Pentakis(methanol-κ O)manganese bis(2,6-diisopropylphenyl) phosphate methanol trisolvate

The title compound, [Mn(C₂₄H₃₄O₄P)(CH₃OH)₅](C₂₄H₃₄O₄P)·3CH₃OH, was formed in the reaction between a hydrate of a manganese(II) salt [either Mn(NO₃)₂(H₂O)₆ or MnCl₂(H₂O)₄] with a methanol solvate of lithium bis(2,6-diisopropylphenyl) phosphate, {Li[OOP(O-2,6- ⁱ Pr₂C₆H₃)₂]·(CH₄O)₃}·CH₄O, in methanol. The structure has monoclinic (Cc) symmetry at 150 K. The complex consists of an [Mn{OOP(O-2,6- ⁱ Pr₂C₆H₃)₂}(CH₃OH)₅]⁺ cation, an [OOP(O-2,6- ⁱ Pr₂C₆H₃)₂]⁻ anion and three non-coordinating methanol molecules. The anion demonstrates disorder of an isopropyl group [occupancy ratio is 0.57 (4):0.43 (4)]. The diarylphosphate ligand in the cation exhibits a κ¹ O terminal coordination mode. The Mn atom is in a nearly unperturbed octahedral environment. The [Mn{OOP(O-2,6- ⁱ Pr₂C₆H₃)₂}(CH₃OH)₅]⁺ cation exhibits one intramolecular O—H...O bond, and is coordinated via two intermolecular O—H...O hydrogen bonds to the [OOP(O-2,6- ⁱ Pr₂C₆H₃)₂]⁻ anion. The cations, anions and non-coordinating methanol molecules are linked into infinite chains along the c-axis direction via 0—H...O hydrogen bonding. The complex is of interest as a possible inhibitor for the thermal decomposition of polydimethylsiloxane. The crystal studied was refined as an inversion twin with a domain ratio of 0.47 (3):0.53 (3).