10.1016/0022-328X(91)80219-A
The research focuses on the synthesis and crystal structure analysis of compounds containing short Te-N bonds. The purpose of the study is to explore the formation and stabilization of Te-N bonds through the use of specific ligands and substituents, potentially serving as models for the electronic stabilization of Te-N double bonds. Key chemicals used in the research include tellurium(IV) chloride, N-trimethylsilyl-P-triphenyliminophosphorane, and various derivatives of aryltellurium trichlorides. The researchers synthesized several compounds, such as (Ph,P=N),TeCl, and Ph,P=NTe(R)Cl, where R represents different substituents. X-ray diffraction studies revealed that these compounds have short Te-N bonds with lengths of approximately 192 pm. The study concludes that the Te-N bonds can be stabilized by the electronic effects of appropriate substituents, with the triphenylphosphorane iminato ligand and the sulfurdiimide ligand showing electron-releasing properties, while other N-ligands are more electron-accepting. The p-methoxyphenyl ligand was also found to significantly influence the stability of the Te-N bond.
10.1016/S0040-4020(01)92701-2
The study investigates the addition reactions of tellurium derivatives with various unsaturated compounds. It focuses on the reactions of tellurium tetrachloride and aryltellurium trichlorides with simple olefins and α,β-unsaturated acids. Cyclohexene reacts with these tellurium derivatives to form addition products such as 2-chlorocyclohexyltellurium trichloride and aryl-2-chlorocyclohexyltellurium dichloride. However, other olefins like styrene, di-isobutylene, and 1,4-diphenylbutadiene-1,3 do not react with aryltellurium trichlorides and cause reduction of tellurium tetrachloride to elementary tellurium. In the case of unsaturated acids, lactonization occurs due to the neighboring carboxyl group's participation, leading to the formation of aryl-dichlorotelluro-β-valerolactones. The study also explores the reduction of these dichlorides to tellurides and their subsequent transformations, providing insights into the mechanisms and conditions affecting these reactions.
C
