Acta Cryst. (2002). C58, m471-m474 [doi:10.1107/S0108270102013227]
![[bold mu]](/logos/entities/mu_bdgif.gif)
-guanidinoacetic acid-![[bold kappa]](/logos/entities/kappa_bdgif.gif)
2O:O')bis[(nitrato-O)copper(II)]Abstract: The title compound, [Cu2(NO3)2(C3H7N3O2)4], forms a centrosymmetric dimer, with the two Cu2+ ions separated by 2.6525 (6) Å. The asymmetric unit contains a Cu atom coordinated to two guanidinoacetic acid ligands (via one carboxylate O atom from each ligand) and to a nitrate group. The inversion centre in P
generates the entire molecule, in which each Cu atom is coordinated to four carboxylate and to one nitrate O atom; ignoring the Cu-Cu separation, the geometry about each Cu atom is square pyramidal. The amino acid ligand is in the zwitterionic form. Strong N-H
O hydrogen bonds lead to a three-dimensional supramolecular structure, in which the NO distances are in the range 2.931 (4)-3.278 (3) Å, with N-HO angles ranging from 128 to 170°.
Formula: [Cu2(NO3)2(C3H7N3O2)4]
Online 21 August 2002
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