Formation and Crystal Structure of 2,3,5-Triphenyltetrazolium Hexachlorophosphate and Dichlorophosphate(V), [TPT]⁺[PCl₆]^– and [TPT]⁺[PO₂Cl₂]^–

Abstract

2,3,5-Triphenyltetrazolium hexachlorophosphate, [C 19 in dry acetonitrile, and their crystal structures were determined by single-crystal X-ray diffraction analysis. In the title compounds, the [TPT] + cations show a face-to-face stacked orientation between the phenyl rings of neighboring molecules, which is caused by intermolecular π ···π interactions. The crystal structure of compound 1 consists of layers of 2,3,5-triphenyltetrazolium cations and hexachlorophosphate anions. In compound 2 the tetrahedral [PO 2 Cl 2 ] − anions exhibit approximate C 2v symmetry with P-O bond lengths from 1.454 to 1.463Å and P-Cl bond lengths from 2.038 to 2.050Å. The Raman spectrum of compound 1 was recorded, and the assignment of the [PCl 6 ] − Raman modes is proposed.

Complex formation in a liquid-liquid extraction-chromogenic system for vanadium(IV)

“…The results obtained by DFT are considered to be more reliable and are consistent with the expected length of the V=O bond (1.6 Å) [30]. [54][55][56][57]. Table 1: Extraction-spectrophotometric optimization of the V IV -TAO -TTC -water -chloroform system.…”

Extraction-spectrophotometric and theoretical (Hartree-Fock) investigations of a ternary complex of iron(II) with 4-nitrocatechol and 2,3,5-triphenyl-2H-tetrazolium

“…The results showed that the extracted ternary complex has a composition of 1 : 1 : 2 (Fe-4NC-TTC). One can conclude that the Fe(II)-4NC anionic chelate has a double negative charge, since TTC forms monovalent cation (TT + ) [13,[15][16][17][18][19][20][21][22][23][24][25][26] and the Fe(II)-to-TTC molar ratio is 1 : 2 ( Fig. 5, 2).…”

“…We previously reported [13] a liquid-liquid extraction-chromogenic system containing Fe(III), 4NC, and a widely used [15][16][17][18][19][20][21][22][23][24][25][26] cationic ion-association reagent, 2,3,5-triphenyl-2H-tetrazolium chloride (TTC). The next step, study of a similar system containing Fe(II) instead of Fe(III), is accomplished here.…”