Oxidorhenium(V) Complexes with Benzoylselenoureas

Oxidorhenium(V) complexes with N , N ‐dialkyl‐ N′ ‐benzoylselenoureas (HL) were prepared from reactions with (NBu 4 )[ReOCl 4 ]. The formation of compounds such as [ReO(L‐κ O , Se ) 2 (OMe)] or [{ReO(L‐κ O , Se ) 2 } 2 O] suggests parallels with the established chemistry of corresponding benzoylthioureas, while the isolation of unusual species such as [ReO(L‐κ O , Se ) 2 (L‐κ Se )], [{ReO(L‐κ O , Se ) 2 } 2 Se 3 ] and the formation of the respective diselenide suggest a more complicated reaction pathway with the unstable selenium compounds, and one in which degradation products of the ligands also plays a role.