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Dicarbonyl(acetylacetonato)rhodium(I)

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Dicarbonyl(acetylacetonato)­rhodium(I)
Names
Other names Rhodium acetylacetonate dicarbonyl
Identifiers
CAS Number
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.035.392 Edit this at Wikidata
PubChem CID
InChI
  • InChI=1S/C5H8O2.2CO.Rh/c1-4(6)3-5(2)7;2*1-2;/h3,6H,1-2H3;;;/b4-3+;;;Key: GGRQQHADVSXBQN-FHJHGPAASA-N
SMILES
  • coordination form: CC(=C(C)O1)O1(C#)C#
  • ionic form: C/C(=C/C(=O)C)/.#.#.
Properties
Chemical formula C7H7O4Rh
Molar mass 258.034 g·mol
Appearance green solid
Density 1.95 g/cm
Melting point 155 °C (311 °F; 428 K)
Structure
Crystal structure triclinic
Space group P1
Lattice constant a = 6.5189 Å, b = 7.7614 Å, c = 9.205 Åα = 106.04°, β = 91.15°, γ = 100.21°at 20°C
Lattice volume (V) 439.3 Å
Formula units (Z) 2
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). Infobox references
Chemical compound

Dicarbonyl(acetylacetonato)rhodium(I) is an organorhodium compound with the formula Rh(O2C5H7)(CO)2. The compound consists of two CO ligands and an acetylacetonate. It is a dark green solid that dissolves in acetone and benzene, giving yellow solutions. The compound is used as a precursor to homogeneous catalysts.

It is prepared by treating rhodium carbonyl chloride with sodium acetylacetonate in the presence of base:

2 + 2 NaO2C5H7 → 2 Rh(O2C5H7)(CO)2 + 2 NaCl

The complex adopts square planar molecular geometry. The molecules stack with Rh---Rh distances of about 326 pm. As such, it is representative of a linear chain compound.

Portion of the lattice of Rh(acac)(CO)2 showing the "stacking" of the individual planar units through Rh---Rh interactions.

References

  1. ^ Huq, Fazlul; Skapski, Andrzej C. (1974). "Refinement of the Crystal Structure of Acetylacetonatodicarbonylrhodium(I)". Journal of Crystal and Molecular Structure. 4 (6): 411–418. doi:10.1007/BF01220097. S2CID 96977904.
  2. Zacuto, Michael J.; Leighton, James L. (2002). "Dicarbonyl(acetylacetonato) Rhodium(I)". Encyclopedia of Reagents for Organic Synthesis. doi:10.1002/047084289X.rn00024. ISBN 0471936235.
  3. Bonati, F.; Wilkinson, G. (1964). "Dicarbonyl-β-diketonato- and Related Complexes of Rhodium(I)". J. Chem. Soc.: 3156–3160. doi:10.1039/JR9640003156.
Rhodium compounds
Rh(0)
Organorhodium(0) compounds
Rh(I)
Organorhodium(I) compounds
Rh(II)
Organorhodium(II) compunds
Rh(III)
Organorhodium(III) compunds
  • ((CH3)5C5RhCl2)2
  • Rh(O2C5H7)3
    • Rh(IV)
    Rh(V)
    Rh(VI)
    Metal acetylacetonate complexes
    H(acac) He
    Li Be B C N O F Ne
    Na(acac) Mg Al(acac)3 Si P S Cl Ar
    K Ca Sc(acac)3 Ti(acac)2Cl2
    Ti(acac)3     		V(acac)3
    VO(acac)2     		Cr(acac)2
    Cr(acac)3     		Mn Fe(acac)2
    Fe(acac)3     		Co(acac)2
    Co(acac)3     		3 Cu(acac)2 Zn(acac)2 Ga(acac)3 Ge As Se Br Kr
    Rb Sr Y(acac)3 Zr(acac)4 Nb MoO2(acac)2 Tc Ru(acac)3 Rh(acac)(CO)2
    Rh(acac)3     		Pd(acac)2 Ag Cd In(acac)3 Sn Sb Te I Xe
    Cs Ba(acac)2 * Lu(acac)3 Hf(acac)4 Ta W Re Os Ir(acac)3 Pt(acac)2 Au Hg Tl(acac) Pb Bi Po At Rn
    Fr Ra ** Lr Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og
     
    * La(acac)3 Ce(acac)3 Pr(acac)3 Nd(acac)3 Pm Sm(acac)3 Eu(fod)3
    Eu(acac)3     		Gd(acac)3 Tb(acac)3 Dy(acac)3 Ho(acac)3 Er(acac)3 Tm(acac)3 Yb(acac)3
    ** Ac Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No
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