Influence of metal on coordination geometry and solution dynamics in complexes of cis-ethylenebis(diphenylphosphine oxide) and Ln(OTf)3 (Ln = La, Sm, Lu) X-ray crystal structures and NMR titration studies

This paper describes the coordination chemistry of the relatively rigid, bisphosphine oxide ligand cis-ethylenebis(diphenylphosphine oxide) (cis-dppeO2) with three lanthanide triflate salts (La3+, Sm3+, Lu3+). Four new X-ray crystal structures are reported here, along with solution characterization studies using 1H and 31P NMR spectroscopy.