Tricarbonylbis(triphenylphosphine)iron(0) is a

coordination complex A coordination complex consists of a central atom or ion, which is usually metallic and is called the ''coordination centre'', and a surrounding array of bound molecules or ions, that are in turn known as ''ligands'' or complexing agents. Many ...

with the formula Fe(CO)₃(PPh₃)₂ (Ph = C₆H₅). A yellow solid, this complex is derived from iron pentacarbonyl by replacement of two carbonyl ligands by

triphenylphosphine Triphenylphosphine (IUPAC name: triphenylphosphane) is a common organophosphorus compound with the formula P(C6H5)3 and often abbreviated to P Ph3 or Ph3P. It is widely used in the synthesis of organic and organometallic compounds. PPh3 exists a ...

(PPh₃). It can also be produced by borohydride-catalyzed substitution of iron pentacarbonyl. Protonation gives the ferrous hydride. This complex has a

trigonal bipyramidal geometry In chemistry, a trigonal bipyramid formation is a molecular geometry with one atom at the center and 5 more atoms at the corners of a triangular bipyramid. This is one geometry for which the bond angles surrounding the central atom are not identi ...

with trans phosphines. (Triphenylphosphine)iron tetracarbonyl is an intermediate in the synthesis of this compound. Both the mono- and bis(triphenylphosphine) complexes were originally described by Walter Reppe.{{cite journal , first1=Walter, last1=Reppe, first2=Walter Joachim, last2=Schweckendiek, doi=10.1002/jlac.19485600104, title=Cyclisierende Polymerisation von Acetylen. III Benzol, Benzolderivate und hydroaromatische Verbindungen, journal=Justus Liebigs Annalen der Chemie, year=1948, volume=560, pages=104–116

References

Triphenylphosphine complexes Coordination complexes Carbonyl complexes Iron compounds