The synthesis of nickel supramolecular compound with hexamethylenetetramine and fumarate ligands is reported. The compound Ni(H2O)6(fum) ·2(hmt)·4H2O (1) (fum=fumarate; hmt=hexamethylenetetramine) were characterized by elemental analysis, crystal structure, IR. Compound 1 crystallizes in the triclinic system, space group P1, and with Z=1. Cell parameters: a=0. 934 6(1), b=0.933 8(1), c=0.938 8(2) nm, α=79.46(1)°, β=77.84(1)°, γ=61.29 6(7)°. Every metal ion has a octahedral coordination geometry formed by six oxygen atoms from six water molecules, and the relative independent components Ni(H2O)6 2+, fumarate anions, hmt and H2O molecules are linked together by two kinds of hydrogen bonds (O-H...O, and O-H...N) to form a three-dimensional structure. CCDC: 256355.
