(Triphenylphosphine)iron tetracarbonyl is a coordination complex with the formula Fe(CO)<sub>4</sub>(PPh<sub>3</sub>) (Ph = C<sub>6</sub>H<sub>5</sub>). An off-white solid, this complex is derived from iron pentacarbonyl by replacement of one carbonyl ligand by triphenylphosphine (PPh<sub>3</sub>).
The title complex can be prepared by reaction of iron pentacarbonyl or triiron dodecacarbonyl with triphenylphosphine:
The substitution is catalyzed by cobalt chloride.
(Triphenylphosphine)iron tetracarbonyl is an intermediate in the synthesis of bis(triphenylphosphine)iron tricarbonyl. Both the mono- and bis(triphenylphosphine) complexes were originally employed in pioneering research on homogeneous catalysis by Walter Reppe.