Investigations of the {ReO}3+ core: A ‘2+2’ complex from bidentate and potentially trident ligands: [ReO(η2-HOC6H4-2-CH2NC6H4S)(η2-SC5H4N)(PPh3)]

The reaction of [ReOCl3(PPh3)2] with N-(2-hydroxybenzyl)-2-mercaptoaniline (H3hbma) (2) and 2-mercaptopyridine in hot CHCl3 yields [ReO(η2-HOC6H4-2-CH2NC6H4S)(η2-SC5H4N)(PPh3)] (3). The structure of 3 consists of distorted octahedral Re(V) monomers. The coordination geometry at the rhenium is defined by a terminal oxo-group, the nitrogen and sulfur donors of the chelating mercaptopyridine, the nitrogen and sulfur donors of a bidentate (Hhbma)2− ligand, and the phosphorus of the PPh3 group. The C6H4OH arm of (Hhbma)2− is pendant, and the coordinated nitrogen of this ligand is present as a deprotonated amido nitrogen.