Puckered-Boat Conformation Hexameric Water Clusters Stabilized in a 2D Metal−Organic Framework Structure Built from Cu(II) and 1,2,4,5-Benzenetetracarboxylic Acid

1,2,4,5-Benzenetetracarboxylic acid (btcH4) reacts with Cu(NO3)2·6H2O to form 2D coordination polymeric structure {[Cu2(btc)(Py)4·2H2O]·4H2O} n , 1, in the presence of pyridine from water at room temperature. Puckered-boat-shaped hexameric water clusters resulting from four free water molecules and...

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Bibliographic Details
Published in:Inorganic chemistry 2004-08, Vol.43 (17), p.5180-5182
Main Authors: Ghosh, Sujit K, Bharadwaj, Parimal K
Format: Article
Language:English
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Summary:1,2,4,5-Benzenetetracarboxylic acid (btcH4) reacts with Cu(NO3)2·6H2O to form 2D coordination polymeric structure {[Cu2(btc)(Py)4·2H2O]·4H2O} n , 1, in the presence of pyridine from water at room temperature. Puckered-boat-shaped hexameric water clusters resulting from four free water molecules and two water molecules coordinating to metal ions join these sheets to make a 3D network. These water clusters behave as pillars to join those sheets which is the key factor stabilizing the 3D network. Thermal analysis, X-ray powder diffraction, and X-ray structure analysis have been used to characterize this compound. Crystal data for 1 follow:  triclinic space group P1̄, a = 8.905(3) Å, b = 11.137(4) Å, c = 17.484(2) Å, α = 82.342(6)°, β = 81.312(3)°, γ = 82.361(4)° V = 1687.5(1)Å3, Z = 2, R1 = 0.0331, wR2 = 0.0886, S =1.066.
ISSN:0020-1669
1520-510X
DOI:10.1021/ic049739q