ReI(CO)3 complexes with diimine ligands synthesized in situ

Abstract

This work covers the coupling reactions of monodentate ligands coordinated to the ‘‘ReI(CO)3” moiety to afford in situ new bidentate diimine ligands. Similar reactions leading to tridentate ligands are also included. The reactions reviewed present evident advantages respect to the usual synthetic methods of these ligands. Besides, choosing the appropriate substituents allows an easy tuning of the properties of the final complexes. Following an approximate chronological order, the formation of bidentate ligands by C-N coupling from a coordinated carbonyl group, from diiminoisoindoline, and the formation of amidino ligands from nitriles are reviewed first. This is followed by the formation of bidentate ligands by C-C coupling, and finally by the formation of tridentate ligands, either by C-C coupling, by B-N coupling, or by using ‘‘click” reactions.