trans-(methanol)(methyldiphenyl-phosphine)bis(pentane-2,4-dionato)cobalt(III) hexafluorophosphate hydrate

The title compound [Co(C5H7O2)(2)(C13H13P)(CH4O)]- PF6. H2O, (I), which was converted from trans-[Co(acac)(2)(PMePh2)(H2O)]PF6 (acac is pentane-2,4-dionato by recrystallization from aqueous methanol, has been confirmed as have a coordinated methanol ligand. The molecular structure of the complex cation, trans-[Co(acac)(2)(PMePh2) (MeOH)](+), is similar to that of the above aqua complex found in the ClO4 salt [Kashiwabara er al. (1995). Bull. Chern. Sec. Jpn, 68, 883-888]. The Co-O bond length for the coordinated methanol is 2.059 (3) Angstrom. There is an intermolecular hydrogen bond between the OH group of the coordinated methanol and one of the O atoms of the acac ligands in an adjacent complex cation [O5 ... O3' = 2.914(4) Angstrom], giving a centrosymmetric dimeric dicationic complex.