Supramolecular isomers in the same crystal: a new type of entanglement involving ribbons of rings and 2D (4,4) networks polycatenated in a 3D architecture

The reaction of corresponding cadmium salts with the flexible ligand 1,4-bis(1,2,4-triazol-1-ylmethyl)benzene (bbtz) affords the 3D coordination network [Cd-3(bbtz)(6)(H2O)(6)](BF4)(6)center dot 1.75H(2)O ( 1), containing ribbons of rings and planar 2D ( 4,4) networks polycatenated with each other, the undulating 2D (4,4) network [Cd(bbtz)(2)(H2O)(2)](ClO4)(2)center dot 2H(2)O (2), and ribbons of rings [Cd(bbtz)(2)(H2O)(2)](BF4)(2)center dot 3DMF (3) and [Cd(bbtz)(2)(H2O)(2)](ClO4)(2)center dot 3DMF (4).