Synthesis and crystal structure of three new 2D polymeric cadmium(II) complexes of some pyridine derivatives with different cadmium(II)-azide topologies

Three new polymeric complexes [Cd(2-Acpy)(N-3)(2)](n) 1, [Cd(4-Acpy)(2)(N-3)(2)](n) 2 and [Cd-3 (4-Brpy)(4) (N-3)(6)](n) 3 (2-Acpy = 2-acetylpyridine, 4-Acpy = 4-acetylpyridine, and 4-Brpy = 4-bromopyridine) have been synthesized and characterized by single crystal X-ray diffraction. The coordination environment of the cadmium atom in all the complexes is distorted octahedral with two-dimensional polynuclear layers. The cadmium atoms are linked by both mu-1,1 and mu-1,3 in 1, by only mu-1,3 in 2 and by mu-1,1 and mu-1,1,3 azide bridges in 3 giving different cadmium(II)-azide topologies.