Poly[(μ4-tetrazole-1-acetato-κ4 N 3:N 4:O:O′)silver(I)]

In the title complex, [Ag(C3H3N4O2)]n, the AgI atom is four-coordinated in a slightly distorted tetrahedral coordination geometry by two N atoms from two tetrazole-1-acetate (tza) ligands and two O atoms from the other two tza ligands. The tza ligand bridges two Ag atoms through the carboxylate O atoms and simultaneously binds to the other two Ag atoms through the tetrazole N atoms, forming a two-dimensional network parallel to (100).

In the title complex, [Ag(C 3 H 3 N 4 O 2 )] n , the Ag I atom is fourcoordinated in a slightly distorted tetrahedral coordination geometry by two N atoms from two tetrazole-1-acetate (tza) ligands and two O atoms from the other two tza ligands. The tza ligand bridges two Ag atoms through the carboxylate O atoms and simultaneously binds to the other two Ag atoms through the tetrazole N atoms, forming a two-dimensional network parallel to (100).

Related literature
For the diverse coordination modes and potential applications of metal complexes with tetrazole derivatives, see: Stagni et al. (2006); Ye et al. (2006).

Comment
In recent years, organic ligands with a tetrazole functional group have been greatly used in coordination chemistry for construction of metal-organic frameworks due to their diverse coordination modes and potential applications in varied fields (Stagni et al., 2006;Ye et al., 2006). The reaction of tetrazole-1-acetic acid (Htza) with AgNO 3 in an alkaline aqueous solution yielded a new Ag I coordination polymer, whose crystal structure is reported here.
In the title complex, the Ag I atom is four-coordinated in a slightly distorted tetrahedral coordination geometry by two N atoms and two O atoms from four different tza ligands (Table 1), as illustrated in Fig. 1. The adjacent Ag I atoms are co-bridged by tza liands. The tza ligand acts as a tetradentate ligand, bridging two Ag atoms through its carboxylate O atoms, while simultaneously binding to the other two Ag atoms through two N atoms of the tetrazole group, forming a two-dimensional network parallel to (1 0 0).

Experimental
A mixture of AgNO 3 (0.073 g, 0.5 mmol) and Htza (0.990 g, 0.5 mmol) in 15 ml of H 2 O solution was sealed in an autoclave equipped with a Teflon liner (20 ml) and then heated at 373 K for 4 d. Crystals of the title compound were obtained by slow evaporation of the solvent at room temperature.