Center-symmetric dimeric Re(CO)3+ complexes with Schiff base derivatives of salicylic aldehyde

A simple synthetic procedure (reaction between Re(CO)5Cl and 2-[(E)-(phenylimino)methyl]- or 2-[(E)-(n-propylimino)-methyl]-phenol) leads to novel dimeric Re2(CO)6(N∩O−)2 complexes with the structures confirmed by means of X-ray crystallography. The obtained species have been characterized by means of elemental analysis, FT-IR, UV–VIS absorption, and EI-MS spectroscopy. The solvolysis experiments performed in dimethylsulfoxide solutions point to well pronounced stability of the investigated species.

A simple procedure (reaction in boiling toluene between Re(CO)5Cl and Schiff base ligands LH synthesized from salicylic aldehyde and alkyl or aryl amines) leads to novel center-symmetric dimeric complexes Re2(CO)6(L−)2.Figure optionsDownload as PowerPoint slideHighlights
► Schiff base derivatives of salicylic aldehyde LH react with Re(CO)5Cl with formation of dimeric species with general formula of Re(CO)6(L−)2.
► The synthesized complexes have been characterized using EI-MS, UV-VIS, and IR spectroscopy.
► Centre-symmetric structures of the investigated complexes have been confirmed by means of X-ray investigations.