Metal-organodiphosphonates: Structural consequences of introducing aromatic tethering groups. The structures of [Cu(phen){HO3P(C12H8)PO3H}], [{Cu(phen)}2{HO3P(C12H8)PO3H}] and [Cu(terpy){HO3P(C12H8)PO3H}] and of the bimetallic materials [{Cu(LL)}2MoO2{HO3

Hydrothermal reactions were used to prepare three copper-organodiphosphonate compounds and two copper-molybdate-organodiphosphonate chains. Compound 1, [Cu(phen){HO3P(C12H8)PO3H}] is a binuclear Cu(II) compound, while [{Cu(phen)}2{HO3P(C12H8)PO3H}] (2) is a Cu(I) species with distorted “T” shaped copper coordination geometry. In contrast, [Cu(terpy){HO3P(C12H8)PO3H}]·1.5H2O (3·1.5H2O) exhibits a zig-zag chain structure. The isomorphous bimetallic diphosphonates, [{Cu(LL)}2MoO2{HO3P(C12H8)PO3H}3]·H2O (LL = bpy (4·H2O), phen (5·H2O)) also exhibit chain structures, constructed from {Cu2MoO2} clusters, bridging aromatic diphosphonate ligands, and diphosphonates coordinating to the clusters at one terminus and projecting a second pendant terminus.

Graphical abstractHydrothermal reactions were exploited to prepare a series of copper-diphosphonate and copper-molybdate-diphosphonate materials. The structure of [{Cu(phen)}2MoO2{HO3P(C12H8)PO3H}3] is shown.Figure optionsDownload full-size imageDownload as PowerPoint slide