Hydridotetrakis(triphenylphosphine)rhodium(I)

From Wikipedia, the free encyclopedia
Hydridotetrakis(triphenylphosphine)­rhodium(I)
HRhP4.svg
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.153.466 Edit this at Wikidata
EC Number
  • 624-922-3
  • C1=CC=C(C=C1)P(C2=CC=CC=C2)C3=CC=CC=C3.C1=CC=C(C=C1)P(C2=CC=CC=C2)C3=CC=CC=C3.C1=CC=C(C=C1)P(C2=CC=CC=C2)C3=CC=CC=C3.C1=CC=C(C=C1)P(C2=CC=CC=C2)C3=CC=CC=C3.[Rh][H]
Properties
C72H61P4Rh
Molar mass 1153.12
Appearance yellow solid
Density 1.328 g/cm3
Melting point 162–163 °C (324–325 °F; 435–436 K)
Hazards
GHS labelling:
GHS07: Exclamation mark
Warning
H315, H319, H335
P261, P264, P271, P280, P302+P352, P304+P340, P305+P351+P338, P312, P321, P332+P313, P337+P313, P362, P403+P233, P405, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Hydridotetrakis(triphenylphosphine)rhodium(I) is the coordination complex with the formula HRh[P(C6H5)3]4. It consists of a Rh(I) center complexed to four triphenylphosphine (PPh3) ligands and one hydride. The molecule has idealized C3v symmetry.[1] The compound is a homogeneous catalyst for hydrogenation and related reactions.[2] It is a yellow solid that dissolves in aromatic solvents.

Preparation[edit]

In the presence of base, H2, and additional triphenylphosphine, Wilkinson's catalyst (chloridotris(triphenylphosphane)rhodium(I)) converts to HRh(PPh3)4:[3]

RhCl(PPh3)3 + H2 + KOH + PPh3 → RhH(PPh3)4 + H2O + KCl

References[edit]

  1. ^ Baker, R. W.; Pauling, Peter (1969). "The crystal and molecular structure of tetrakistriphenylphosphinerhodium(I) hydride". Journal of the Chemical Society D: Chemical Communications (24): 1495. doi:10.1039/c29690001495.
  2. ^ Eduardo Peña-Cabrera "Hydridotetrakis(triphenylphosphine)rhodium" Encyclopedia of Reagents for Organic Synthesis, 2001, John Wiley & Sons. doi:10.1002/047084289X.rh030m
  3. ^ Ahmad, N.; Levison, J. J.; Robinson, S. D.; Uttley, M. F. (2007). Hydrido Phosphine Complexes of Rhodium(I). Inorg. Synth. Inorganic Syntheses. Vol. 28. pp. 81–83. doi:10.1002/9780470132593.ch19. ISBN 9780470132593.