A hexa-nuclear {Cu6(ptz)6} cluster containing five [Cu2N4] units with cycle connecting cycle mode induced by tetrazole-based ligand to modify Keggin anions

Two new isostructural 2D compounds based on hexa-nuclear [Cu6I(ptz)6] clusters and Keggin anions, [Cu6I(ptz)6][H3XMo12O40]·2H2O (X = P for 1; As for 2) (ptz = 5-(4-pyridyl)-tetrazole), have been hydrothermally synthesized. The hexa-nuclear [Cu6I(ptz)6] subunits are constructed from five [Cu2N4] units with a cycle connecting cycle mode and further connected by the ptz to form 1D chains. These adjacent 1D chains are further linked by the Keggin anions to construct the intriguing 2D networks.