Reactions of (NBu)[TcOCl] or [TcCl(PPh)(CHCN)] with in situ-prepared lithium arylselenolates and -tellurolates give (NBu)[TcO(ArE)] (E = Se, Te; Ar = phenyl) and [Tc(ArE)(PPh)(CHCN)] (E = Se, Te; Ar = phenyl, 2,6-Mephenyl, mesityl) complexes, respectively. The products contain square-pyramidal (Tc compounds) and trigonal bipyramidal (Tc complexes) coordinated technetium atoms. Density functional theory calculations indicate that the Tc-chalcogen bonds in the Tc compounds have a greater bond order than those in the Tc compounds.
This work provides a systematic study of how the electronic effect of EDG or EWG in selenium-containing ligands influences the nuclearity of PdII complexes. The solid-state, solution and gas phase behaviors were evaluated for the complexes.
Mn(iii)–porphyrin catalysts with electron-withdrawing substituents were designed to uncover electronic and structural aspects in the cycloaddition of CO2 with epoxides.
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