl<sub>3</sub>(OPPh<sub>3</sub>)<sub>2</sub>] can be stored under normal laboratory conditions.[1] It is a blue, paramagnetic solid.

Synthesis and reactions

Treatment of meta-stable solutions of Mn(III)Cl3 with triphenylphosphine oxide results in precipitation of solid [MnCl<sub>3</sub>(OPPh<sub>3</sub>)<sub>2</sub>]. 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]

[MnCl<sub>3</sub>(OPPh<sub>3</sub>)<sub>2</sub>] can be used as a starting material in coordination chemistry.

[MnCl<sub>3</sub>(OPPh<sub>3</sub>)<sub>2</sub>] can also be used as a stoichiometric reagent in alkene dihalogenation reactions.

Notes and References

  1. Web site: Goedecke . Catharina . 2022-09-08 . Bench-Stable Manganese(III) Chloride Source . 2022-09-08 . ChemistryViews . en-US.
  2. Uson . R. . etal . 1976 . Pentacoordinate Neutral Manganese(III) Complexes . Transition. Met. Chem . 1 . 3 . 122–126.
  3. Saju . Ananya . Griffiths . Justin R. . MacMillan . Samantha N. . Lacy . David C. . 2022-09-06 . Synthesis of a Bench-Stable Manganese(III) Chloride Compound: Coordination Chemistry and Alkene Dichlorination . Journal of the American Chemical Society . 144 . 37 . en . 16761–16766 . 10.1021/jacs.2c08509 . 36067378 . 252110339 . 0002-7863.

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