Crystal structure and Hirshfeld surface analysis of the 1:3 adduct of tetra­aqua­trinitrato­neodymium(III) with 3-amino-1,2,4-triazine

In the title compound, [Nd(NO(3))(3)(H(2)O)(4)]·3C(3)H(4)N(4), neodymium is ten-coordinate with a distorted bicapped square-anti­prismatic geometry formed from six O atoms from three nitrate ions and four O atoms from four coordinated water mol­ecules. The structure also contains neutral 3-amino-1,2,4-triazine mol­ecules which are not coordinated to the central metal atom. The coordinated water mol­ecules and nitrate ions of adjacent complexes are linked by O—H⋯O hydrogen bonds to form cyclic R (2) (2)(8) ring motifs, which in turn are further connected via hydrogen bonds to generate a sheet-like structure. The triazine mol­ecules are involved in a number of hydrogen-bonding inter­actions: N—H⋯N and O—H⋯N inter­actions to form R (3) (3)(9) motifs and N—H⋯N inter­actions to link the organic mol­ecules into chains. Weak C—H⋯O hydrogen bonds also occur between triazine mol­ecules and coordinated nitrate atoms. All these inter­molecular contacts contribute to the stabilization of the three-dimensional supra­molecular framework. Hirshfeld surface analysis shows that N⋯H/H⋯N and H⋯H inter­actions account for 42.9 and 20.6% of the surface, respectively.