Abstract
Three new inorganic coordination polymers, {[Mn(H2O)6][Mn2(H2O)6][(Cu6(mna)6]·6H2O}, 1, {[Mn4(OH)2(H2O)10][(Cu6(mna)6]·8H2O}, 2, and {[Mn2(H2O)5][Ag6(Hmna)2(mna)4]·20H2O}, 3, have been synthesized at room temperature through a sequential crystallization route. In addition, we have also prepared and characterized the molecular precursor [Cu6(Hmna)6]. Compounds 1 and 3 have a two-dimensional structure, whereas 2 has a three-dimensional structure. The formation of 2 has been achieved by minor modification in the synthetic composition, suggesting the subtle relationship between the reactant composition and the structure. The hexanuclear copper and silver cluster cores have Cu···Cu and Ag···Ag distances close to the sum of the van der Waals radii of Cu1+ and Ag1+, respectively. The connectivity between [Cu6(mna)6]6– cluster units and Mn2+ ions gives rise to a brucite related layer in 1 and a pcu-net in 2. The [Ag6(Hmna)2(mna)4]4– cluster in 3, on the other hand, forms a sql-net with Mn2+. Compound 1 exhibits a...
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