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Bis(imidazole) coordination polymers controlled by oxalate as an auxiliary ligand

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journal contribution
posted on 2015-03-24, 12:35 authored by Ya-Guang Sun, Jian Li, Jiang You, Ying Guo, Gang Xiong, Bao-Yi Ren, Li-Xin You, Fu Ding, Shu-Ju Wang, Francis Verpoort, Ileana Dragutan, Valerian Dragutan

Seven coordination polymers {[M(L)2(H2O)2]·(NO3)2}n (M = Co (1), Ni (2), Cd (3)) and [M(L)(ox)]n (M = Co (4), Ni (5), Zn (6), and Mn (7)) have been synthesized (L = 2,6-bis(imidazol-1-yl)pyridine, ox = oxalate) under hydrothermal conditions. Single-crystal X-ray diffraction analysis has revealed that 1–3 are isomorphous and possess 2-D networks, whereas 4–6 are isomorphous, but involve two kinds of oxalate chains. The structure of 7 is different from those of 4–6 due to various bridging modes of the oxalate ligand. Magnetic studies have revealed that 1, 2, 4, 5, and 7 exhibit strong antiferromagnetic coupling. Among these, 1 exhibits an interesting spin-canting phenomenon.

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