Poly[μ2-aqua-μ4-(2-{3-[(6-chloropyridin-3-yl)methyl]-2-oxoimidazolidin-1-yl}acetato)-sodium]

In the title compound, [Na(C11H11ClN3O3)(H2O)]n, there are two independent NaI ions, one of which lies on an inversion center and is coordinated in a slightly distorted octahedral environment. The other NaI ion lies on a twofold rotation axis and is cooordinated in a slightly distorted trigonal–bipyramidal coordination environment. In the organic ligand, the imidazolidine ring adopts a half-chair conformation. The NaI ions bridge organic ligands and water molecules, forming a two-dimensional structure parallel to (100). There are intermolecular O—H⋯O and weak C—H⋯O hydrogen bonds within the two-dimensional structure.

In the title compound, [Na(C 11 H 11 ClN 3 O 3 )(H 2 O)] n , there are two independent Na I ions, one of which lies on an inversion center and is coordinated in a slightly distorted octahedral environment. The other Na I ion lies on a twofold rotation axis and is cooordinated in a slightly distorted trigonal-bipyramidal coordination environment. In the organic ligand, the imidazolidine ring adopts a half-chair conformation. The Na I ions bridge organic ligands and water molecules, forming a two-dimensional structure parallel to (100). There are intermolecular O-HÁ Á ÁO and weak C-HÁ Á ÁO hydrogen bonds within the two-dimensional structure.

Experimental
Crystal data [Na(C 11 H 11 Table 1 Hydrogen-bond geometry (Å , ).  The asymmetric unit is shown in Fig. 1. The bond lengths and angles observed in (I) show normal values and are comparable to those in related structures (Kapoor et al., 2011;Kant et al., 2012). There are two independent Na I ions, one of which lies on an inversion center and is coordinated in a slightly disotorted octahedral environment. The other Na I ion lies on a twofold rotation axis and is cooordinated in a slightly distorted trigonal bipyramidal coordination environment.
The Na I ions bridge organic ligands and solvent water molecules to form a two-dimensional structure parallel to (100).
There are intermolecular O-H···O and weak C-H···O hydrogen bonds within the two-dimensional structure.

Experimental
Ethyl[3-[(6-chloropyridin-3-yl)methyl]-2-(nitroimino)imidazolidin -1-yl]acetate (0.341 g m, 0.001 mol) was dissolved in 5 ml methanol and 5 ml 1 N NaOH solution was added. The reaction mixture was refluxed on a water bath at 343K for 12 h, and then cooled. The compound was re-precipitated upon neutralization with 1 N HCl. The compound was dissolved in methanol and crystallized in a fume hood at room temperature by the process of slow evaporation.

Poly[µ 2 -aqua-µ 4 -(2-{3-[(6-chloropyridin-3-yl)methyl]-2-oxoimidazolidin-1-yl}acetato)-sodium]
Crystal data [Na(C 11 H 11   Refinement. Refinement of F 2 against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F 2 , conventional R-factors R are based on F, with F set to zero for negative F 2 . The threshold expression of F 2 > σ(F 2 ) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F 2 are statistically about twice as large as those based on F, and R-factors based on ALL data will be even larger.