(Cyclopentadienyl)titanium trichloride explained

(Cyclopentadienyl)titanium trichloride is an organotitanium compound with the formula (CH)TiCl. It is a moisture sensitive orange solid. The compound adopts a piano stool geometry.^[1]

Preparation and reactions

is prepared by the reaction of titanocene dichloride and titanium tetrachloride:

The complex is electrophilic, readily forming alkoxide complexes upon treatment with alcohols.^[2]

Reduction of (cyclopentadienyl)titanium trichloride with zinc powder gives the polymeric Ti(III) derivative (cyclopentadienyl)titanium dichloride:^[3]

A related reduction can be effected with cobaltocene:^[4]

Other evidence for the Lewis acidity of the trichloride is the ready formation of adducts with phosphine ligands:^[5]

See also

• (Cyclopentadienyl)zirconium trichloride
• (Pentamethylcyclopentadienyl)titanium trichloride
• (Indenyl)titanium trichloride^[6]

Notes and References

1. Rossini, A. J.. Mills, R. W.. Briscoe, G. A.. Norton, E. L.. Geier, S. J.. Hung, I.. Zheng, S.. Autschbach, J.. Schurko, R. W.. 4. Solid-State Chlorine NMR of Group IV Transition Metal Organometallic Complexes. Journal of the American Chemical Society. 2009. 131. 9. 3317–3330. 10.1021/ja808390a. 19256569.
2. Trichloro(cyclopentadienyl)titanium. EEROS. Andreas Hafner. Rudolf O. Duthaler. 2001. 10.1002/047084289X.rt202m. 0-471-93623-5.
3. Book: 10.1002/9780470132470.ch62. Inorganic Syntheses. 2007. Lucas. C. R.. Green. M. L. H.. Some η-Cyclopentadienyl Complexes of Titanium(III) . 237–240. 1976. 16. 978-0-470-13178-7 .
4. 10.1016/S0277-5387(00)80641-5 . Synthesis of [Co(η⁵-C₅H₅)₂][M(η⁵-C₅H₅)Cl₃] salts (M = Ti or V): Crystal structure of [Co(η⁵-C₅H₅)2][Tc(η⁵-C₅H₅)Cl₃] . 1989 . Hughes . D.L. . Jimenez-Tenorio . M. . Leigh . G.J. . Polyhedron . 8 . 13–14 . 1780–1781 .
5. 10.1021/ic00078a008 . Radical Routes to Titanium(IV) Thiolate Complexes: Structure and Reactivity of ((η⁵--C₅H₅)Ti^III and -Ti^IV Donor and Thiolate Derivatives . 1993 . Nadasdi . T. Timothy . Stephan . Douglas W. . Inorganic Chemistry . 32 . 26 . 5933–5938 .
6. Book: 10.1002/9780470132630.ch36. Monoindenyltrichloride Complexes of Titanium(IV), Zirconium(IV), and Hafnium(IV). 215–221. 1998. 32. Morris. Robert J.. Shaw. Scott L.. Jefferis. Jesse M.. Storhoff. James J.. Goedde. Dean M.. Inorganic Syntheses . 978-0-471-24921-4 .