Antimony(III) Halide‐Assisted Stereospecific Coordination of Thione

Abstract

The antimony halide‐aided stereospecific coordination of a cyclic thiourea‐type of ligand is observed for the first time. The antimony(III) imidazole thione complexes syn‐[(L1)SbCl3] (syn‐1) and anti‐[(L1)SbBr3] (anti‐2) have been synthesized in very good yield by the reaction between the spatially defined steric impact ligand [(IPaul)S] (L1) ([(IPaul)S]=1,3‐bis(2,4‐methyl‐6‐diphenyl phenyl)imidazole thione) and corresponding antimony halide. The stereoselective formation of complexes syn‐1 and anti‐2 has been confirmed by both NMR and single‐crystal X‐ray diffraction studies. Interestingly the stereospecific nature of syn‐1 and anti‐2 remains intact in solution. Furthermore, the thermal stability of antimony(III) imidazole thione complexes were examined by TGA analysis.

Highly active higher coordinated copper(i)–N-heterocyclic chalcogenone catalysed click chemistry

“…43 Nevertheless, three or four coordinated Cu(I) complexes of NHCh in [3+2] cycloaddition reactions are less explored. [44][45][46][47][48][49][50][51][52][53] Moreover, understanding the potential role of ligands and their coordination ability to influence the catalytic application of Cu(I)-NHCh is quite challenging. 24,40,43,45,54,55 Here, we report the [3+2] cycloaddition catalytic applications of neutral tri-coordinated Cu(I) complexes and cationic tetra-coordinated Cu(I) complex.…”

N‐Heterocyclic Thione‐Coordinated Dinuclear Bismuth(III) Trihalides with a Rare Geometry

“…[6][7][8][9][10][11][12][13][14][15] The chemistry of NHE ligands with p-block elements, particularly Sb and Bi, has been studied in detail. [16][17][18][19][20] The mesoionic chalcogenone (MIE) and its metal derivatives are few in comparison to traditional NHE ligands. [21,22,23] For example, the first mesoionic thione was reported in 2020.…”

“…Thus, a wide range of metal derivatives was synthesized and investigated for various catalytic applications [6–15] . The chemistry of NHE ligands with p ‐block elements, particularly Sb and Bi, has been studied in detail [16–20] . The mesoionic chalcogenone (MIE) and its metal derivatives are few in comparison to traditional NHE ligands [21,22,23] .…”