Preparation
Cp2TiCl2 continues to be prepared from titanium tetrachloride, in the same way as its original synthesis by Wilkinson and Birmingham:
- 2 NaC5H5 + TiCl4 → (C5H5)2TiCl2 + 2 NaCl
The reaction is conducted in THF. Work-up sometimes washing with hydrochloric acid to convert hydrolysis derivatives to the dichloride. Recrystallization from toluene forms acicular crystals.
Cp2TiCl2 can also be prepared by using freshly distilled cyclopentadiene:
- 2 C5H6 + TiCl4 → (C5H5)2TiCl2 + 2 HCl
This reaction is conducted under a nitrogen atmosphere and by using THF as solvent. The product is purified by soxhlet extraction using toluene as solvent.
The complex is pseudotetrahedral. Each of the two Cp rings are attached as η5 ligands. Viewing the Cp ligands as tridentate, the complex has a coordination number of 8.
Read more about this topic: Titanocene Dichloride
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