Polyhedron p. 138 - 143 (2016)
Update date:2022-08-04
Topics:
Hu, Bin
Wang, Yue-Hua
Qian, Hui-Fen
Peng, Yu-Xin
Huang, Wei
A pair of isomeric compounds, namely L1-Et [2-(5-(pyridin-4-yl)-4H-1,2,4-triazol-3-yl)acetate ethyl ester] and L3-Et [2-(5-(pyridin-3-yl)-4H-1,2,4-triazol-3-yl)acetate ethyl ester], has been synthesized in this work, and they are used as multi-dentate ligands to react with certain transition-metal ions under solvothermal conditions. As a result, two three-dimensional (3D) coordination polymers, i.e. {[Zn(L1)(H2O)]ClO4·2H2O·0.5MeOH}n (C1) and {[Ni(L2)2](ClO4)2·2H2O}n (C3), have been yielded and structurally characterized, where ligand L2 is found to be the decomposition product of ligand L3-Et. It is noted that a novel tetranuclear Zn4(L1)4 based cluster-organic framework is constructed in the case of C1 exhibiting a three-dimensional (3D) 2-fold interpenetrating diamond structure. By comparing the structures of C1 and C3, it is concluded that the competition between metal-ion complexation and ligand decomposition leads to the formation of different coordination polymers.
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