Crystal structure of bis(2-{[1,1-bis(hydroxymethyl)-2-oxidoethyl]iminomethyl}-6-methoxyphenolato)manganese(IV) 0.39-hydrate

The title compound, [Mn(C12H15NO5)2]·0.39H2O, is a 0.39 hydrate of the isostructural complex bis(2-{[1,1-bis(hydroxymethyl)-2-oxidoethyl]iminomethyl}-6-methoxyphenolato)manganese(IV) that has previously been reported by Back, Oliveira, Canabarro & Iglesias [Z. Anorg. Allg. Chem. (2015), 641, 941-947], based on room-temperature data. The current structure that was determined at 100 K reveals a lengthening of the c cell parameter compared with the published one due to the incorporation of the partial occupancy water molecule. The title compound crystallizes in the tetragonal chiral space group P41212; the neutral [MnIV(C12H15NO5)2] molecule is situated on a crystallographic C 2 axis. The overall geometry about the central manganese ion is octahedral with an N2O4 core; each ligand acts as a meridional ONO donor. The coordination environment of MnIV at 100 K displays a difference in one of the two Mn-O bond lengths, compared with the room-temperature structure. In the crystal, the neutral molecules are stacked in a helical fashion along the c-axis direction.