Two New Cu II Coordination Polymers: Studies of Topological Networks and Water Clusters

Two new Cu II coordination polymers, namely [Cu 2 (BDC) 2 (L) 4 (H 2 O) 2 ] · 14H 2 O ( 1 ) and [Cu 1.5 (BTC)(L) 1.5 (H 2 O) 0.5 ] · 2H 2 O ( 2 ), where L = 1,1′‐(1,4‐butanediyl)bis(imidazole), BDC = 1,4‐benzenedicarboxylate, and BTC = 1,3,5‐benzenetricarboxylate, have been synthesized at room temperature. Complex 1 exhibits an unusual, square‐planar, four‐connected 2D 2 6 4 net, which has been predicated by Wells. Interestingly, three types of water clusters, namely (H 2 O) 6 , (H 2 O) 8 , and (H 2 O) 10 , are observed in the hydrogen‐bonded layers constructed by the BDC ligands and water molecules. The BTC anion in compound 2 is coordinated to the Cu II cation as tetradentate ligand to form a (6 6 ) 2 (4 2 6 4 8 4 ) 2 (6 4 810) net containing three kinds of nonequivalent points. Thermogravimetric analyses (TGA) and IR spectra for 1 and 2 are also discussed in detail. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)