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Abstract
Two new three-dimensional azido-bridged Co(II) compounds with formula [Co(N3)2(2,5-Me2pyz)]n (1) and [Co(N3)2(2-ampym)]n (2) have been structurally and magnetically characterized. 2,5-Me2pyz and 2-ampym are 2,5-dimethylpyrazine and 2-aminopyrimidine, respectively. Compound 1 crystallizes in the monoclinic system with space group P21/c and compound 2 in the orthorhombic system with space group Pnma. In 1 and 2 each cobalt atom is linked to the four nearest-neighbors by end-to-end (EE) azido bridges, forming square layers. These layers are further connected to 3D networks by the N,N′-bridging ligands 2,5-dimethylpyrazine or 2-aminopyrimidine. The magnetic properties of 1 and 2 are reported. The plots of χM or χMT for 1 and 2 show antiferromagnetic coupling.
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