Research on the novel group of explosive d-block metal complexes with tetrazoles - syntheses and properties

摘要

Polynitrogen organic ligands are of interest to coordinating chemistry, as they have found, in spite of a short period of research, a very wide application. In this group of compounds, tetrazoles and their derivatives have attracted special attention for over a decade. 5-arylotrazoles contain highly electron-deficient aromatic rings, resulting in high electron affinity. Coordination to the metallic center allows to obtain more structurally advanced compounds and contributes to the increase of thermal stability of the tetrazoles themselves. The mechanism of formation of coordination compounds based on tetrazolium ligands, as well as the formation of tetrazoles from the CAT and N_3 groups on the metallic center are not well researched and described. What is more, the number of known complexes with tetrazoles is relatively small. Therefore, an attempt to research these issues is a valuable contribution to the development of diverse high-energy materials. In the reaction of tetrazoles: 2-(1H-Tetrazol-5-yl)phenol, 4-bromo- and 4-chloro-2-(2H-tetrazol-5-yl)phenol with vanadyl acetylacetonate(IV) and in the reaction of 5-(3-Pyridyl)-I H-tetrazoles with K_3Na[Mo(CN)_4O_2]·6H_2O new complexes were obtained. In the next step, the physicochemical properties of the obtained complexes were determined, including their thermal stability. Thermogravimetric studies and DSC were used in the study of durability and to determine parameters such as thermal decomposition processes and explosion temperature.