Crystal Structure and Thermoanalytical Study of Neodymium(III) Complex with 2,4′-Bipyridyne

A novel neodymium(III) chloride complex with 2,4′-bipyridine (bpy), (bpyH)[Nd(H 2 O) 9 ]Cl 4 ·bpy·H 2 O is synthesized, crystallized, and characterized by single crystal X-ray diffraction and thermal analysis. The crystal is nine-coordinate homoleptic mononuclear aqua complex and crystallizes in the triclinic P -1 space group with two formula units in the unit cell related by a pseudo-translation of b /2. In the crystal structure, each [Nd(H 2 O) 9 ] 3+ ion is hydrogen bonded in the same way to one 2,4′-bipyridine molecule, one 2,4-bipyridinium cation, and chloride anions. Lattice water molecules form hydrogen bonds which further stabilize the framework. The thermal properties of the compound in the solid state are studied using TG-DTG techniques under the dynamic flowing air atmosphere.