Titanium bis(acetylacetonate)dichloride

From Wikipedia, the free encyclopedia
Titanium bis(acetylacetonate)dichloride
TiCl2(acac)2.png
Names
IUPAC name
(OC-6-2′2)-Dichlorido(2,4-dioxopentan-3-ido-κ2O,O′)titanium
Other names
dichlorobis(2,4-pentanedionato)titanium, dichlorobis(2,4-acetylacetonato)titanium, bis(acetylacetonato)dichlorotitanium
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.037.415 Edit this at Wikidata
EC Number
  • 241-172-9
  • InChI=1S/2C5H8O2.2ClH.Ti/c2*1-4(6)3-5(2)7;;;/h2*3,6H,1-2H3;2*1H;/q;;;;+4/p-4/b2*4-3-;;;
    Key: LUDYOTBRNXNKAB-VGKOASNMSA-J
  • ionic form: CC(=CC(=O)C)[O-].CC(=CC(=O)C)[O-].[Cl-].[Cl-].[Ti+4]
  • coordination form: Cl[Ti-2]12(Cl)(OC(C)=CC(C)=[O+]1)OC(C)=CC(C)=[O+]2
Properties
C10H14Cl2O4Ti
Molar mass 316.99 g·mol−1
Appearance red-orange solid
Density 1.514 g/cm3
Melting point 191 °C (376 °F; 464 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Titanium bis(acetylacetonate)dichloride is the coordination complex with the formula Ti(C5H7O2)2Cl2. It is a common acetylacetonate complex of titanium. It is a red-orange solid that hydrolyzes slowly in air.[1]

The complex is prepared by treatment of titanium tetrachloride with excess acetylacetone:[1]

TiCl4 + 2 Hacac → Ti(acac)2Cl2 + 2 HCl

It is an octahedral complex that crystallizes as a racemic mixture of the chiral cis isomers.[2] It is fluxional in solution, as the result of rapid cis–trans equilibrium.[3]

References[edit]

  1. ^ a b Wilkie, C. A.; Lin, G.; Haworth, D. T. (1979). "cis-[Dihalobis(2,4-Pentanedionato)Titanium(IV)] Complexes". Inorg. Synth. 19: 145–148. doi:10.1002/9780470132500.ch33.
  2. ^ Ferguson, George; Glidewell, Christopher (2001). "Enantiomeric disorder in racemic cis-dichlorobis(pentane-2,4-dionato)titanium(IV)". Acta Crystallographica Section C. 57 (3): 264–265. doi:10.1107/S0108270100019181. PMID 11250571.
  3. ^ Bradley, D. C.; Holloway, C. E. (1969). "Nuclear magnetic resonance and infrared spectral studies on labile cis-dialkoxy-bis(acetylacetonato)titanium(IV) compounds". J. Chem. Soc. A: 282–285. doi:10.1039/J19690000282. S2CID 97560520.