Structural Features of Monomeric Octahedral Monooxo d2-Renium(V) Complexes with Oxygen Atoms of O,N Bidentate-Chelating Ligands (Ln): 2. [ReO(Ln)(Lmono)3] Complexes with Six- and Seven-Membered Chelate Rings ReNC3O and ReNC4O

Abstract

Structural features of 26 mononuclear octahedral monooxo d²-Re(V) complexes with singly charged oxygen atoms of bidentate-chelating (O,N) ligands (Lⁿ), namely, [ReO(Lⁿ)(L_mono)₃] (where L_mono stands for a monodentate ligand) containing six- and seven-membered chelate rings ReNC₃O and ReNC₄O, are considered. The atoms O(Lⁿ), with one exception, are in the trans positions to ligands O(oxo). In [ReO(OPPh₃)Cl₂(L³⁵)], the trans position to the oxo ligand is occupied by the neutral oxygen atom of ligand OPPh₃. In [ReO(Hal)₂(Lⁿ)(L_mono)] [(L_mono = PPh₃, AsPPh₃, and OPPh₃)] structures, two geometric isomers exist: halide ligands are either in the cis- or in the trans position to each other.