Crystal structure of tetrakis(1-oxidopyridin-2-yl)methane methanol tetrasolvate

Abstract

The asymmetric unit of the title compound, C21H16N4O4·4CH3OH, consists of a quarter molecule of tetrakis(1-oxidopyridin-2-yl)methane and one methanol solvent molecule. In the crystal, the pyridineN-oxide derivative is located about a fourfold rotoinversion axis and exhibitsS4symmetry along thecaxis. An intermolecular O—H...O hydrogen bond is observed between the O atom of the pyridineN-oxide and the OH group of the methanol. An intermolecular C—H...O bond is also observed between adjacent pyridineN-oxide rings.