| Abstract: A new Cu(Ⅱ) complex [Cu2(2,4,6-opyta)(H2O)2]·2H2O was prepared hydrothermally through 2,4,6-trimethylpyridine (2,4,6-tmpy) and Cu(NO3)2, where 2,4,6-opyta3- is 3-hydroxy-2,4,6-pyridinetricarboxylate. X-ray analysis indicates that Cu1 and Cu2 centers in this complex both adopt a five-coordinated square-pyramidal geometry. Adjacent [Cu4(2,4,6-opyta)2(H2O)4] units link each other through Cu1-O5 coordination interaction and form a wave-like 2D layer. These 2D layers further form a 3D supermolecular network through abundant intra-, intermolecular hydrogen-bonding interactions between water molecules and carboxylate oxygen atoms. Furthermore, the new ligand 2,4,6-opyta3- is derived from copper-mediated oxidation and hydroxylation of 2,4,6-tmpy by utilizing HNO3 as an oxidant. Crystal data of [Cu2(2,4,6-opyta)(H2O)2]·2H2O: Mr=422.24, Monoclinic, P21/c, a=1.122 15(11) nm, b=0.671 53(7) nm, c=1.715 29(18) nm, β=107.109(2)°, V=1.235 4(2) nm3, Z=4, R1=0.039 1, wR2=0.098 0 (I>2σ(I)). CCDC: 783944. |
