Models of the iron-only hydrogenase: structural studies of chelating diphosphine complexes [Fe2(CO)4(micro-pdt)(kappa2P,P'-diphosphine)].

Six chelating diphosphine complexes, [Fe2(CO)4(micro-pdt)(kappa2P,P'-diphosphine)], have been crystallographically characterised allowing differences between basal-apical and dibasal conformations to be analysed.