Synthesis and Characterization of Fluorinated Hypervalent Tellurium Derivatives
作者:Ewa Pietrasiak、Antonio Togni
DOI:10.1021/acs.organomet.7b00535
日期:2017.10.9
The synthesis of tellurium derivatives bearing fluorinated groups, similar in structure to their hypervalent iodine congeners, is reported. Thus, a series of CF3, CF2H, and C6F5 aryltellurium(II) species bearing various functional groups interacting with the Te atom was obtained. The installation of the various fluorinated groups relies on the use of the corresponding trimethylsilyl precursors. The
报道了带有氟化基团的碲衍生物的合成,其结构与其高价碘同类物相似。因此,获得了一系列带有与Te原子相互作用的带有各种官能团的CF 3,CF 2 H和C 6 F 5芳基碲(II)。各种氟化基团的安装依赖于相应的三甲基甲硅烷基前体的使用。基于其NMR光谱和X射线晶体学表征,讨论了产物的高价性质。
Trifluoromethyl Derivatives of Benzooxatellurole
作者:Ewa Pietrasiak、Amanda F. Baxter、Benson Jelier、Nico Santschi、Antonio Togni
DOI:10.1002/hlca.201900079
日期:2019.6
Replacement of the iodine atom in an iodine (III) CF3‐transfer reagent with a Te‐aryl moiety was accomplished in a three‐step synthetic sequence. Three compounds of this type have been prepared, two of which were characterized by X‐ray diffraction. Single crystal structures were also obtained for three related Te(IV) compounds unreported so far (4a, 4b, 6b). Comparison with the iodine (III) analogues
Synthesis and structural characterisation of the aggregates of benzo-1,2-chalcogenazole 2-oxides
作者:Peter C. Ho、Jamal Rafique、Jiwon Lee、Lucia M. Lee、Hilary A. Jenkins、James F. Britten、Antonio L. Braga、Ignacio Vargas-Baca
DOI:10.1039/c7dt00612h
日期:——
Iodine oxidation of bis[2-(hydroxyiminomethyl)phenyl] dichalcogenides yields benzo-1,2-chalcogenazole 2-oxides. Annulated derivatives of iso-tellurazole N-oxides spontaneously aggregate into cyclic tetra- and hexamers through Te⋯O chalcogen bonding; the structures of the co-crystals with benzene and CH2Cl2 illustrate the ability of these macrocycles to interact with small guest molecules. The selenium