3,5-Bis[(pyridin-4-yl)meth­oxy]benzoic acid

Single crystals of the title compound, C₁₉H₁₆N₂O₄, were obtained under hydro­thermal conditions by an unintended recrystallization of the employed microcrystalline starting material. The [(pyridin-4-yl)meth­oxy]benzoic acid unit is nearly planar, with a maximum deviation from the least-squares plane of 0.194 (2) Å. This plane is inclined by 35.82 (6)° to that defined by the second (pyridin-4-yl)meth­oxy group [in which the largest deviation from the least-squares plane is 0.013 (2) Å]. In the crystal, mol­ecules are linked by O—H...N hydrogen bonds involving the acid hy­droxy group and a pyridine N atom into chains parallel to [-201].

Chlorido[2,2′-[1,2-phenyl­enebis(nitrilo­methanylyl­idyne)]diphenolato-κ⁴O,N,N′,O′]manganese(III) methanol monosolvate

In the title complex, [Mn(C₂₀H₁₄N₂O₂)Cl]·CH₃OH, the central Mn^III atom displays a distorted square-pyramidal coordination by two N and two O atoms from the tetradentate 2,2′-[1,2-phenyl­enebis(nitrilo­methanylyl­idyne)]diphenolate ligand and one chloride ligand. The Mn^III atom is 0.525 (4) Å out of the square basal N₂O₂ least-squares plane. The complex mol­ecule is hydrogen bonded to the methanol solvent mol­ecule.