Titanocene dicarbonyl
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.
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| Names | |
|---|---|
| IUPAC name
dicarbonylbis(η5-cyclopentadienyl)titanium(II) | |
| Other names
Dicarbonyldi-π-cyclopentadienyltitanium | |
| Identifiers | |
| Properties | |
| C12H10O2Ti | |
| Molar mass | 234.09 g/mol |
| Appearance | maroon solid pyrophoric |
| Melting point | 90 °C (194 °F; 363 K) |
| Boiling point | Sublimes at 40 to 80 °C (104 to 176 °F; 313 to 353 K) at 0.001 mmHg |
| insoluble | |
| Solubility in other solvents | THF, benzene |
| Structure | |
| tetrahedral | |
| Hazards | |
| Main hazards | flammable |
| Related compounds | |
Related compounds |
Cp2TiCl2 |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
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| Infobox references | |
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
- Sikora, D. J.; Moriarty, K. J.; Rausch, M. D. (1990). "Reagents for Transition Metal complex and Organometallic syntheses". Inorganic Syntheses. 28: 250–251. doi:10.1002/9780470132593.ch64.
- "Dicarbonylbis(cyclopentadienyl)titanium". Encyclopedia of Reagents for Organic Synthesis. John Wiley & Sons, Ltd. 2001. doi:10.1002/047084289X.rd073.
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