Control of the hapticity of pyridine-2-thiolate ligands in rhenium(V) oxo complexes†
Abstract
Treatment of [ReO{κ3-B(pz)4}(OMe)2] 1 with pyridine-2-thiol ligands led to [ReO{κ2-B(pz)4}(κ2-Spy*)(OMe)] (Spy* = 2-SC5H4N 2 or 2-SC5H3NSiMe3-3 3) or [ReO{κ3-B(pz)4}(κ1-2-SC5H4N)2] 4, depending on the reaction conditions. Complexes 2 and 3 reacted with trimethylsilyl chloride yielding [ReO{κ3-B(pz)4}(κ1-2-SC5H4N)Cl]·HCl 6 and [ReO{κ3-B(pz)4}Cl2], respectively. The characterization of the new compounds involves IR and 1H NMR spectroscopies, and X-ray diffraction analysis for 3, 4 and 6.