Formation of [(C_nC₁imTe)₄Hg]²⁺ (n = 6, 8) upon in‐situ Generation of Dialkylimidazole‐2‐Tellurones in Ionic Liquids at Room Temperature

Abstract

The synthesis of a homoleptic HgII complexes with in situ‐formed N‐heterocyclic carbene telluride ligands is reported. Tetrakis(1‐hexyl‐3‐methylimidazole‐2‐tellurone) mercury(II), [(C6C1imTe)4Hg]2+ (1), and tetrakis(1‐octyl‐3‐methylimidazole‐2‐tellurone) mercury(II), [(C8C1imTe)4Hg]2+ (2), emerge from reaction mixtures containing telluridomercurate anions and potassium cations in imidazolium‐based ionic liquids (CnC1Im)[BF4] (n = 6, 8), if these are exposed to ambient conditions, that is, air, moisture and room temperature. The compounds crystallize with two of the ionic liquid cations each, and form van der Waals dimers via Te···Te interactions in the crystal. Although being coordinated in a homoleptic manner, the orientation of the imidazolium ligands is such that two of them undergo π‐stacking interactions, while the others interact with neighboring units via their alkyl chains.

Crystalline chalcogenidometalate-based compounds from uncommon reaction media

“…3c, and n = 8), were obtained in crystalline form upon in situ formation of the corresponding N-heterocyclic carbene telluride C n C 1 ImTe. 67 It should be noted that this highly sensitive telluride species had not been formed nor captured otherwise prior to this finding.…”

Reactions of noble-metal oxides in ionic liquids near room temperature

“…7,11 After the discovery of the very first NHC complex by Wanzlick et al in 1968, 12 NHC complexes were prepared by different approaches, most often using transmetallation strategies. 7,13 In addition to these conventional approaches, few examples also show the synthesis of NHC complexes in ionic liquids, 6 b ,14 including electrochemical reduction in ionic liquids. 15…”

Discrete Supertetrahedral Tn Chalcogenido Clusters Synthesized in Ionic Liquids: Crystal Structures and Photocatalytic Activity

“…[45] Other types of discrete metal chalcogenide clusters have also been documented. [19,49,[64][65][66][67][68][69][70][71][72][73][74][75][76][77][78] All the discrete supertetrahedral Tn chalcogenido clusters synthesized in ILs thus far are summarized in Table 1, and the space group, band gap and synthetic conditions are listed as well. Noticeably, [Bmmim]Cl (Figure 2, left; Bmmim = 1-butyl-2,3-dimethylimidazolium) was widely adopted in the synthetic process.…”

“…The syntheses of discrete supertetrahedral T n chalcogenido clusters, however, were still elusive until we firstly reported on the syntheses of T5 clusters in ILs [45] . Other types of discrete metal chalcogenide clusters have also been documented [19,49,64–78] …”