Titanocene dicarbonyl

Titanocene dicarbonyl
IUPAC name dicarbonylbis (η5- cyclopentadienyl) titanium
Other names Dicarbonyldi- π-cyclopentadienyltitanium Dicarbonylbis (η5- cyclopentadienyl) titanium(IV)
Identifiers
CAS number	12129-51-0
Properties
Molecular formula	C12H10O2Ti
Molar mass	234.09 g/mol
Appearance	maroon solid pyrophoric
Melting point	90 °C
Boiling point	Sublimes40-80 °C @0.001 mm Hg
Solubility in water	insoluble
Solubility in other solvents	THF, benzene
Structure
Coordination geometry	tetrahedral
Hazards
Main hazards	flammable
Related compounds
Related compounds	Cp2TiCl2
Y dicarbonyl (verify) (what is: Y/N?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Dicarbonylbis(cyclopentadienyl)titanium is the chemical compound with the formula (η⁵-C₅H₅)₂Ti(CO)₂, abbreviated Cp₂Ti(CO)₂. This maroon-coloured, air-sensitive species is soluble in aliphatic and aromatic solvents^[1]. It has been used for the deoxygenation of sulfoxides, reductive coupling of aromatic aldehydes and reduction of aldehydes

Structure and synthesis

Cp₂Ti(CO)₂ is prepared via the reduction of titanocene dichloride with magnesium under an atmosphere of carbon monoxide.^[2]

(C₅H₅)₂TiCl₂ + Mg + 2 CO → (C₅H₅)₂Ti(CO)₂ + MgCl₂

Both Cp₂Ti(CO)₂ and Cp₂TiCl₂ are tetrahedral as are related zirconium and hafnium compounds.

References

1. ^ Sikora, D.J.; Moriarty, K.J.; Rausch, M.D. (1990). "Reagents for Transition Metal complex and Organometallic syntheses." Inorganic Sytheses. 28. pp. 250-251.
2. ^ "Dicarbonylbis(cyclopentadienyl)titanium". Encyclopedia of Reagents for Organic Synthesis. John Wiley & Sons, Ltd. 2001. doi:10.1002/047084289X.rd073.