Heterobimetallic Complexes of 1,1-Diphosphineamide Ligands

We herein discuss the use of 1,1-diphosphineamide
ligands for the
synthesis of mono- and heterobimetallic complexes of Rh­(I) and Ti­(IV)
metal centers. A small library of monometallic species was synthesized
and isolated: Ti was used to complex to the amide moiety, whereas
Rh was used to bind to the diphosphine. The sequential synthesis of
the heterobimetallic species started from isolation of the Ti­(amidate)
complex followed by addition of Rh precursors in solution. Meticulous
analysis of the complexes by NMR spectroscopy allowed stereometric
and spatial recognition of these challenging to synthesize and isolate
heterobimetallic complexes.