Tetraaquabis(N,N-dimethylformamide-κO)zinc(II) bis[(2-{3-[2-(carboxylatomethoxy-κ2 O,O′)phenyl]pyrazol-1-yl-κN 2}acetato-κO)chloridozincate(II)]

The asymmetric unit of the title compound, [Zn(C3H7NO)2(H2O)4][Zn(C13H10N2O5)Cl]2, is composed of a single anion and half a cation. The ZnII atom in the monoanion has a distorted triganol–pyramidal geometry, being coordinated by three O atoms and one N atom from one 2-{3-[2-(carboxylatomethoxy)phenyl]pyrazol-1-yl}acetate ligand and one Cl atom. In the dication, the ZnII atom is located on an inversion center and is coordinated by six O atoms in a slightly distorted octahedral geometry. In the crystal, the ions are linked by O—H⋯O hydrogen bonds, forming a two-dimensional network lying parallel to the ab plane. There are also C—H⋯O and C—H⋯Cl interactions present, which lead to the formation of a three-dimensional structure.

The asymmetric unit of the title compound, [Zn(C 3 H 7 NO) 2 -(H 2 O) 4 ][Zn(C 13 H 10 N 2 O 5 )Cl] 2 , is composed of a single anion and half a cation. The Zn II atom in the monoanion has a distorted triganol-pyramidal geometry, being coordinated by three O atoms and one N atom from one 2-{3-[2-(carboxylatomethoxy)phenyl]pyrazol-1-yl}acetate ligand and one Cl atom. In the dication, the Zn II atom is located on an inversion center and is coordinated by six O atoms in a slightly distorted octahedral geometry. In the crystal, the ions are linked by O-HÁ Á ÁO hydrogen bonds, forming a two-dimensional network lying parallel to the ab plane. There are also C-HÁ Á ÁO and C-HÁ Á ÁCl interactions present, which lead to the formation of a three-dimensional structure.
In the monoanion atom Zn2 is coordinated by one nitrogen atom (N1) from the pyrazolyl, three oxygen atoms (O1, O2, O4) from the carboxylate groups and one chlorine atom, leading to a highly distorted trigonal bipyramidal geometry [the τ factor is 0.69; for perfect SP τ = 0, while for perfect TBP τ = 1.0 (Addison et al., 1984). The ligand is chelated to the zinc(II) atom through a carboxylate bridge (O2, O4), a phenoxide group (O1) and a pyrazole nitrogen atom (N1) to form one five-membered and two six-membered chelate rings.
In the crystal, the ions are linked by O-H···O hydrogen-bonds, to form a two-dimensional network lying parallel to (001). There are also C-H···O and C-H···Cl interactions present leading to the formation of a three-dimensional structure (Table 1 and Fig. 2).

Refinement
The H-atoms were included in calculated positions and treated as riding atoms: O-H = 0.96 Å; C-H = 0.93, 0.96 and 0.97 Å for CH, CH 3 and CH 2 H-atoms, respectively, with U iso (H) = k × U eq (O,C), where k = 1.5 for OH and CH 3 H-atoms and   A view along the a axis of the crystal packing of the title compound, with the hydrogen bonds shown as dashed lines -see Table 1 for details.

yl-κN 2 }acetato-κO)chloridozincate(II)]
Crystal data where P = (F o 2 + 2F c 2 )/3 (Δ/σ) max < 0.001 Δρ max = 1.99 e Å −3 Δρ min = −0.73 e Å −3 Special details Geometry. Bond distances, angles etc. have been calculated using the rounded fractional coordinates. All su's are estimated from the variances of the (full) variance-covariance matrix. The cell esds are taken into account in the estimation of distances, angles and torsion angles 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.