Abstract
A novel 1D polymer [Cu 3(μ 3-OH) 2(μ 2–H 2O) 2(H 2O) 2(Agly) 2]·(ClO 4) 2 was synthesized through the self-assembly of Cu 2+ and acetylglycine (Agly) in aqueous solution and characterized by X-ray structure analysis. The compound crystallizes in the monoclinic P2(1)/ c space group ( a=5.4762(1) Å, b=15.6136(1) Å, c=13.9036(5) Å, β=98.584(1)°, Z=2) and represents the first 1D coordination polymer with tetranuclear rhombus-like [Cu 4O 4] unit as building block. It should be noted that the rhombus are sharing two vertices and the structure can also be viewed as a zigzag chain based on [Cu 3] building blocks. Agly ligand adopts η 2-coordinated mode and is used to connect two copper ions. With the help of hydrogen bonds, the 1D chains are further linked into ‘∞’ like channels in which counter-anions ClO 4 − are located. The magnetic susceptibility measurements (1.8–300 K) agree with a moderately strong antiferromagnetic interaction between the Cu centers with a J value of −40(2) cm −1 .
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