Structural Features of Monomeric Octahedral Monooxo d 2-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

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)(Lmono)3] (where Lmono 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)(Lmono)] [(Lmono = PPh3, AsPPh3, and OPPh3)] structures, two geometric isomers exist: halide ligands are either in the cis- or in the trans position to each other.