Chromium(III) acetylacetonate

Chromium(III) acetylacetonate[1]
Solid Chromium (III) acetylacetonate
Solid chromium(III) acetylacetonate
Names
IUPAC name
Tris(acetylacetonato)chromium(III)
Other names
Tris(2,4-pentanediono)chromium(III), Cr(acac)3, Cr(pd)3
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.040.463 Edit this at Wikidata
EC Number
  • 244-526-0
  • InChI=1S/3C5H7O2.Cr/c3*1-4(6)3-5(2)7;/h3*3H,1-2H3;/q3*-1;+3 checkY
    Key: GMJCSPGGZSWVKI-UHFFFAOYSA-N checkY
  • InChI=1/3C5H7O2.Cr/c3*1-4(6)3-5(2)7;/h3*3H,1-2H3;/q3*-1;+3
    Key: GMJCSPGGZSWVKI-UHFFFAOYAF
  • [Cr+3].O=C([CH-]C(=O)C)C.O=C([CH-]C(=O)C)C.O=C([CH-]C(=O)C)C
Properties
Cr(C5H7O2)3
Molar mass 349.32
Appearance deep maroon
Density 1.34 g/cm3
Melting point 210 °C (410 °F; 483 K)
Boiling point 340 °C (644 °F; 613 K) (sublimes near 110°C)[2]
Solubility in non-polar organic solvents soluble
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).
checkY verify (what is checkY☒N ?)

Chromium(III) acetylacetonate is the coordination compound with the formula Cr(C5H7O2)3, sometimes designated as Cr(acac)3. This purplish coordination complex is used in NMR spectroscopy as a relaxation agent because of its solubility in nonpolar organic solvents and its paramagnetism.

  1. ^ Chromium acetylacetonate Archived 2015-04-16 at the Wayback Machine at American Elements
  2. ^ Semyannikov, P.P.; Igumenov, I.K.; Trubin, S.V.; Chusova, T.P.; Semenova, Z.I. (February 2005). "Thermodynamics of chromium acetylacetonate sublimation". Thermochimica Acta. 432 (1): 91–98. doi:10.1016/j.tca.2005.02.034.