Tetrazole-5-carboxylic Acid Based Salts of Earth Alkali and Transition Metal Cations

Abstract

The tetrazole-5-carboxylate anion was investigated as ligand for earth alkali metal and transition metal complexes. Therefore, the strontium 4a (*3 H(2)O, *2.75 H(2)O, *2.5 H(2)O), barium 4b (*3 H(2)O), copper 4c (*3.5 H(2)O, *4 H(2)O), manganese 4d (*4 H(2)O, *5 H(2)O), and silver tetrazol-5-carboxylate 4e (*1.56 H(2)O) were synthesized and characterized by vibrational spectroscopy (IR), and the crystal structures of 4a (*2.75 H(2)O, *2.5 H(2)O), 4b*3 H(2)O, 4c*4 H(2)O, and 4d*5 H(2)O were determined using single crystal X-ray diffraction. The thermal stability was investigated by DSC-measurements, and the sensitivity toward impact and friction was determined by BAM-standards. The copper, strontium, and barium tetrazole-5-carboxyate proved to be suitable thermal and physical stable colorants for pyrotechnic compositions. The crystal structure of the tetragonal modification of strontium tetrazole-5-carboxyate possesses channels along the c-axis, leading to a porous material.

New Titanium Catalysts Containing Tetrazole for Cycloaddition of CO2 to Epoxides

“…In recent years, tetrazole has been known as a versatile ligand, due to its application in explosives as well as its diverse coordination ability to late transition metals such as Mn, Cu, and Zn . The tetrazole can act as a mono-, bi-, or tetradentate bridging ligand with transition metals, resulting in the formation of high-dimensional networks .…”

Tetraaquabis(1,10-phenanthroline-κ2N,N′)strontium 5,5′-diazenediylditetrazolide

“…The high nitrogen content of tetrazole has led to investigation for their use as potential energy materials (Singh et al, 2006;Klapötke et al, 2009). Especially, complex of tetrazole containing cations like strontium, barium, or copper are sought components for pyrotechnical mixtures, by combination of the ligand and the colorantmetal cation (Hartdegen et al, 2009;Klapötke et al, 2008). Additionally, the 5,5′-azotetrazole with ten nitrogen atoms are predicted to be involved in the hydrogen bonds motif to construct supramolecule (Wang et al, 2009).…”

In situ synthesis, crystal structures, topology and photoluminescent properties of poly[di-μ-aqua-diaqua[μ3-4-(1H-tetrazol-1-id-5-yl)benzoato-κ4 O:O,O′:O′′]barium(II)] and poly[μ-aqua-diaqua[μ3-4-(1H-tetrazol-1-id-5-yl)benzoato-κ4 O:O,O′:O′]strontium(II)]

“…These bondlength values are close to those observed in similar compounds based on Ae 2+ one-dimensional coordination polymers: Ba-O = 2.647-3. 179 (Hartdegen et al, 2009), while in the three-dimensional polymers [Ba 2 M(H-(HCOO) 6 (H 2 O) 4 ] n , Ba-O = 2.801 (2)-3.6143 (2) Å for M = Ni, Ba-O = 2.797 (2)-2.999 (2) Å for M = Zn, and Ba-O = 2.801 (2)-3.004 (2) Å for M = Co (Baggio et al, 2004), and in the strontium complex C 6 H 12 SrN 6 O 10 , Sr-O = 2.506-2.724 Å (Divya et al, 2017).…”