Effect of pH on the self-assembly of three Cd(II) coordination compounds containing 5-(4-pyridyl)tetrazole: syntheses, structures, and properties

The in situ [2 + 3] cycloaddition reaction of nitrile and azide in the presence of Cd(II) produces the multidentate 4-ptz in these compounds.

X-ray diffraction results indicate that metal centers in 1 are linked by 4-ptz – , , and OH − in their respective μ 5 -, μ 2 -, μ 3 -bridging modes, forming a 3-D coordination polymer. For 2 , although the same raw materials are used, the component anions are linked to Cd(II) centers in completely different ways, i.e. for 4-ptz − in μ 3 −, in μ 5 -, and OH − in μ 3 -bridging modes, forming another 3-D coordination network.