Complexation of different transition metals with 4-(4-carboxyphenyl)-1,2,4-triazole: Synthesis, crystal structure and hirshfeld surfaces was written by Jiang, Ye-Hao;Liu, Qing-Ling;Luo, Yang-Hui;Sun, Bai-Wang. And the article was included in Journal of Molecular Structure in 2017.Reference of 157069-48-2 This article mentions the following:
Four new complexes based on the 4-(4-carboxyphenyl)-1,2,4-triazole (Hcpt) ligand, {[Co(cpt)2(H2O)4]·H2O} (1), {[Cr(cpt)2(H2O)4]·10H2O} (2), {[Fe(cpt)2(H2O)4]·10H2O} (3), {[Zn(cpt)2 (H2O)2]} (4) have been synthesized and characterized by elemental anal., single crystal x-ray diffraction and TGA. For complexes 1, 2, and 3, they almost have the same coordination mode that only one nitrogen atom of triazole are involved in the coordination, while in the complex 4, only the group COO– participates in the coordination. In the crystal structure of 1, each structural unit[Co(cpt)2(H2O)4] is linked to another by hydrogen bonding formed by the lattice water mols., thus forming a one-dimensional chain structure; In the crystal structure of 2 or 3, each structural unit[Cr(cpt)2(H2O)4] or [Fe(cpt)2(H2O)4] forms a two-dimensional layered structure by intermol. hydrogen bonds from the coordinated water mol. and the group COO–. The results of TGA show that the loss of lattice water and coordinated water mols. in 1, 2 and 3 is <120°, while the loss of coordinated water mols. in 4 is at 190-260°. Hirshfeld surface shows that the N-H···O hydrogen bonding interaction plays a significant role towards the conformation of the basic structure of these complexes. In the experiment, the researchers used many compounds, for example, 4-(4H-1,2,4-Triazol-4-yl)benzoic acid (cas: 157069-48-2Reference of 157069-48-2).
4-(4H-1,2,4-Triazol-4-yl)benzoic acid (cas: 157069-48-2) belongs to triazole derivatives. Triazoles are important five-member nitrogen heterocycles involved in a wide range of industrial applications such as agrochemicals, corrosion inhibitors, dyes, optical brighteners, as well as biologically active agents. Triazole growth retardants such as uniconazole and paclobutrazol have been known to inhibit the biosynthesis of gibberellins by blocking kaurene oxidase, an P450 enzymeReference of 157069-48-2
Referemce:
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics