Structural diversification of coordination assemblies of MII-dca – Hydroxylpyridine (dca = Dicyanamide)

Three coordination polymers [Mn(dca)2(2-pyEtOH)]n (1), [Co(dca)(MeOH)2(3-PyO)(3-PyOH)]n (2), [Zn(dca) (3-pyO)]n (3) (2-pyEtOH = 2-ethanolpyridine; 3-pyOH = 3-hydroxypyridine) have been synthesized and their crystal structures determined. In the resulting crystalline materials, dca generally display the μ1,5 bridging fashion. 2-pyEtOH is used as bidentate terminal ligand in 1; 3-pyOH is coordinated to CoII in monodentate style in 2; while 3-pyOH is used as a bridging ligand in 3, affording diverse two-, one and three dimensional coordination networks. 3 shows rare eight coordinated bcu-type topology. Meanwhile, different hydrogen bonding interactions are observed in 1 and 2. For 1 and 2, weak antiferromagnetic interactions are observed.

Graphical abstractThree coordination polymers contain dicyanamide anion and hydroxylpyridine coligands were synthesized. The hydroxylpyridine coligand displays diverse coordinated fashion, and the hydroxyl group of hydroxylpyridine coligand also has different roles in constructing supramolecular network, affording diverse two-, one and three dimensional coordination networks. Notably, complex 3 has rare eight coordinated bcu-type topology.Figure optionsDownload full-size imageDownload as PowerPoint slide