Titanocene dichloride

• Dichloridobis (cyclopentadienyl ) titanium (IV)
• Bis ( η5 -cyclopentadienyl ) titanium

Red, odorless solid

Fixed

1.6 g · cm -3

289-290 ° C

Decomposition in water

Attention

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Titanocene dichloride ( dichlorobis (cyclopentadienyl ) titanium (IV) ) is a metallocene of titanium, that is, a metallo-organic compound containing aromatic ring systems. The central Ti (IV ) ion is tetrahedrally surrounded by two cyclopentadienyl rings here and two chloride ligands. Due to its reactivity with water and it has sensitivity to oxidation under an argon or more preferably in the charged first with argon, and then evacuated container (e.g., a Schlenk tube ) are stored.

Use

Titanocene dichloride can be used as a homogeneous catalyst in a Ziegler-Natta -type polymerization. Common monomers are, for example, Styrene or propene. The Tebbe reagent used for methylenation can be prepared from titanocene dichloride.

History

First synthesis of Ernst Otto Fischer and Geoffrey Wilkinson. These received the 1973 Nobel Prize in Chemistry for their work on organometallic compounds, which also explained the bonding in so-called metallocenes.