The rigid isomeric 5-(x-pyridyl)-1H-tetrazole ligands-directed various isopolymolybdate-based compounds: Assembly, structures and properties

Two new isopolymolybdate-based metal-organic complexes, [Cu 2 (2-ptz) 2 (Mo 4 O 14 ) 0.5 ] ( 1 ) and [Cu 3 (OH) 2 (3-ptz) 4 (γ-H 4 Mo 8 O 26 )(H 2 O) 4 ]·10H 2 O ( 2 ) (2-ptzH = 5-(2-pyridyl)-1H-tetrazole, 3-ptzH = 5-(3-pyridyl)-1H-tetrazole), constructed from isomeric ligands with different N-donor sites were synthesized under hydrothermal conditions. In 1 , each [Mo 4 O 14 ] 4- cluster connected with six neighboring [Mo 4 O 14 ] 4- clusters through six binuclear [Cu 2 (2-ptz) 2 ] 2+ subunits to yield a two-dimensional (2D) layer.

In 2 , bidentate inorganic [Mo 8 O 26 ] 4- anions link the trinuclear [Cu 3 (OH) 2 (3-ptz) 4 ] clusters to construct a 1D chain. Adjacent chains connect through Mo-N bonds between the [Mo 8 O 26 ] 4- anions and pyridyl groups from the trinuclear clusters to form a 2D layer. The effect of the N-donor sites of the rigid isomeric ligands on the structures of 1 and 2 was discussed.