Acta Crystallographica Section C

Crystal Structure Communications

Volume 60, Part 10 (October 2004)

metal-organic compounds

 

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

Y. Moreno, A. Vega, E. Spodine, E. Ushak and R. Baggio

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 Cu^II 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.

Formula: [Cu₂(VO₂)(HPO₄)₂(NO₃)(C₁₀H₈N₂)₂]·2H₂O/H₃PO₄

	Structure factor file (CIF format) (230.1 kbytes) Contains datablock I
	Structure factor file (CIF format) (235.7 kbytes) Contains datablock II

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