Technetium Complexes with Arylselenolato and Aryltellurolato Ligands


Technetium Complexes with Arylselenolato and Aryltellurolato Ligands

Noschang Cabral, B.; Kirsten, L.; Hagenbach, A.; Piquini, P. C.; Patzschke, M.; Schulz Lang, E.; Abram, U.

Reactions of (NBu4)[TcOCl4] or [TcCl3(PPh3)2(CH3CN)] with in situ-prepared lithium arylselenolates and -tellurolates
give (NBu4)[TcVO(ArE)4] (E = Se, Te; Ar = phenyl) and [TcIII(ArE)3(PPh3)(CH3CN)] (E = Se, Te; Ar = phenyl, 2,6-Me2phenyl,
mesityl) complexes, respectively. The products contain square-pyramidal (TcV compounds) and trigonal bipyramidal (TcIII
complexes) coordinated technetium atoms. Density Functional Theory calculations indicate that the Tc-chalcogen bonds in
the TcIII compounds have greater bond order than in the TcV compounds.

Keywords: Technetium; new compounds; crystal structure; DFT; bond analysis

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Publ.-Id: 25700