Abstract
The synthesis and characterization of a novel triazine anion pentafluoroosmium(VI) complex are presented. The single crystal determination of the title compound (hereafter denoted 1) was carried out at −140 °C. Compound 1, C3F4N3OsF5, crystallizes in the monoclinic space group, P21/n, with unit cell dimensions: a = 8.6809(17) Å, b = 7.6848(15) Å, c = 12.415(3) Å, β = 102.633(4)°, V = 808.2(3) Å3, and Z = 4. Synthesis, characterization, X-ray diffraction study along with the crystal supramolecular analysis of the title complex were carried out. The complex contains the anionic triazine unit C3N3F4− acting as a mono dentate ligand to osmium(VI) with five fluoro ligands in a slightly distorted octahedral geometry around osmium(VI) ion (osmium is denoted as Os). The C3N3F4−, triazine anion ring deviates from planarity, only with the C1 being tetrahedral. The crystal lattice of the title compound displays significant intermolecular X···X interactions, namly F···F, F···N and F···C. All types of X···X bonding consolidate to form a three-dimensional network.
Highlights
The employment of osmium(VI) fluoride/antimony(V) fluoride (OsF6 /SbF5 ) as a powerful oxidizing agent to break the aromaticity of benzene to form radical benzene cations was established some time ago [1]
The5 structure of the title compound was determined by single x-ray
The structure of the title compound was determined by single x-ray diffraction analysis
Summary
The employment of osmium(VI) fluoride/antimony(V) fluoride (OsF6 /SbF5 ) as a powerful oxidizing agent to break the aromaticity of benzene to form radical benzene cations was established some time ago [1]. This distorted radical cation was characterized using X-ray structural analysis [1]. Fluorine is comparable to hydrogen atom in size but, possesses different physical and chemical properties, and capable of forming strong halogen bonds [13,14,15,16,17,18,19] The latter can be of different motifs, such as F···F, F···N, and F···C intermolecular interactions
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