inorganic compounds
The title [Fe(CO)4(P4O6) molecule consists of a trigonal-bipyramidally coordinated Fe atom, with the adamantane-like P4O6 cage in an axial position. As a consequence of the electronic effects of the iron–carbonyl group on the P4O6 cage, the P—O bond lengths show distortions similar to those observed within the series P4O7→P4O6S→P4O6Se, but the effects are slightly less pronounced.