Dicopper(II) Assembly Containing the Tetrameric Cluster of Water Constructed from Terephthalate Dianion and Copper(II) Macrocyclic Fragment

To utilized a mononuclear fragment of [Cu(L)Cl]ClO₄ (1) and TPHA bridged-ligand as building block by self-assembly technology, a new dinuclear copper(II) compound [(CuL)₂(μ-TPHA)](ClO₄)₂ · 4H₂O (2), where L = 1,3,6,9,11,14-hexaazatricyclo[12.2.1.1^6,9]octadecane, TPHA = terephthalate dianion, has been constructed and structurally characterized by X-ray crystallography. Crystal analyses denotes that crystal water molecules interact with each other give rise to a tetrameric cluster of water, which by sharing dinuclear units result in a 1D chain structure. Complex 2 crystallizes in monoclinic, space group P2₁/c, with a = 11.1586(14), b = 13.2240(16), c = 16.241(2) Å and β = 105.636(2)°. Magnetic measurements confirm that 2 present an antiferromagnetic interaction between the paramagnetic ions.