Synthesis, Coordination and Electrochemistry of a Ferrocenyl‐Tagged Aminobisphosphane Ligand

Introducing a ferrocene moiety into a molecule results in the incorporation of a metal center and a redox active moiety. This contribution describes the synthesis of FcN(CH 2 PPh 2 ) 2 ( 1 ; Fc=ferrocenyl), a ferrocene analog of the widely studied bis‐phosphane pincer ligands, RN(CH 2 PPh 2 ) 2 . Compound 1 was studied as a ligand in complexes of Group 10 and 11 metal ions. The following compounds were synthesized and characterized using a combination of spectroscopic methods and single‐crystal X‐ray diffraction analysis: the square planar complexes [MX 2 ( 1 ‐κ 2 P , P’ )] (M/X=Ni/Cl, Pd/Cl, Pd/Br, Pd/I and Pt/Cl) and the tetrahedral complexes [M( 1 ‐κ 2 P , P ’) 2 ]X (M/X=Cu/PF 6 , Ag/SbF 6 and Au/SbF 6 ). Furthermore, a pair of open and cyclic digold(I) complexes containing bis‐phosphane 1 as a P,P‐bridging ligand, viz . [(μ(P,P’)‐ 1 )(AuCl) 2 ] and [(μ(P,P’)‐ 1 ) 2 Au 2 ][SbF 6 ] 2 , were isolated. Ligand 1 , the corresponding phosphane selenide 1‐Se and all complexes (except for the poorly soluble [(μ(P,P’)‐ 1 ) 2 Au 2 ][SbF 6 ] and unstable [Ag( 1 ‐κ 2 P , P ’) 2 ][SbF 6 ]) were further analyzed by cyclic voltammetry.