Zheng, Ze-Bao et al. published their research in Journal of Molecular Structure in 2009 | CAS: 4546-95-6

1H-1,2,3-Triazole-4,5-dicarboxylic acid (cas: 4546-95-6) belongs to triazole derivatives. However, triazoles are also useful in bioorthogonal chemistry, because the large number of nitrogen atoms causes triazoles to react similar to azides. The presence of the three nitrogen atoms in triazole structures afforded opportunities for a plethora of structural modification with the generation of novel therapeutically potential agents, which is different from other heterocyclic compounds.Formula: C4H3N3O4

Hydrothermal syntheses and structural characterization of four complexes with in situ formation of 1,2,3-triazole-4-carboxylate ligand was written by Zheng, Ze-Bao;Wu, Ren-Tao;Li, Ji-Kun;Sun, Yi-Feng. And the article was included in Journal of Molecular Structure in 2009.Formula: C4H3N3O4 This article mentions the following:

Four new complexes constructed with 1,2,3-triazole-4-carboxylate and bipyridyl-like ligands, [Cu(ta)(bipy)·H2O]n (1), [Mn2(ta)2(bipy)2(H2O)2·2H2O]n (2), [Zn(ta)(phen)2·5H2O]n (3) and [Ni(ta)(phen)2·8H2O]n (4) (ta = 1,2,3-triazole-4-carboxylate, bipy = 2,2′-bipyridine, phen = 1,10-phenanthroline), were prepared under hydrothermal conditions and characterized by IR, elemental analyses and single-crystal x-ray analyses. The ta ligand is formed in situ by the decarboxylation of 1H-1,2,3-triazole-4,5-dicarboxylic acid. In the complex 1, the Cu(II) ions are bridged by ta ligand into a 1-dimensional zigzag chain coordination polymer motif. Binuclear [Mn2(ta)2(bipy)2(H2O)2] units bridged by ta ligands are linked into a two-dimensional layered structure via interdimeric hydrogen bonds within the structure of 2. Compounds 3 and 4 are mononuclear complexes. Most interestingly, the crystal-lattice water mols. in complexes 3 and 4 are connected via intermol. O-H···O hydrogen bonds into 1-dimensional tapes and 2-dimensional layers, resp. In the experiment, the researchers used many compounds, for example, 1H-1,2,3-Triazole-4,5-dicarboxylic acid (cas: 4546-95-6Formula: C4H3N3O4).

1H-1,2,3-Triazole-4,5-dicarboxylic acid (cas: 4546-95-6) belongs to triazole derivatives. However, triazoles are also useful in bioorthogonal chemistry, because the large number of nitrogen atoms causes triazoles to react similar to azides. The presence of the three nitrogen atoms in triazole structures afforded opportunities for a plethora of structural modification with the generation of novel therapeutically potential agents, which is different from other heterocyclic compounds.Formula: C4H3N3O4

Referemce:
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics