Supramolecular Structures of Fe(II) and Co(II) Complexes Based on the Conjugated Schiff-Base Ligands

摘要

Three new complexes [Fe(L~1)2(NCS)2(CH3OH)2] (I), [Co(L~2)2(CH3OH)9(H2O)2KClO4)9 · L~2 · 2H2O (II), and [Co(L~1)3(H2O)2](ClO4)2 · L~1 (III) (L~1 = 1,4-bis(3-pyridyl)-2,3-diaza-1,3-butadiene; L~2= 1,4-bis(4-pyridyl)-2,3-diaza-1,3-butadiene) have been prepared and structurally characterized by X-ray single crystall diffraction. Complexes I and II are mononuclear. Complex III has a 1D chain structure. Complex I is assembled by intermolecular O—H—N hydrogen bonds leading to 2D structure. In complex II, mononuclear complex cations are linked into 1D chain through hydrogen bonds. Then the chains get into 2D structure by intermolecular O—H—N hydrogen bonds too. In complex III, coordinated ligand I_Jacts as a ditopic bridge to produce 1D coordination chain. The self-complementary intermolecular O—H···N hydrogen bonds assemble the chains into 2D sheets.