Influence of the central metal on the crystal structures and electronic structures of biferrocene trinuclear complexes

► The central metal ions influence the electronic and crystal structures. ► The central d8 transition metal ions (Ni2+, Pd2+ and Pt2+) are in a square-planar. ► The d10 transitionmetal ions (Zn2+ and Cd2+) are tetrahedrally coordinated. ► The s electron density at the iron nucleus is affected by the center metals, too.