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.[2]

It is prepared by treating rhodium carbonyl chloride with sodium acetylacetonate in the presence of base:[3]

[(CO)2RhCl]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.[1]

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

References

  1. ^ a b 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.
Allikas: https://en.wikipedia.org/wiki/Dicarbonyl(acetylacetonato)rhodium(I)
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