Electrophilic substitution reactions of 2-acetylpyridine, 2-acetylpyrrole & cyclohexanone: Isolation and molecular structures of novel organotellurium(IV) chlorides

Palladium(ii) complexes of 2,2′-tellurobis(N,N-diphenyl acetamide): efficient catalysts for Suzuki–Miyaura coupling at room temperature under air

Three complexes, [Pd(L2)2Br2](C1), [(L2)PdCl(μ-Cl)2PdCl(L2)](C2), and [Pd(L2)PPh3Cl2](C3), where L2 = 2,2′-tellurobis(N,N-diphenylacetamide), catalyze Suzuki–Miyaura coupling (loading: 0.001 mol % of Pd) of eleven ArX at room temperature under air.

Competing Effects of Chlorination on the Strength of Te⋅⋅⋅O Chalcogen Bonds Select the Structure of Mixed Supramolecular Macrocyclic Aggregates of Iso-Tellurazole N-Oxides

Chlorination of 3-methyl-5-phenyl-1,2-tellurazole-2-oxide yielded the λ⁴ Te dichloro derivative. Its crystal structure demonstrates that the heterocycle retains its ability to autoassociate by chalcogen bonding (ChB) forming macrocyclic tetramers. The corresponding Te⋅⋅⋅O ChB distances are 2.062 Å, the shortest observed to date in aggregates of this type. DFT-D3 calculations indicate that while the halogenated molecule is stronger as a ChB donor it also is a weaker ChB acceptor; the overall effect is that the ChBs in the chlorinated homotetramer are not significantly stronger. However, partial halogenation or scrambling selectively yield the 2 : 2 heterotetramer with alternating λ⁴ Te and λ² Te centers, which calculations identified as the thermodynamically preferred arrangement.

Organotellurium compounds: an overview of synthetic methodologies

In wake of emerging applications of organotellurium compounds in biological and material science avenues, the current review describes their key synthetic methodologies while focusing the synthesis of organotellurium compounds through five ligand-to-metal linkages including carbon; carbon-oxygen; carbon-nitrogen; carbon-metal; carbon-sulfur to tellurium. In all of these linkages whether tellurium links with ligands through a complicated or simple pathways, it is often governed through electrophilic substitution reactions. The present study encompasses these major synthetic routes so as to acquire comprehensive understanding of synthetic organotellurium compounds.