Novel triazole-bridged cadmium coordination polymers varying from zero-to three-dimensionality

Cadmium salts with different triazole ligands have led to a series of novel triazole-cadmium compounds varying from zero- to three-dimensionality. [Cd-2(deatrz)(2)(H2O)Br-4 (1) (deatrz = 3,5-diethyl-4-amino-1,2,4-triazole) is a zero dimensional complex which uses a triazole ligand together with mu-OH2 as bridges to form a 1D chain via hydrogen bonding contacts. {[Cd-3(deatrz)(2)Cl-6(H2O)(2)].2H(2)O}(n) (2), {[Cd(dmtrz)Cl-2].1.5H(2)O}(n) (3) (dmtrz = 3,5-dimethyl-1,2,4-triazole), and {[Cd-3(deatrz)(4)Cl-2(SCN)(4)].2H(2)O}(n) (4) are polymeric 1D chains. 2 and 4 were constructed via trinuclear cadmium units bridged by triazole ligands and chloride atoms, while 3 consists of mu(2)-Cl, mu(3)-Cl, and triazole bridges, cross-linked by hydrogen bonding to give a 3D framework. {[Cd-3(dmatrz)(4)(SCN)(6)]}(n) (5) (dmatrz = 3,5-dimethyl-4-amino-1,2,4-triazole) shows a two-dimensional structure whose fundamental units are trinuclear metal cations bridged via triazole ligands. The complex {[Cd(dmtrz)(SCN)(2)]}(n) (6) is the first three-dimensional example in N1,N2-didentate-bridged triazole-metal compounds. Six complexes exhibit six types of bridging modes of N1,N2-triazole in combination with single-atom bridges. 2, 4, and 5 are the unprecedented examples of polymeric chains and planes constructed via trinuclear metal ion clusters, whereas 3 is the first example of the mu(3)-Cl bridging mode in triazole-metal complexes. We have briefly discussed the variety of dimensionalities based on the tuning of different organic ligands and anions.