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Antimony(III) Halide-Assisted Stereospecific Coordination of Thione
Mannem Adinarayana1, Ganesan Prabusankar1
1Department of Chemistry, Indian Institute of Technology Hyderabad Kandi, Sangareddy, Telangana, 502285, India.
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.
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