Acta Cryst. (2004). E60, m1428-m1430  [ doi:10.1107/S1600536804022202 ]

Redetermination of bis(L-asparaginato)copper(II)

I. Vencato, C. Lariucci, K. D. Ferreira, R. C. Santana and J. F. Carvalho

Abstract: The Cu atom of the title compound, [Cu(C₄H₇N₂O₃)₂], is in a tetragonally distorted octahedral environment. A carboxyl O atom and the -amino N atom from each ligand coordinate to Cu in a trans square-planar configuration [Cu-O = 2.003  (3) and 2.020  (3)  Å, and Cu-N = 2.029  (4) and 2.049  (4)  Å]. The octahedron is completed by bridging amide O atoms from adjacent molecules [Cu-O = 2.229  (4)  Å and Cu-O = 2.885  (4)  Å] separated by c translations. This arrangement creates infinite chains linked in the [001] direction, stabilized by intra- and intermolecular N-HO bonds. The structure has already been published [Stephens, Vagg & Williams (1975). Acta Cryst. B31, 841-845]; this redetermination reports the structure with higher precision.

Online 18 September 2004

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