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Comparative study of two chemically isostructural polymers: [Cu2(VO2)(HPO4)2(NO3)(bpy)2]·2H2O/H3PO4 (bpy is 2,2′-bi­pyridine)

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Abstract:

The title compounds, poly­[bis(2,2′-bi­pyridine)­bis(3-hydrogen phosphato)­nitratodi-2-oxo-dicopper(II)­vanadium dihydrate], [Cu2(VO2)(HPO4)2(NO3)(C10H8N2)2]·2H2O, (I), and poly­[bis(2,2′-bi­pyridine)­bis(3-hydrogen phosphato)­nitratodi-2-oxo-dicopper(II)­vanadium phospho­ric acid solvate], [Cu2(VO2)(HPO4)2(NO3)(C10H8N2)2]·H3PO4, (II), were obtained by similar hydro­thermal methods but under different crystallization conditions. The trinuclear entity which serves as the basic unit in both structures presents two independent CuII ions immersed in similar square-pyramidal N2O3 environments plus an octahedral VO6 core and is organized into a one-dimensional polymer, which is essentially identical in the two structures. The compounds are stabilized by different solvates, viz. two crystallization water mol­ecules in (I) and a phospho­ric acid mol­ecule in (II), which provide the main structural differences through the diversity of interchain interactions in which they serve as bridges.

Document Type: Research Article

DOI: https://doi.org/10.1107/S0108270104019687

Publication date: 2004-10-01

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