Two novel trinuclear cluster-based coordination polymers with 2,6-Di-imidazol-1-ylpyridine: solvothermal syntheses, crystal structures, properties and Hirshfeld surface analysis

Two novel trinuclear cluster-based coordination polymers {[M-3(dip)(AcO)(6)](X)}(n) (1, M = Cu, X = CH3OH; 2, M = Co, X = 2H(2)O) (dip is 2,6-Di-imidazol-1-yl-pyridine), have been synthesised and structurally determined by single crystal X-ray diffraction, element analysis. Crystallographic unit of 1 consists of three Cu(II), six acetic ions, one dip ligand and one methanol molecule, which formed 1D chain through acetic bridges. The 1D chain further constructed 2-D network through dip ligand bridge which formed 3-D network through ??? interaction. Crystallographic unit of 2 consists of three Co(II), six acetic ions, one dip ligand and two water molecules. The trinuclear unit further formed a dimmer through dip ligand bridge which constructed 1-D through dip ligand bridge. The 1D chain further constructed 2-D network through ??? interaction. IR and UV-vis spectrum properties of 1 and 2 were studied. In addition, Hirshfeld surface analysis was also studied for 1.