Bis{6-methoxy-2-[(4-methylphenyl)iminiomethyl]phenolate-κ2O,O′}tris(nitrato-κ2O,O′)holmium(III) monohydrate

The crystal structure of the title compound, [Ho(NO3)(3)(C15H15NO2)(2)]center dot H2O, contains two Schiff base 6-methoxy-2-[(4-methylphenyl)iminiomethyl]phenolate (L) ligands, three independent nitrate ions that chelate to the Ho-III ion with O atoms and a hydrate water molecule. The coordination environment of the Ho-III ion is ten-coordinate. The L ligands chelate with a strong Ho-O(phenolate) bond and weaker Ho-O(methoxy) contacts. The latter can be interpreted as the apices of the bicapped square-antiprismatic [HoO10] polyhedron. Intermolecular N-H center dot center dot center dot O hydrogen bonds occur. Intramolecular O-H center dot center dot center dot O interactions link the complex molecules and uncoordinated water molecules.