Cadmium(II) Complexes of 4-(4-Pyridyl)Pyrazole: A Case of Two Conformational Supramolecular Isomers Polythreaded in the Same Crystal and a Rare Example of 5-Connected nov Net

Stoichiometric control of the reactions of Cd(BF4)2 with 4-(4-pyridyl)pyrazole (4-py-pzH) led to the isolation of four different crystalline products: a mononuclear complex [Cd(4-py-pzH)4(H2O)2](BF4)2 (1), a polythreaded two-dimensional (2D) + one-dimensional (1D) complex [Cd(NCS)2(μ-4-py-pzH)2] n (2), a 1D chain {[Cd(NCS)2(4-Hpy-pzH)2][Cd(NCS)4]} n (3), and a 3D [Cd(NCS)2(μ-4-py-pzH)] n (4). Complex 2 consists of stacked 2D square layers penetrated by columns of 1D ribbons. The 2D and 1D components of 2 are conformational supramolecular isomers of formula [Cd(NCS)2(μ-4-py-pzH)2] n . The topology underlying 4 represents a rare example of a 5-connected nov net observed in metal−organic frameworks.