(Triphenylphosphine)iron tetracarbonyl

(Triphenylphosphine)iron tetracarbonyl is a coordination complex with the formula Fe(CO)4(PPh3) (Ph = C6H5). An off-white solid, this complex is derived from iron pentacarbonyl by replacement of one carbonyl ligand by triphenylphosphine (PPh3).

(Triphenylphosphine)iron tetracarbonyl
Identifiers
3D model (JSmol)
ChemSpider
  • InChI=1S/C18H15P.4CO.Fe/c1-4-10-16(11-5-1)19(17-12-6-2-7-13-17)18-14-8-3-9-15-18;4*1-2;/h1-15H;;;;;
    Key: GHXDZMLBRWBQAM-UHFFFAOYSA-N
  • [C-]#[O+].[C-]#[O+].[C-]#[O+].[C-]#[O+].C1=CC=C(C=C1)P(C2=CC=CC=C2)C3=CC=CC=C3.[Fe]
Properties
C22H15FeO4P
Molar mass 430.177 g·mol−1
Appearance white solid
Melting point 262–266 °C (504–511 °F; 535–539 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Synthesis and use

The title complex can be prepared by reaction of iron pentacarbonyl or triiron dodecacarbonyl with triphenylphosphine:[1]

Fe3(CO)12 + 3 P(C6H5)3 → 3 Fe(CO)4(P(C6H5)3)

The substitution is catalyzed by cobalt chloride.[2]

(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.[3]

References
  1. Clifford, A. F.; Mukherjee, A. K. (1966). "Iron Carbonyl Complexes of Triphenylphosphine, Triphenylarsine, and Triphenylstibine". Inorganic Syntheses. Vol. VIII. pp. 185–191. doi:10.1002/9780470132395.ch49. ISBN 9780470131671.
  2. Albers, Michel O.; Singleton, Eric; Coville, Neil J. (1989). Tetracarbonyliron(0) Complexes Containing Group V Donor Ligands. Inorganic Syntheses. Vol. 26. pp. 59–64. doi:10.1002/9780470132579.ch12. ISBN 9780470132579.
  3. Reppe, Walter; Schweckendiek, Walter Joachim (1948). "Cyclisierende Polymerisation von Acetylen. III Benzol, Benzolderivate und hydroaromatische Verbindungen". Justus Liebigs Annalen der Chemie. 560: 104–116. doi:10.1002/jlac.19485600104.
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