Dianionic Iron and Ruthenium(2-) Biphosphinine Complexes: A Formal d(10) Ruthenium Complex with a Square Planar Geometry This work was supported by the CNRS, the Ecole Polytechnique, and University Paris XI Orsay
Angew Chem Int Ed Engl. 2001 Apr 1;40(7):1251-1253.