A novel 2D copper(II) coordination polymer with bidentate coligands and alternating double EO- and single EE-azido bridges

摘要

A novel two-dimensional (2D) copper(H) coordination polymer, [CuL(N3)2]n (1) (L = 2-aminomethylpyri-dine), has been synthesized and characterized by elemental analysis, IR, X-ray crystallography and magnetic susceptibility. The complex crystallizes in space group P2_(1/c) with a = 9.940(3), b = 8.057(2), c = 12.310(4)A, β= 104.119(4)°, V= 956.1(5)A3, Z = 4, with final R = 0.0543. The copper(II) ion in 1 is coordinated through two N atoms of the ligand L and four N atoms from the azido ligands in an elongated octahedron. The polymer consists of (6,3) layers in which alternate double end-on (EO) and single end-to-end (EE) N_3~- bridging modes are found. The pyridine rings coming from adjacent layers are stacked by π-π interactions. Magnetic measurements reveal a weak antiferromagnetic exchange between copper(II) ions in 1.