Synthesis and structure of a three-dimensional coordination polymer [Ag3hmt3(µ3-btc)] 5H2O.

A new coordination polymer [Ag3hmt3(µ3-btc)]·5H2O (1 )(hmt = hexamethylenetetramine, btc = 1,3,5-benzenetricarboxyl)has been successfully synthesized. Crystal data: P21/a, a = 11.9906(2) Å,b= 17.3689(2) Å,c= 16.96100(10) Å, ß = 101.9820(14)°,V= 3455.40(7) Å3,Z= 4,Dc= 2.002 mg/m3. In the hexagonal structure of the Ag-hmt unit, each Ag-hmt unit comprises three Ag atoms and three hmt ligands. The µ3-btc ligands bridge the adjacent two-dimensional honeycomb-like Ag-hmt layers to form three-dimensional networks. Structural analysis shows that hydrogen bonds play a key role for the structural stability of the compounds. [ABSTRACT FROM AUTHOR]