A Cd/triazolate/carboxylate metal–organic framework with unprecedented (3,10)-connected topology based on tetranuclear clusters

Using 1,2,4-triazole and adipic acid as coligands, a novel three-dimensional metal–organic framework, namely {[Cd4Cl(trz)5(adi)]·H2O}n (1) (trz = 1,2,4-triazole, adi = adipic acid) was hydrothermally synthesized and characterized. The crystal structure reveals that three independent Cd(II) centers are linked via one μ3-Cl and two μ3-COO− groups to form a unique [Cd4Cl(CO2)2] tetranuclear cluster, which acts as a 10-connected node joining adjacent four tetranuclear subunits and six 3-connected trz nodes to give a novel (3,10)-connected topological net with the Schläfli symbol (43)(41862562).