Keywords: bimetallic complexes; cooperative effects; ferrocenophane; metalloligands; stimuli-responsive ligands EN bimetallic complexes cooperative effects ferrocenophane metalloligands stimuli-responsive ligands 15014 15014 1 11/05/21 20211102 NES 211102 B A retro-style arcade machine b needs an oxidant or a proton to be inserted to start playing and to switch the donating capabilities of novel phosphine ligands orthogonally and reversibly. The Japanese kanji for "iron" highlights the ferrocene moiety in the ligands' metal complexes. Bimetallic complexes, cooperative effects, ferrocenophane, metalloligands, stimuli-responsive ligands.